Submission #974650

#	Time	Username	Problem	Language	Result	Execution time	Memory
974650		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include "bits/stdc++.h"
using namespace std;
#define int long long
#define MOD 1000000007
#define pii pair<int , int>
#define sz size
#define pb push_back
#define se second
#define fi first
const int INF = 1e18;

signed main(){

	int q;	cin >> q;
	while(q--){
		int l , r;	cin >> l >> r;
		if(l == 1){
			cout << (r/9)*45 + ((r%9) * ((r%9)+1))/2 << '\n';
		}	
		else{
			int right =  (r/9)*45 + ((r%9) * ((r%9)+1))/2;
			l--;
			int left = (l/9)*45 + ((l%9) * ((l%9)+1))/2;
			cout << right - left << '\n';
		}
	}

}

• Subtask 1: 50 / 50