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纯水题。。。。
#include <iostream>
#include <vector>
#include <string>
#include <math.h>
#include <iomanip>
#include <stdlib.h>
using namespace std;

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