Codeforces 653A Bear and Three Balls

题目:http://codeforces.com/problemset/problem/653/A

代码:

#include<stdio.h>
#include<string.h>
#include<map>

using namespace std;
int book[10005]={0};
int main()
{
    for(int i=0;i<=10005;i++)
        book[i]=0;
    int n;
    scanf("%d",&n);
    for(int i=0; i<n; i++)
    {
        int t;
        scanf("%d",&t);
        book[t]++;
    }
    int flag=0;
    for(int i=1; i<=1000; i++)          //     i<=1000 book【2000】也满足条件
    {
        if(book[i]&&book[i+1]&&book[i+2])
        {
            printf("YES");
            return 0;
        }
    }
        printf("NO");
    return 0;
}

分析:

离梦想好遥远。从头再来吧。

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