Submission #975913

#	Time	Username	Problem	Language	Result	Execution time	Memory
975913		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include <bits/stdc++.h>
#define int long long
using namespace std;

int digitcalc(int n){
	int ret = 0;
	while(n!=0){
		ret += n%10;
		n/=10;
	}
	return ret;
}

signed main (){

	int q; cin >> q;
	for(int i = 0;i<q;i++){
		int l,r; cin >> l >> r;
		int prefr = 45*(r/9) + ((r%9) * ((r%9) + 1))/2;
		l--;
		int prefl = 45*(l/9) + ((l%9) * ((l%9) + 1))/2;
		cout << prefr - prefl << endl;
	}
	
	return 0;
}

• Subtask 1: 50 / 50