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답안 #976087

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
976087 2024-05-06T07:21:16 Z vjudge1 Trol (COCI19_trol) C++17
50 / 50
 1 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;
#define ios ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long

// 1-9=45
// 1-18=90

ll l,r;
ll solve(ll n){
    ll count,x,idx,sum=0;
    idx=n%9+1;
    while(idx--)sum+=idx;
    
    count=n/9;
    x= 45*count+sum;
    return x;   
}

int main(){
    ios
    ll t; cin >> t;
    while (t--){
        cin >> l >> r;
        cout << solve(r)-solve(l-1) << endl;
    }


    return 0;
}

Subtask #1
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct