题目链接：字符串哈希
文章来源地址https://www.toymoban.com/news/detail-675475.html
#include <iostream>
using namespace std;
typedef unsigned long long ULL;
const int N = 100010, P = 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()
{
int n, m;
cin >> n >> m >> str + 1;
p[0] = 1;
for(int i = 1; i <= n; i ++)
{
p[i] = p[i - 1] * P;
h[i] = h[i - 1] * P + str[i];
}
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;
}
文章来源：https://www.toymoban.com/news/detail-675475.html
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