UVa 10935 Throwing cards away I【队列】

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<vector>
#include<queue>
using namespace std;

queue<int>q;

int main()
{
int i,j,n,ans,a,b;
while(scanf("%d",&n)!=EOF&&n)
{
while(!q.empty()) q.pop();
for(i=1;i<=n;i++)
q.push(i);
printf("Discarded cards:");
while(q.size()!=1)
{
b=q.front();q.pop();
if(q.size()!=1) printf(" %d,",b);
else printf(" %d",b);
a=q.front();q.pop();
q.push(a);
}
printf("\n");
printf("Remaining card: %d\n",q.front());
}
}