uri online judge problem 1007 solution c programming

UIR online judge problem 1007 solution c            
 programming

code : 

#include<stdio.h>
int main()
{
    int A,B,C,D,DIFERENCA;
    scanf("%d %d %d %d",&A,&B,&C,&D);
    DIFERENCA=(A*B-C*D);
    printf("DIFERENCA = %d\n",DIFERENCA);
    return 0;

}


output :