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/***
Md. Namzul Hasan
Shahjalal University of Science & Technology,Sylhet.
hasan08sust@gmail.com
***/
#include<bits/stdc++.h>
using namespace std ;
typedef long long ll ;
typedef int in ;
typedef unsigned long long ull ;
const double pi = 2*acos(0) ;
#define maxi 40000
#define pf printf
#define sc scanf
#define pb push_back
#define MEM(x,y) (memset((x),(y),sizeof(x)))
#define MIN(x,y) ((x) < (y) ? (x) : (y))
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#define load(array,size) for(int i=0 ; i<size ; i++) cin>>array[i] ;
#define new_line pf("\n")
#define clear_data(array) memset(array,0,sizeof(array))
#define highest_int 2147483647
int main()
{
string str ;
int i ,cnt =1 , flag =0 ,l=0;
//ch = str[0] ;
cin>>str ;
for(i=1 ; i<str.size() ; i++)
{
if(str[i]==str[i-1])
{
cnt++ ;
if(cnt==7)
{
pf("YES") ;
l =1 ;
break ;
}
}
else
cnt =1 ;
}
if(cnt<7)
pf("NO") ;
return 0;
}
/***
Md. Namzul Hasan
Shahjalal University of Science & Technology,Sylhet.
hasan08sust@gmail.com
***/
#include<bits/stdc++.h>
using namespace std ;
typedef long long ll ;
typedef int in ;
typedef unsigned long long ull ;
const double pi = 2*acos(0) ;
#define maxi 40000
#define pf printf
#define sc scanf
#define pb push_back
#define MEM(x,y) (memset((x),(y),sizeof(x)))
#define MIN(x,y) ((x) < (y) ? (x) : (y))
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#define load(array,size) for(int i=0 ; i<size ; i++) cin>>array[i] ;
#define new_line pf("\n")
#define clear_data(array) memset(array,0,sizeof(array))
#define highest_int 2147483647
int main()
{
string str ;
int i ,cnt =1 , flag =0 ,l=0;
//ch = str[0] ;
cin>>str ;
for(i=1 ; i<str.size() ; i++)
{
if(str[i]==str[i-1])
{
cnt++ ;
if(cnt==7)
{
pf("YES") ;
l =1 ;
break ;
}
}
else
cnt =1 ;
}
if(cnt<7)
pf("NO") ;
return 0;
}
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