Submission #976866

#	Time	Username	Problem	Language	Result	Execution time	Memory
976866		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

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

signed main(){
    int q;
    cin >> q;
    int a[] = {0, 1, 3, 6, 10, 15, 21, 28, 36, 45};
    while(q--){
        int l, r;
        cin >> l >> r;

        int kanan = (r / 9 * 45) + a[r%9];
        l--;
        int kiri = (l / 9 * 45) + a[l%9];

        cout << kanan - kiri << endl; 
    }
}

• Subtask 1: 50 / 50