138. 兔子与兔子

#include <iostream>
#include <string.h>

using namespace std;

typedef unsigned long long ULL;
const int N = 1000010, p = 131;

char str[N];  // 1-indexed
ULL power[N], h[N];

void init(int n) {
    power[0] = 1;
    for (int i = 1; i <= n; i ++ )
    {
        power[i] = power[i - 1] * p;
        h[i] = h[i - 1] * p + str[i] - ‘a‘;

    }
}

ULL get(int l, int r) {
    return h[r] - h[l - 1] * power[r - l + 1];
}

int main()
{
    scanf("%s", str + 1);
    int n = strlen(str + 1);
    init(n);

    int m;
    scanf("%d", &m);
    while (m -- )
    {
        int l1, r1, l2, r2;
        scanf("%d%d%d%d", &l1, &r1, &l2, &r2);
        if (get(l1, r1) == get(l2, r2)) puts("Yes");
        else puts("No");
    }

    return 0;
}