POJ 1658 Eva's Problem

#include <iostream>
#include <cstdio>
#include <cstring>
#define REP(i, s, n) for(int i = s; i <= n; i ++)
#define REP_(i, s, n) for(int i = n; i >= s; i --)

using namespace std;

int main(){
    int T, a, b, c, d;
    scanf("%d", &T);
    while(T --){
        scanf("%d%d%d%d", &a, &b, &c, &d);
        if(d - c == c - b) printf("%d %d %d %d %d\n", a, b, c, d, d + (d - c));
        else if(d / c == c / b) printf("%d %d %d %d %d\n", a, b, c, d, d * (d / c));
    }
    return 0;
}