代码

#include <stdio.h>
#include <string.h>

int a[100010], b[100010], result[100010];

int main() {
    int len_a, len_b;
    scanf("%d%d", &len_a, &len_b);
    len_a++;
    len_b++;
    for (int i = 0; i < len_a; ++i) scanf("%d", &a[i]);
    for (int i = 0; i < len_b; ++i) scanf("%d", &b[i]);
    
    int result_len = len_a + len_b - 1;
    memset(result, 0, sizeof(int) * result_len);
    for (int i = 0; i < len_a; ++i) {
        for (int j = 0; j < len_b; ++j) {
            result[i + j] += a[i] * b[j];
        }
    }
    for (int i = 0; i < result_len; ++i) printf("%d ", result[i]);
    return 0;
}

评测结果