我想大概是範圍太小吧

試試看

#include <stdio.h>

int main()
{
    int time = 0, a,x;
    long long int b, c;
    while(scanf("%d", &time) != EOF)
    {
        for(x = 0 ; x < time ; x++)
        {
            scanf("%d %lld %lld", &a, &b, &c);
            if(a == 1)
                printf("%lld\n", b+c);
            if(a == 2)
                printf("%lld\n", b-c);
            if(a == 3)
                printf("%lld\n", b*c);
            if(a == 4)
                printf("%lld\n", b/c);

        }
    }
    return 0;
}