考点:哈希,字符串
C++ 代码
#include<iostream>
#include<cstring>
using namespace std;
typedef unsigned long long ULL;
const int N=1000010,base=131;
char str[N];
ULL h[N],p[N];
ULL get(int l,int r)
{
return h[r]-h[l-1]*p[r-l+1];
}
int main()
{
scanf("%s",str+1);
int n=strlen(str+1);//求字符串长度
p[0]=1;
for(int i=1;i<=n;i++)
{
h[i]=h[i-1]*base+str[i]-'a'+1;
p[i]=p[i-1]*base; //p[]存放131^0,131^1,131^2,……
}
int m;
cin>>m;
while(m--)
{
int l1,r1,l2,r2;
cin>>l1>>r1>>l2>>r2;
if(get(l1,r1)==get(l2,r2))
cout<<"Yes"<<endl;
else
cout<<"No"<<endl;
}
return 0;
}