代码

#include <bits/stdc++.h>

const int n = 2000000;
int a[n], b[n];

int main() {
	srand(233333);
	for (int i = 0; i < n; ++i) a[i] = rand();
	for (int i = 0; i < n; ++i) b[i] = rand();
	for (int i = 0; i < n; ++i) a[i] = a[i]*b[i];
}

评测结果