POJ.1552 Doubles(水)

POJ.1552 Doubles(水)

题意分析

暴力

代码总览

#include <cstdio>
#include <stdio.h>
#define nmax 100
using namespace std;
int a[nmax];
int n;
int main()
{
    //freopen("in.txt","r",stdin);
    while(true){
        int t;
        scanf("%d",&t);
        if(t == -1) break;
        if(t == 0){
            printf("0
");
            continue;
        }else{
            int cnt = 0;
            a[cnt++] =t;
            while(scanf("%d",&t) && t!= 0){
                a[cnt++] = t;
            }
            int ans = 0;
            for(int i = 0; i<cnt;++i){
                for(int j = 0; j<cnt;++j){
                    if(i == j) continue;
                    else{
                        if(a[j] == 2* a[i]) ans++;
                    }
                }
            }
            printf("%d
",ans);
        }
    }
    return 0;
}