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답안 #152378

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
152378 2019-09-07T19:58:05 Z Leonardo_Paes Uzastopni (COCI17_uzastopni) C++11
80 / 80
 28 ms 380 KB 
#include <bits/stdc++.h>

using namespace std;

long long sum(long long k){
    return k*(k+1LL)>>1LL;
}

int main(){
    ios_base::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);

    long long n;

    cin >> n;

    for(int i=2; i<=min(n, 200000LL); i++){
        long long ini=1, meio, fim=n, ans=-1LL;

        while(ini<=fim){
            meio = (ini+fim)>>1LL;
            if((meio-i>=0LL) and (sum(meio)-sum(meio-i))>=n){
                fim=meio-1LL;
                ans=meio;
            }
            else{
                ini=meio+1LL;
            }
        }

        if((ans-i>=0LL) and (sum(ans)-sum(ans-i))==n){
            cout << ans-i+1LL << " " << ans << "\n";
        }
    }

    return 0;
}

Subtask #1
80.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 9 ms 376 KB Output is correct
5 Correct 17 ms 376 KB Output is correct
6 Correct 20 ms 376 KB Output is correct
7 Correct 22 ms 376 KB Output is correct
8 Correct 24 ms 376 KB Output is correct
9 Correct 27 ms 380 KB Output is correct
10 Correct 28 ms 380 KB Output is correct