题解 - Vijos

0

呜呜呜，第一次写这么多的代码，竟然re加wa，好受伤

#include<iostream>
#include<algorithm>
#include<cstdio>
#include<vector>
#include<queue>
#include<map>
#include<iomanip>
#include<cmath>
#include<cstring>
#define maxa 200+10
#define FOR(i,x,y) for(i=x;i<=y;++i)
using namespace std;
void f(int x,int y,char ch,int z)
{
    switch(ch)
    {
    case '+': x = y+z;
        break;
        case '-':x = y-z;
        break;
        case '*': x = y*z;
        break;
        case '/': x = y/z;
        break;
        case '^': x = pow(y,z);
        break;
    }
}
void swap1(int x,int y)
{
    int t = x;
    x = y;
    y = t;
}
int main()
{
    string s;
    int n,p,q;
    cin>>s;
    cin>>n;
    int len=  s.length();
    p = q = 0;
    int i,j;
    FOR(i,0,len-1)
    if(s[i]!='/')
    {
        p = p*10;
        p+=s[i]-'0';
    }
    else
        break;
    FOR(j,i+1,len-1)
    {
        q = q*10;
        q+=s[j]-'0';
    }
    int z,k;
    FOR(i,1,n)
    {
        cin>>s;
        int len = s.length();
        if(s=="swap")
        {
            swap1(p,q);
        }
        else{
        if(s.substr(0,5)=="feizi")
        {
            char ch = s[11];
            if(s.substr(6,5)=="feizi")
            {
                if(s.substr(12,len-12)=="feizi")
                    z = p;
                else if(s.substr(12,len-12)=="feimu")
                    z = q;
                else
                {
                    z = 0;
                    FOR(k,12,len-1)
                    {
                        z = z*10;
                        z+=s[k]-'0';
                    }
                }
                f(p,p,ch,z);
            }
            else
            {
                if(s.substr(12,len-12)=="feizi")
                    z = p;
                else if(s.substr(12,len-12)=="feimu")
                    z = q;
                else
                {
                    z = 0;
                    FOR(k,12,len-1)
                    {
                        z = z*10;
                        z+=s[k]-'0';
                    }
                }
                f(p,q,ch,z);
            }
        }
        else
        {
            char ch  = s[11];
           if(s.substr(6,5)=="feizi")
            {
                if(s.substr(12,len-12)=="feizi")
                    z = p;
                else if(s.substr(12,len-12)=="feimu")
                    z = q;
                else
                {
                    z = 0;
                    FOR(k,12,len-1)
                    {
                        z = z*10;
                        z+=s[k]-'0';
                    }
                }
                f(q,p,ch,z);
            }
            else
            {
                if(s.substr(12,len-12)=="feizi")
                    z = p;
                else if(s.substr(12,len-12)=="feimu")
                    z = q;
                else
                {
                    z = 0;
                    FOR(k,12,len-1)
                    {
                        z = z*10;
                        z+=s[k]-'0';
                    }
                }
                f(q,q,ch,z);
            }
        }
        }
    }
    cout<<p<<"/"<<q<<endl;
    return 0;
}

0

dcy11011 LV 10 @ 8 年前

python大法好,滑稽
python fenzi,fenmu=raw_input().split('/'); fenzi=int(fenzi);fenmu=int(fenmu); n=int(raw_input()); comm=""; for i in range(0,n): s=raw_input(); s=s.replace("^","**"); s=s.replace("swap","fenzi+=fenmu;fenmu=fenzi-fenmu;fenzi-=fenmu"); s=s+";\nfenzi=abs(fenzi);fenmu=abs(fenmu);"; comm=comm+s; exec(comm); if fenmu==0: print "Error"; else : print "{}/{}".format(fenzi,fenmu);