信息竞赛进阶指南--字符串哈希

char s[1000010];
unsigned long long f[1000010], p[1000010];
int n, q;
int main() {
	scanf("%s", s + 1);
	n = strlen(s + 1);
	cin >> q;
	p[0] = 1; // 131^0
	for (int i = 1; i <= n; i++) {
		f[i] = f[i-1] * 131 + (s[i]-'a'+1); // hash of 1~i
		p[i] = p[i-1] * 131; // 131^i
	}
	for (int i = 1; i <= q; i++) {
		int l1, r1, l2, r2;
		scanf("%d%d%d%d", &l1, &r1, &l2, &r2);
		if (f[r1] - f[l1-1] * p[r1-l1+1] == // hash of l1~r1
			f[r2] - f[l2-1] * p[r2-l2+1]) { // hash of l2~r2
			puts("Yes");
		} else {
			puts("No");
		}
	}
}