제출 #886698

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
886698		vjudge1	Doktor (COCI17_doktor)	C++17	0 / 100	2 ms	348 KiB

doktor

#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

//#define ONLINE_JUDGE
void solve() {
    int n;
    cin >> n;

    vector <int> a(n +1);
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }

    auto rev = [&](int l, int r) -> void {
        while(l <= r) {
            swap(a[l], a[r]);
            r--;
            l++;
        }

        return;
    };
    
    array <int, 3> ans = {-1, 0, 0};
    for(int l = 1; l <= n; l++) {
        for(int r = l; r <= n; r++) {
            rev(l, r);

            int cnt = 0;
            for(int i = 1; i <= n; i++) {
                cnt += (a[i] == i);
            }

            rev(l, r);

            if(cnt > ans[0]) {
                ans = {cnt, a[l], a[r]};
            }
        }
    }

    cout << ans[1] << " " << ans[2];

    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; //cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

doktor.cpp: In function 'int main()':
doktor.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen("in.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
doktor.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen("out.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
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• Subtask 10: 0 / 10