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Dec 10th, 2016
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C++ 0.44 KB | None | 0 0
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. long long a, b, c, d;
  4. long long x, y, g, h;
  5. long long pierwszy_rzad;
  6. long long suma;
  7. long long z;
  8.  
  9. int main ()
  10. {
  11.     scanf("%lld%lld%lld%lld", &a, &b, &c, &d);
  12.    
  13.     x=a+b;
  14.     y=c+d;
  15.    
  16.     h=c-a+1;
  17.     g=d-b+1;
  18.    
  19.     pierwszy_rzad=x*h;
  20.     pierwszy_rzad+=h*(h-1)/2;
  21.    
  22.     pierwszy_rzad*=g;
  23.     suma=pierwszy_rzad;
  24.    
  25.     //printf("%d", pierwszy_rzad);
  26.    
  27.     suma+=h*(g*(g-1)/2);
  28.    
  29.     printf("%lld", suma);
  30. }
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