codeforces 96A (implementation, strings)

http://codeforces.com/problemset/problem/96/A

生词:
没有

题面:
太水,不想说。

// codeforces
// 96A
// implementation, strings
#include 
#include 
using namespace std;
int main() {
    string s;
    while (cin >> s) {
        bool f = false;
        int len = (int)s.length();
        int cnt = 1;
        for (int i = 1; i < len; ++i) {
            if (s.at(i) == s.at(i - 1))
                cnt++;
            else
                cnt = 1;
            if (cnt == 7) {
                f = true;
                break;
            }
        }
        cout << (f ? "YES" : "NO") << endl;
    }
    return 0;
}

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