提出 #20149946

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ソースコード 拡げる

#include <iostream>
#include <vector>
#include <cmath>

int main(){
  int T;
  std::cin >> T;
  std::vector<unsigned long> L(T,0);
  std::vector<unsigned long> R(T,0);

  for(int i = 0; i < T; ++i){
    std::cin >> L[i] >> R[i];
  }
  for(int i = 0; i < T; ++i){
    if(R[i] < 2 * L[i]){
      std::cout << 0 << std::endl;
    }
    else{
      if(R[i] % 2 == 0){
        unsigned long ans = (R[i] + 1 - 2 * L[i]) * ((R[i] + 2 - 2 * L[i]) / 2);
        std::cout << ans << std::endl;
      }
      else{
        unsigned long ans = ((R[i] + 1 - 2 * L[i])/2) * (R[i] + 2 - 2 * L[i]);
        std::cout << ans << std::endl;
      }
    }
  }
  return 0;
}

提出情報

ジャッジ結果