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题解

28 条题解

  • 1
    @ 2021-08-30 09:57:13 
    #include <bits/stdc++.h>
using namespace std;

int main(){
    int n,a; cin>>n;
    for(int i=n;i>=0;i--){
        cin>>a;
        if(a){
            if(i!=n&&a>0)
                cout<<"+";
            if(abs(a)>1||i==0)
                cout<<a;
            if(a==-1&&i)
                cout<<"-";
            if(i>1)
                cout<<"x^"<<i;
            if(i==1)
                cout<<"x";
        }
    }
    return 0;
}
  • 1
    @ 2018-02-06 10:13:14 
    #include<bits/stdc++.h>
long long int n, m;
long long int num[110];
int main() {
    scanf("%lld", &n);
    for(int i=1; i<=n+1; i++)
        scanf("%lld", &num[i]);
    if(fabs(num[1])!=1) printf("%lldx^%lld", num[1], n);
    else {
        if(num[1]==1) printf("x^%lld", n);
        else printf("-x^%lld", n);
    }
    int j=n;
    for(int i=2; i<n; i++) {
        j--;
        if(num[i]==0) continue;
        else {
            if(fabs(num[i])==1) {
                if(num[i]==1) printf("+x^%lld", j);
                if(num[i]==-1) printf("-x^%lld", j);
            } else {
                if(num[i]>0) printf("+%lldx^%lld", num[i], j);
                if(num[i]<0) printf("%lldx^%lld", num[i], j);
            }
        }
    }
    if(num[n]!=0) {
        if(num[n]>0) {
            if(num[n]==1) printf("+x");
            if(num[n]!=1) printf("+%lldx", num[n]);
        }
        if(num[n]<0) {
            if(num[n]==-1) printf("-x");
            if(num[n]!=-1) printf("%lldx", num[n]);
        }
    }
    if(num[n+1]==0) printf("\n");
    else {
        if(num[n+1]>0) printf("+%lld", num[n+1]);
        if(num[n+1]<0) printf("%lld", num[n+1]);
    }
    return 0;
}
  • 0
    @ 2024-09-01 13:56:25 
    #include<stdio.h>
using namespace std;
int main(){
    int n, a;
    scanf("%d", &n);
    if(n == 1)goto p;
    scanf("%d", &a);
    if(a){
        if(a == 1)printf("x^%d", n);
        else if(a == -1)printf("-x^%d", n);
        else printf("%dx^%d", a, n);
    }
    if(n == 2)goto p;
    for(int i = n-1; i > 1; i--){
        scanf("%d", &a);
        if(a){
            if(a == 1)printf("+x^%d", i);
            else if(a == -1)printf("-x^%d", i);
            else printf("%+dx^%d", a, i);
        }
    }
    p:
    scanf("%d", &a);
    if(a){
        if(a == 1)printf("+x");
        else if(a == -1)printf("-x");
        else if(n != 1)printf("%+dx", a);
        else printf("%dx", a);
    }
    scanf("%d", &a);
    if(a)printf("%+d", a);
    return 0;
}
  • 0
    @ 2018-04-22 22:42:44 
    #include <iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int n2=n;
    if(n==1)
    {
        int m,n1;
        cin>>m>>n1;
        if(m!=0)
        {
            if(m==1)
            {
                if(n1>0) cout<<"x"<<"+"<<n1<<endl;
                else if(n1==0) cout<<"x"<<endl;
                else if(n1<0) cout<<"x"<<n1<<endl;
            }
            else if(m==-1)
            {
                if(n1>0) cout<<"-x"<<"+"<<n1<<endl;
                else if(n1==0) cout<<"-x"<<endl;
                else if(n1<0) cout<<"-x"<<n1<<endl;
            } 
            else 
            {
                if(n1>0) cout<<m<<"x"<<"+"<<n1<<endl;
                else if(n1==0) cout<<m<<"x"<<endl;
                else if(n1<0) cout<<m<<"x"<<n1<<endl;
            }
        }
        else if(m==0)
        {
            cout<<n1<<endl;
        }
    }
    else if(n>1)
    {
        int a[101];
        int i,j,n1,m;
        for(i=1;i<=n+1;i++)
            cin>>a[i];
        m=a[n];n1=a[n+1];
        bool flag=false;
        for(i=1;i<=n2-1;i++)
        {
            if(a[i]!=0)
            {
                flag=true;
                if(a[i]!=1&&a[i]!=-1) cout<<a[i]<<"x^"<<n;
                else if(a[i]==1) cout<<"x^"<<n;
                else if(a[i]==-1) cout<<"-x^"<<n;
                n--;
                if(a[i+1]>0) cout<<"+";
            }
            else if(a[i]==0)
            {
                n--;
                if(a[i+1]>0&&flag==true) cout<<"+";
            }
        }
        if(flag==true)
        {
            if(m!=0)
            {
                if(m==1)
                {
                    if(n1>0) cout<<"x"<<"+"<<n1<<endl;
                    else if(n1==0) cout<<"x"<<endl;
                    else if(n1<0) cout<<"x"<<n1<<endl;
                }
                else if(m==-1)
                {
                    if(n1>0) cout<<"-x"<<"+"<<n1<<endl;
                    else if(n1==0) cout<<"-x"<<endl;
                    else if(n1<0) cout<<"-x"<<n1<<endl;
                } 
                else if(m>0&&m!=-1)
                {
                    //cout<<"+";
                    if(n1>0) cout<<m<<"x"<<"+"<<n1<<endl;
                    else if(n1==0) cout<<m<<"x"<<endl;
                    else if(n1<0) cout<<m<<"x"<<n1<<endl;
                }
                else if(m<0&&m!=-1)
                {
                    if(n1>0) cout<<m<<"x"<<"+"<<n1<<endl;
                    else if(n1==0) cout<<m<<"x"<<endl;
                    else if(n1<0) cout<<m<<"x"<<n1<<endl;
                }
            }
            else if(m==0)
            {
                if(n1<0) cout<<n1<<endl;
                else if(n1>0) cout<<"+"<<n1;
            }   
        }
        else if(flag==false)
        {
            if(m!=0)
        {
            if(m==1)
            {
                if(n1>0) cout<<"x"<<"+"<<n1<<endl;
                else if(n1==0) cout<<"x"<<endl;
                else if(n1<0) cout<<"x"<<n1<<endl;
            }
            else if(m==-1)
            {
                if(n1>0) cout<<"-x"<<"+"<<n1<<endl;
                else if(n1==0) cout<<"-x"<<endl;
                else if(n1<0) cout<<"-x"<<n1<<endl;
            } 
            else 
            {
                if(n1>0) cout<<m<<"x"<<"+"<<n1<<endl;
                else if(n1==0) cout<<m<<"x"<<endl;
                else if(n1<0) cout<<m<<"x"<<n1<<endl;
            }
        }
        else if(m==0)
        {
            cout<<n1<<endl;
        }
        }
    }
    return 0;
}
  • 0
    @ 2017-11-10 20:02:36

    //注意细节!!!!!!
    var n,i:longint;
    a:array[0..102]of longint;
    p:shortstring;
    begin
    readln(n);
    for i:=n downto 0 do read(a[i]);
    for i:=n downto 1 do
    begin
    if a[i]=0 then continue;
    p:='';
    if a[i]>0 then p:='+'
    else p:='-';
    if(i=n)and(a[i]>0)then p:='';
    a[i]:=abs(a[i]);
    if a[i]=1 then write(p,'x^',i)
    else write(p,a[i],'x^',i);
    end;
    if a[0]<>0 then
    begin
    p:='';
    if a[0]>0 then p:='+'
    else p:='-';
    a[0]:=abs(a[0]);
    if a[0]=1 then writeln(p,'x')
    else writeln(p,a[0])
    end;
    end.

  • 0
    @ 2017-10-22 11:16:49

    #include<stdio.h>
    int a[105];
    int main()
    {
    freopen("poly.in","r",stdin);
    freopen("poly.out","w",stdout);
    int n,i,j;
    scanf("%d",&n);
    for(i=n;i>=0;i--)//输入系数
    scanf("%d",&a[i]);
    //下面3个if语句处理最高次项（首项）的情况
    if(a[n]>0&&a[n]!=1||a[n]<0&&a[n]!=-1)
    printf("%dx^%d",a[n],n);
    if(a[n]==1)printf("x^%d",n);
    if(a[n]==-1)printf("-x^%d",n);
    for(i=n-1;i>=2;i--)
    { //下面4个if语句处理中间项（非一次项）的情况
    if(a[i]>0&&a[i]!=1)printf("+%dx^%d",a[i],i);
    if(a[i]<0&&a[i]!=-1)printf("%dx^%d",a[i],i);
    if(a[i]==1)printf("+x^%d",i);
    if(a[i]==-1)printf("-x^%d",i);
    }
    //下面4个if语句处理一次项的情况
    if(a[1]>0&&a[1]!=1)printf("+%dx",a[1]);
    if(a[1]<0&&a[1]!=-1)printf("%dx",a[1]);
    if(a[1]==1)printf("+x");
    if(a[1]==-1)printf("-x");
    //下面２个if语句处理常数项的情况
    if(a[0]>0)printf("+%d",a[0]);
    if(a[0]<0)printf("%d",a[0]);
    return 0;
    }

    • @ 2017-10-22 11:37:15

      注意去掉freopen

  • 0
    @ 2017-10-21 10:32:06

    pascal

    var
    n:longint;
    a:array[1..500]of longint;
    i,j,s:longint;
    begin
    readln(n);
    for i:=1 to n+1 do
    read(a[i]);
    for s:=1 to n+1 do
    if a[s]<>0 then
    begin
    if s=n+1 then write(a[s])//只有一个
    else
    begin
    if a[s]<0 then write('-');
    a[s]:=abs(a[s]);
    if a[s]<>1 then write(a[s]);
    if s=n then write('x')
    else write('x^',n+1-s);
    end;
    break;
    end;//处理第一个

    for i:=s+1 to n+1 do
    if a[i]<>0 then
    begin
    if a[i]>0 then write('+')
    else write('-');
    if (abs(a[i])<>1)or(i=n+1) then write(abs(a[i]));//常数为一或系数不为一
    if i<>n+1 then
    if i=n then write('x')
    else write('x^',n+1-i);

    end;
    end.

  • 0
    @ 2017-08-12 14:31:13

    #include<iostream>
    int n[101];
    using namespace std;
    int main()
    {
    int a,i,k=0,m=0;
    cin>>a;
    for(i=1;i<=a+1;i++)
    {
    cin>>n[i];
    }
    for(i=1;i<=a+1;i++)
    {
    if(n[i]!=0)
    {
    m++;
    }
    }
    if(m==0)
    {
    cout<<"0";
    return 0;
    }
    if(a==0)
    {
    cout<<n[1];
    return 0;
    }
    for(i=a;i>0;i--)
    {
    if(k==0&&n[a-i+1]!=0)
    {
    if(n[a-i+1]!=1&&n[a-i+1]!=-1)
    {
    cout<<n[a-i+1];
    }
    if(n[a-i+1]==-1)
    {
    cout<<"-";
    }
    cout<<"x^"<<i;
    k++;
    continue;
    }
    if(k==1)
    {
    if(n[a-i+1]==0)
    {
    continue;
    }
    else
    {
    if(n[a-i+1]>0)
    {
    cout<<"+";
    }
    if(n[a-i+1]!=1&&n[a-i+1]!=-1)
    {
    cout<<n[a-i+1];
    }
    else if(n[a-i+1]==-1)
    {
    cout<<"-";
    }
    if(i==1)
    cout<<"x";
    else
    cout<<"x^"<<i;
    }
    }
    }
    if(n[a+1]==0)
    {
    return 0;
    }
    else if(n[a+1]>0)
    {
    cout<<"+";
    }
    cout<<n[a+1];
    }

  • 0
    @ 2017-08-12 14:30:57

    #include<iostream>
    int n[101];
    using namespace std;
    int main()
    {
    int a,i,k=0,m=0;
    cin>>a;
    for(i=1;i<=a+1;i++)
    {
    cin>>n[i];
    }
    for(i=1;i<=a+1;i++)
    {
    if(n[i]!=0)
    {
    m++;
    }
    }
    if(m==0)
    {
    cout<<"0";
    return 0;
    }
    if(a==0)
    {
    cout<<n[1];
    return 0;
    }
    for(i=a;i>0;i--)
    {
    if(k==0&&n[a-i+1]!=0)
    {
    if(n[a-i+1]!=1&&n[a-i+1]!=-1)
    {
    cout<<n[a-i+1];
    }
    if(n[a-i+1]==-1)
    {
    cout<<"-";
    }
    cout<<"x^"<<i;
    k++;
    continue;
    }
    if(k==1)
    {
    if(n[a-i+1]==0)
    {
    continue;
    }
    *else*
    {
    if(n[a-i+1]>0)
    {
    cout<<"+";
    }
    if(n[a-i+1]!=1&&n[a-i+1]!=-1)
    {
    cout<<n[a-i+1];
    }
    else if(n[a-i+1]==-1)
    {
    cout<<"-";
    }
    if(i==1)
    cout<<"x";
    else
    cout<<"x^"<<i;
    }
    }
    }
    if(n[a+1]==0)
    {
    return 0;
    }
    else if(n[a+1]>0)
    {
    cout<<"+";
    }
    cout<<n[a+1];
    }

  • 0
    @ 2017-08-03 10:22:33 
    #include <cstdio>
#include <iostream>
#include <cstring>
#include <algorithm>

using namespace std;

int n;
int xs[105];

int main() {
    cin >> n;
    for (int i = n; i >= 0; i--) cin >> xs[i];
    if (xs[n] > 0) {
        if (xs[n] != 1)cout << xs[n] << "x^" << n;
        else cout << "x^" << n;
        n--;
    }
    
    while (n != -1) {
        if (xs[n] == 0) {
            n--;
            continue;
        }
        if (xs[n] > 0) cout << '+';
        if (n != 0 && n != 1) {
            if (xs[n] != 1 && xs[n] != -1) cout << xs[n];
            if (xs[n] == -1) cout << '-';
            cout << "x^" << n;
        }
        else if (n == 0) { 
            cout << xs[n]; 
        }
        else if (n == 1) { 
            if (xs[n] != 1 && xs[n] != -1)cout << xs[n]; 
            if (xs[n] == -1) cout << '-';
            cout << "x";
        }
        n--;
    }   
    return 0;
}
  • 0
    @ 2016-11-06 11:43:27

    为什么我那么短==我明明AC了呀==
    ~~~c++
    测试数据 #0: Accepted, time = 0 ms, mem = 564 KiB, score = 10
    测试数据 #1: Accepted, time = 0 ms, mem = 560 KiB, score = 10
    测试数据 #2: Accepted, time = 0 ms, mem = 560 KiB, score = 10
    测试数据 #3: Accepted, time = 0 ms, mem = 564 KiB, score = 10
    测试数据 #4: Accepted, time = 0 ms, mem = 564 KiB, score = 10
    测试数据 #5: Accepted, time = 0 ms, mem = 560 KiB, score = 10
    测试数据 #6: Accepted, time = 0 ms, mem = 560 KiB, score = 10
    测试数据 #7: Accepted, time = 0 ms, mem = 568 KiB, score = 10
    测试数据 #8: Accepted, time = 0 ms, mem = 560 KiB, score = 10
    测试数据 #9: Accepted, time = 0 ms, mem = 560 KiB, score = 10
    Accepted, time = 0 ms, mem = 568 KiB, score = 100

    #include<bits/stdc++>
    using namespace std;
    int n,i,t;
    int main(){
    cin>>n;
    for(i=n;i>=0;i--){
    cin>>t;
    if(t==0) continue;
    if(t<0){
    cout<<'-';t=-t;
    }
    else if(i!=n) cout<<'+';
    if(i==0){
    cout<<t;return 0;
    }
    if(t!=1) cout<<t;
    if(i>0) cout<<'x';
    if(i>1) cout<<'^'<<i;
    }
    }
    ~~~

  • 0
    @ 2016-09-06 12:19:47 
    评测结果
编译成功

测试数据 #0: Accepted, time = 0 ms, mem = 560 KiB, score = 10
测试数据 #1: Accepted, time = 0 ms, mem = 556 KiB, score = 10
测试数据 #2: Accepted, time = 0 ms, mem = 556 KiB, score = 10
测试数据 #3: Accepted, time = 0 ms, mem = 556 KiB, score = 10
测试数据 #4: Accepted, time = 0 ms, mem = 556 KiB, score = 10
测试数据 #5: Accepted, time = 0 ms, mem = 556 KiB, score = 10
测试数据 #6: Accepted, time = 0 ms, mem = 556 KiB, score = 10
测试数据 #7: Accepted, time = 0 ms, mem = 560 KiB, score = 10
测试数据 #8: Accepted, time = 0 ms, mem = 556 KiB, score = 10
测试数据 #9: Accepted, time = 0 ms, mem = 556 KiB, score = 10
Accepted, time = 0 ms, mem = 560 KiB, score = 100
代码
#include <iostream>
using namespace std;
int main() {
  ios :: sync_with_stdio(false);
  //ifstream cin("poly.in",ios :: in);
  //ofstream cout("poly.out",ios :: out);
  int n,x;
  cin >> n >> x;
  if (x == 1) cout << "x^" << n;
  else if (x == -1) cout << "-x^" << n;
  else cout << x << "x^" << n;
  for (int i = 1;i < n-1;i++) {
    cin >> x;
    if (x == 1) cout << "+x^" << n-i;
    else if (x == -1) cout << "-x^" << n-i;
    else if (x > 0) cout  << '+' << x << "x^" << n-i;
    else if (x < 0) cout  << x << "x^" << n-i;
  }
  cin >> x;
  if (x == 1) cout << "+x";
  else if (x == -1) cout << "-x";
  else if (x > 0) cout << '+' << x << "x";
  else if (x > 0) cout << '+' << x << "x";
  else if (x < 0) cout << x << "x";
  cin >> x;
  if (x > 0) cout << '+' << x;
  else if (x < 0) cout << x;
  return 0;
}
  • 0
    @ 2016-03-17 19:03:29

    细节题。所有细节都考虑到了的话自然就AC了。
    #include <iostream>
    #include <cstdio>
    #include <cmath>
    #include <cstring>
    #include <string>
    #include <algorithm>
    int abs(int x) {
    if (x>0)
    return x;
    return -x;

    }
    using namespace std;
    int a[107],n;
    int main() {
    scanf("%d",&n);
    for (int i=n;i>-1;i--)
    scanf("%d",a+i);
    bool flag=0;
    for (int i=n;i>-1;i--) {
    if (a[i]==0)
    continue;
    if (flag) {
    if (a[i]>0)
    printf("+");
    }
    if (a[i]<0)
    printf("-");
    if ((abs(a[i]))>1)
    printf("%d",abs(a[i]));
    if (i!=0) {
    printf("x");
    if (i>1)
    printf("^%d",i);
    }
    flag=1;
    }
    if (abs(a[0])==1)
    printf("1");
    return 0;
    }

    • @ 2016-08-15 10:26:28

      <cmath>里就有abs(n)啊......

  • 0
    @ 2016-03-17 07:43:12

    #include<iostream>
    #include<algorithm>
    using namespace std;
    int n,a[100];
    int main()
    {
    freopen("p.in","r",stdin);
    freopen("p.out","w",stdout);
    cin>>n;
    for(int i=0;i<=n;i++)
    cin>>a[i];
    if(n==1) cout<<a[0]<<"x";
    else
    {
    if(abs(a[0])==1)
    {
    if(a[0]==1)
    cout<<"x^"<<n;
    if(a[0]==-1)
    cout<<"-x^"<<n;
    }
    else
    cout<<a[0]<<"x^"<<n;
    }
    for(int i=1;i<=n-2;i++)
    {
    if(a[i]>0) cout<<"+";
    if(a[i]==0) continue;
    if(abs(a[i])==1)
    {
    if(a[i]==1) cout<<"x^"<<n-i;
    if(a[i]==-1) cout<<"-x^"<<n-i;
    }
    else
    {
    cout<<a[i]<<"x^"<<n-i;
    }

    }

    if(n>2)
    {
    if(a[n-1]==1) cout<<"+x";
    if(a[n-1]!=1 && a[n-1]>0) cout<<"+"<<a[n-1]<<"x";
    if(a[n-1]<0) cout<<a[n-1]<<"x";
    }

    if(a[n]>0) cout<<"+"<<a[n];

    if(a[n]<0) cout<<a[n];
    return 0;

    }

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  • 0
    @ 2016-03-16 16:28:40

    #include<iostream>
    #include<algorithm>
    using namespace std;
    int n,a[100],i;
    int main()
    {
    freopen("p.in","r",stdin);
    freopen("p.out","w",stdout);
    cin>>n;
    for(i=0;i<=n;i++) cin>>a[i]; //读入数据

    for(i=0;i<=n;i++) //从第一个到最后一个
    {

    if(i==0)
    {
    if(a[i]==0)
    {
    continue;
    }
    else
    {
    if(abs(a[i])==1)
    {
    if(a[i]==1)
    {
    cout<<a[i]<<"x^"<<n;
    }
    if(a[i]==-1)
    {
    cout<<a[i]<<"x^"<<n;
    }
    }
    else
    {
    if(a[i]>0)
    {
    cout<<a[i]<<"x^"<<n;
    }
    if(a[i]<0)
    {
    cout<<a[i]<<"x^"<<n;
    }
    }
    }
    }

    //以上是处理第一项，证明已成功了。

    //以下处理第2项到最后第2项的程序，请参观
    if (i>0&&i<n)
    {

    if(a[i]==0)
    {
    continue;
    }
    else
    {
    if(abs(a[i])==1)
    {
    if(a[i]==1)
    {
    cout<<"+"<<"x^"<<n-i;
    }
    else
    {
    cout<<"x^"<<n-i;
    }
    }
    else
    {
    if(a[i]>0)
    {
    cout<<"+"<<a[i]<<"x^"<<n-i;
    }
    else
    {
    cout<<a[i]<<"x^"<<n-i;
    }
    }
    }
    }

    //以下是处理最后一个
    if(i==n)
    {
    if(a[i]==0)
    {
    continue;
    }
    else
    {
    if(a[i]>0)
    {
    cout<<"+"<<a[i];
    }
    if(a[i]<0)
    {
    cout<<a[i];
    }
    }
    }

    }

    return 0;
    }

    • @ 2016-05-23 12:53:54

      你够了。苏苏啊，这样连发两个题解真的好吗。。。

    • @ 2017-10-21 10:29:43

      嗯，和我的代码很像，不过我是pascal...

  • 0
    @ 2016-03-16 10:28:24

    #include<iostream>
    #include<algorithm>
    using namespace std;
    int n,a[100],i;
    int main()
    {
    cin>>n;
    for(int i=0;i<=n;i++)
    {
    cin>>a[i];
    if(i==0)
    {
    if(a[i]==0)
    {
    continue;
    }
    else
    {
    if(abs(a[i])==1)
    {
    if(a[i]==1)
    {
    cout<<a[i]<<"x^"<<n;
    }
    if(a[i]==-1)
    {
    cout<<"-"<<a[i]<<"x^"<<n;
    }
    }
    else
    {
    if(a[i]>0)
    {
    cout<<a[i]<<"x^"<<n;
    }
    if(a[i]<0)
    {
    cout<<"-"<<a[i]<<"x^"<<n;
    }
    }
    }
    }

    for(int i=1;i<n;i++)
    {
    if(a[i]==0)
    {
    continue;
    }
    else
    {
    if(abs(a[i])==1)
    {
    if(a[i]==1)
    {
    cout<<"+"<<"x^"<<n-i;
    }
    if(a[i]==-1)
    {
    cout<<"-"<<"x^"<<n-i;
    }
    }
    else
    {
    if(a[i]>0)
    {
    cout<<"+"<<a[i]<<"x^"<<n-i;
    }
    if(a[i]<0)
    {
    cout<<"-"<<a[i]<<"x^"<<n-i;
    }
    }
    }

    }
    if(i==n)
    {
    if(a[i]==0)
    {
    continue;
    }
    else
    {
    if(a[i]>0)
    {
    cout<<"+"<<a[i];
    }
    if(a[i]<0)
    {
    cout<<"-"<<a[i];
    }
    }
    }
    }
    return 0;
    }

  • 0
    @ 2015-10-24 18:49:50

    #include <cstdio>
    #include <algorithm>
    #include <iostream>
    #include <cmath>

    using namespace std;

    int i,j,k,l,n,m;

    int main()
    {
    freopen("poly.in","r",stdin);
    freopen("poly.out","w",stdout);
    cin >>n;
    cin >>m;j=1;
    if (m==0)
    {
    while (m==0 && j<=n)
    {
    j++;
    cin >>m;
    }
    if (m==-1) cout <<"-x^"<<n-j+1;
    else
    if (m==1) cout <<"+x^"<<n-j+1;
    else
    {
    if (m<0) cout <<"-"<<abs(m)<<"x^"<<n-j+1;
    else
    cout <<m<<"x^"<<n-j+1;
    }
    }
    else
    {
    if (m==-1) cout <<"-x^"<<n-j+1;
    else
    if (m==1) cout <<"x^"<<n;
    else
    {
    if (m<0) cout <<"-"<<abs(m)<<"x^"<<n;
    else
    cout <<m<<"x^"<<n;
    }
    }
    for (i=j+1;i<=n-1;i++)
    {
    cin >>m;
    if (m!=0)
    {
    if (m==-1) cout <<"-x^"<<n-i+1;
    else
    if (m==1) cout <<"+x^"<<n-i+1;
    else
    {
    if (m>0) cout <<"+";
    cout <<m<<"x^"<<n-i+1;
    }
    }
    }
    cin >>m;
    if (m!=0)
    {

    if (m==-1) cout <<"-x";
    else
    if (m==1) cout <<"+x";
    else
    {
    if (m>0) cout <<"+";
    cout <<m<<"x";
    }
    }
    cin >>m;
    if (m!=0)
    {
    if (m>0) cout <<"+";
    cout <<m;
    }
    }

  • 0
    @ 2015-02-12 16:12:33

    var a:array[1..1000]of longint;
    n,i,b:longint;
    begin
    readln(n);
    for i:=1 to n+1 do read(a[i]);
    if (a[1]<>0)and(a[1]<>1)and(a[1]<>-1) then write(a[1],'x^',n);
    case a[1] of
    1:write('x^',n);
    -1:write('-x^',n);
    end;
    b:=n-1;
    for i:=2 to n-1 do
    begin
    if a[i]=1 then write('+x^',b)
    else if a[i]=-1 then write('-x^',b)
    else if (a[i]>0) then write('+',a[i],'x^',b)
    else if (a[i]<0) then write('-',-a[i],'x^',b);
    b:=b-1;
    end;
    if a[n]=1 then write('+x') else if a[n]=-1 then write('-x') else if a[n]>1 then write('+',a[n],'x') else if a[n]<-1 then write(a[n],'x');
    if a[n+1]<>0 then if a[n+1]>0 then write('+',a[n+1]) else write(a[n+1]);
    end.

  • 0
    @ 2015-02-11 14:30:16

    var n,f,i:longint;a:array[-1..100000]of longint;

    begin

    readln(n);f:=n;

    for i:=n downto 0 do read(a[i]);

    while(a[f]=0)and(f>=0)do dec(f);

    if f<0 then begin writeln(0);halt;end;

    if f=0 then begin writeln(a[0]);halt;end;

    if a[f]=1 then write('x^',f);

    if a[f]=-1 then write('-x^',f);

    if(a[f]<>1)and(a[f]<>-1)then

    begin

    if f>1 then

    write(a[f],'x^',f)

    else write(a[f],'x');

    end;

    for i:=f-1 downto 2 do

    if a[i]<>0 then

    begin

    if a[i]>0 then write('+');

    if a[i]<>1 then

    begin

    if a[i]<>-1 then write(a[i]);

    if a[i]=-1 then write('-');

    end;

    write('x^',i);

    end;

    if f-1>=1 then

    if a[1]<>0 then

    begin

    if a[1]=1 then write('+x');

    if a[1]=-1 then write('-x');

    if(a[1]<>1)and(a[1]>0)then write('+');

    if(a[1]<>1)and(a[1]<>-1)then write(a[1],'x');

    end;

    if f-1>=0 then

    if a[0]<>0 then

    begin

    if a[0]>0 then write('+');

    writeln(a[0]);

    end;

    end.
    很多没想到，贡献了很多分母啊!正确率掉了2%啊

  • 0
    @ 2014-07-07 19:28:30

    #include <stdio.h>
    #include <math.h>
    int main(){
    int num;
    int i;
    int arr[100];
    scanf("%d",&num);
    for(i=num;i>=0;i--){
    scanf("%d",&arr[i]);
    }
    for(i=num;i>=0;i--){
    if(arr[i]==0) continue;
    if(i!=num){
    if(arr[i]>0) printf("+");
    }
    if(arr[i]<0) printf("-");
    if(abs(arr[i])!=1 || i==0) printf("%d",abs(arr[i]));
    if(i>0){
    printf("x");
    if(i>1) printf("^%d",i);
    }
    }
    printf("\n");
    return 0;
    }

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