Submission #975622

#	Time	Username	Problem	Language	Result	Execution time	Memory
975622		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	352 KiB

trol

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

#define ll long long

int main(){
    ll q; cin >> q;
    while(q--){
        ll l , r; cin >> l >> r;
        ll tot1 = r/9, sisa1 = r%9;
        ll sum1 = tot1 * 45 + ((sisa1*(sisa1+1))/2);

        l--;
        ll tot2 = l/9, sisa2 = l%9;
        ll sum2 = tot2 * 45 + ((sisa2*(sisa2+1))/2);

        cout << sum1-sum2 << '\n';
    }
}

• Subtask 1: 50 / 50