http://codeforces.com/contest/96
A
1 #include<bits/stdc++.h> 2 using namespace std; 3 #define lson l,mid,rt<<1 4 #define rson mid+1,r,rt<<1|1 5 #define sqr(x) ((x)*(x)) 6 #define pb push_back 7 #define eb emplace_back 8 #define maxn 13000005 9 #define eps 1e-8 10 #define pi acos(-1.0) 11 #define rep(k,i,j) for(int k=i;k<j;k++) 12 typedef long long ll; 13 typedef pair<int,int> pii; 14 typedef pair<char,int> pci; 15 typedef pair<pair<int,string>,pii> ppp; 16 typedef unsigned long long ull; 17 const long long MOD=1e9+7; 18 /*#ifndef ONLINE_JUDGE 19 freopen("1.txt","r",stdin); 20 #endif */ 21 22 23 24 int main(){ 25 #ifndef ONLINE_JUDGE 26 // freopen("1.txt","r",stdin); 27 #endif 28 std::ios::sync_with_stdio(false); 29 string str; 30 cin>>str; 31 int co=1; 32 vector<int>ve; 33 for(int i=1;i<str.length();i++){ 34 if(str[i]!=str[i-1]){ 35 ve.pb(co); 36 co=1; 37 } 38 else{ 39 co++; 40 } 41 } 42 ve.pb(co); 43 for(int i=0;i<ve.size();i++){ 44 if(ve[i]>=7) {cout<<"YES"<<endl;return 0;} 45 } 46 cout<<"NO"<<endl; 47 }