So Water！！！！！！！！！！！！

#include<iostream>
using namespace std;
int main()
{
long long n,a,m,t=0;
cin>>m>>n;
for(int i=1;i<=n;i++)
{
a=m/2;
t+=a;
m=m-a;
}
cout<<t;
}

刷道模拟冷静一下
cpp
#include<cstdio>
using namespace std;
int main()
{
int n,m,sum=0;
scanf("%d%d",&m,&n);
while(n)
{
n--;
sum+=m/2;
m-=m/2;
}
printf("%d",sum);
return 0;
}


水炸了

var
a,b,c,d,i:longint;
begin
readln(a,b);
for i:=1 to b do
begin
c:=a div 2;
a:=a-c;
d:=d+c;
end;
writeln(d);
end.

public class y {

public static void main(String[] args) {
Scanner sc = new Scanner(System.in );
String line = sc.nextLine();
String[] list=line.split(" ");
int sum= Integer.parseInt(list[0]) ;
int times= Integer.parseInt(list[1]) ;
int outman=0;
for (int i = 0; i < times; i++) {
outman+=sum/2;
sum=sum-sum/2;

}
System.out.println("outman");

}

}

还能再水一点吗
```c

#include<stdio.h>
int main()
{
int m,n;
int count = 0,sum = 0;
scanf("%d%d",&m,&n);
while(1)
{
sum += m/2;
m = m-m/2;
count++;
if(count == n) break;
}
printf("%d\n",sum);
return 0;
}

#include<iostream>
int main()
{
    int m,n,a=0;
    for(std::cin>>m>>n;n--;m-=m/2)a+=m/2;
    std::cout<<a;
}

program P1785;
var
  m,n,ans,i:longint;
begin
  readln(m,n);
  ans:=0;
  for i:=1 to n do
    begin
      ans:=ans+(m div 2);
      m:=m-(m div 2);
    end;
  writeln(ans);
end.

记录信息
评测状态    Accepted
题目  P1785 同学排序
递交时间    2016-07-04 13:37:05
代码语言    C++
评测机 ShadowShore
消耗时间    30 ms
消耗内存    504 KiB
评测时间    2016-07-04 13:37:05
评测结果
编译成功

测试数据 #0: Accepted, time = 0 ms, mem = 500 KiB, score = 20
测试数据 #1: Accepted, time = 0 ms, mem = 504 KiB, score = 20
测试数据 #2: Accepted, time = 15 ms, mem = 504 KiB, score = 20
测试数据 #3: Accepted, time = 0 ms, mem = 500 KiB, score = 20
测试数据 #4: Accepted, time = 15 ms, mem = 504 KiB, score = 20
Accepted, time = 30 ms, mem = 504 KiB, score = 100
代码
#include<stdio.h>
int main() {
  int n,m,ans=0;
  scanf("%d %d",&n,&m);
  for (int i=1;i<=m;i++) {
    ans+=n/2;
    n-=n/2;
  }
  printf("%d",ans);
  return 0;
}

var
n,m,ans,sum:longint;
begin
readln(n,m);
ans:=0;
sum:=0;
repeat
sum:=sum+n div 2;
n:=n-(n div 2);
inc(ans);
until ans=m;
writeln(sum);
end.

水题啦
var
m,n,s,i:longint;
begin
readln(m,n);
s:=0;
for i:=1 to n do
begin
s:=m div 2+s;
m:=m div 2+m mod 2;
end;
write(s);
end.

水题，还有17RP
#include<iostream>
using namespace std;
int main()
{
long long a,b,n,t=0;
cin>>n>>a;
for (int i=1;i<=a;i++)
{
b=n/2;
t+=b;
n=n-b;
}
cout<<t;
}

program xie;
var
m,n,p,i,j,b,c,k:longint;
a:array[1..100000]of longint;
begin
readln(m,n);
c:=0; p:=1;
for i:=1 to m do
begin
a[i]:=i;
if a[i] mod 2=0 then a[i]:=0;
end;
k:=n-1;
for b:=1 to k do
begin
p:=1;
for i:=1 to m do
begin
if a[i]<>0 then begin a[i]:=p; inc(p); end;
if a[i] mod 2=0 then a[i]:=0;
end;
end;
for b:=1 to m do
if a[b]=0 then inc(c);
writeln(c);
end.
好水的题目，连排序都几乎不要

编译成功

测试数据 #0: Accepted, time = 0 ms, mem = 516 KiB, score = 20
测试数据 #1: Accepted, time = 0 ms, mem = 520 KiB, score = 20
测试数据 #2: Accepted, time = 0 ms, mem = 516 KiB, score = 20
测试数据 #3: Accepted, time = 0 ms, mem = 516 KiB, score = 20
测试数据 #4: Accepted, time = 15 ms, mem = 516 KiB, score = 20
Accepted, time = 15 ms, mem = 520 KiB, score = 100
代码
#include<iostream>
#include<math.h>
#include<fstream>
using namespace std;
int main()
{
int n,m,k=0,b;
cin>>m>>n;
for(int i=1;i<=n;i++)
{
b=m;
m=m/2;
k=k+m;
m=b-m;
}
cout<<k<<endl;
return 0;
}

这题目真心水……话说回来和排序有关吗？

###Block Code

var
n,k,i,x,ans:longint;
begin
readln(n,k);
ans:=0;
for i:=1 to k do
begin
x:=n div 2;
ans:=ans+x;
n:=n-x;
end;
writeln(ans);
end.

#include <iostream>
using namespace std;
int main (){
int n,m,ans=0;
cin>>m>>n;
while (n--){
ans+=m/2;
m=(m+1)/2;
}
cout<<ans;
return 0;
}

#include <stdio.h>
int main(){
int studentNum,time,rest;
scanf("%d %d",&studentNum,&time);
rest=studentNum;
while(time>=1){
rest=(rest+1)/2;
times--;
}
printf("%d\n",studentNum-rest);
return 0;
}

好水的题，数据范围应该调到m,n<=10000000

这样也够短，不知道可不可以
var n,m:longint;
begin
readln(m,n);
if m mod (1 shl n)=0 then writeln(m-m shr n) else writeln(m-m shr n-1);
end.

http://user.qzone.qq.com/969519450/2

Vijos 题解：http://hi.baidu.com/umule/item/2c997f8ed9600fdae596e017
有疑问请留言 共同进步

1分钟秒杀

记录信息
评测状态 Accepted
题目 P1785 同学排序
递交时间 2013-11-06 18:09:49
代码语言 C++
评测机 上海红茶馆
消耗时间 15 ms
消耗内存 568 KiB
评测时间 2013-11-06 18:09:50
评测结果

编译成功

测试数据 #0: Accepted, time = 15 ms, mem = 564 KiB, score = 20

测试数据 #1: Accepted, time = 0 ms, mem = 564 KiB, score = 20

测试数据 #2: Accepted, time = 0 ms, mem = 568 KiB, score = 20

测试数据 #3: Accepted, time = 0 ms, mem = 564 KiB, score = 20

测试数据 #4: Accepted, time = 0 ms, mem = 564 KiB, score = 20

Accepted, time = 15 ms, mem = 568 KiB, score = 100
代码

#include <stdio.h>
#include <iostream>
#include <cstdio>
#include <cstring>
#include <math.h>
#include <cstdlib>

using namespace std;

int m , n;
int M;

int main()
{
while( scanf( "%d %d" , &m , &n ) != EOF )
{
M = m;
while( n-- )
if( m % 2 == 0 )
m /= 2;
else
m = ( m + 1 ) / 2;
cout << M - m << endl;
}
return 0;
}