Submission #903976

#	Time	Username	Problem	Language	Result	Execution time	Memory
903976		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include<bits/stdc++.h>
using namespace std;
long long calc(long long n){
  long long cnt = n / 9;
  long long res = cnt * 45 + (n % 9) * (n % 9 + 1) / 2;
  return res;
}
int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int q;
  cin >> q;
  while(q--){
  	long long l, r;
  	cin >> l >> r;
  	cout << calc(r) - calc(l - 1) << '\n';
  }
}

• Subtask 1: 50 / 50