Vector dot product computation T1097-

#include <stdio.h>
#define MAXN 1005
int num[2][MAXN];
int main(void)
{
    int n, sum = 0;
    scanf("%d",&n);
    for (int i = 0; i < 2; i++)
        for (int j = 0; j < n; j++)
            scanf("%d", &num[i][j]);  
    for (int j = 0; j < n; j++)
           sum += num[0][j] * num[1][j];
    printf("%d",sum);
    return 0;
}