Submission #1248608

#	Time	Username	Problem	Language	Result	Execution time	Memory
1248608		hayyy	Trol (COCI19_trol)	C++20	10 / 50	0 ms	328 KiB

trol

#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

int balik(int K, int F = 0) {
  while (K > 0) {
  F += K % 10;
  K /= 10;
  }
  if (F > 9) return balik(F);
  else return F;
}

int main() {
  int Hai;
  int Dar;
  int N;
  cin >> N;
  vector<int> A(N);
  vector<int> B(N);
  for (int i = 1; i <= N; i++) {
    cin >> A[i] >> B[i];
    Hai = balik(A[i]) - 1;
    Dar = balik(B[i]);
    int H = Hai*(Hai + 1)/2;
    int D = Dar*(Dar + 1)/2;
    cout << D - H << endl;
  }
  
}

// output 
// 15
// 3

• Subtask 1: 10 / 50