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spongewxy

于 2015-05-21 16:42:02 发布

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分类专栏： Codeforces

本文链接：https://blog.youkuaiyun.com/XDU_PYL/article/details/45893949

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#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

int main() {

    string str;
    bool flag = false;
    cin >> str;
    int len = str.length();
    for(int i = 0; i + 6 < len; ++i) {
        int cnt = 0;
        for(int j = i; j <= i + 6; ++j) {
            if(str[i] == str[j]) {
                cnt++;
            }
        }
        if(cnt == 7) {
            flag = true;
            break;
        }
    }
    if(flag) cout << "YES" << endl;
    else cout << "NO" << endl;
    return 0;
}