제출 #381342

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
381342		AdiZer0	Doktor (COCI17_doktor)	C++17	50 / 100	1092 ms	2284 KiB

doktor

#include <bits/stdc++.h>

#define pb push_back
#define whole(x) x.begin(), x.end()
#define sz(x) (int)x.size()

using namespace std;

typedef long long ll;
typedef long double ld;

const int N = (int)5e5 + 7;
const int INF = (int)1e9 + 7;
const ll linf = (ll)1e18 + 1;

int a[N];
int main() {
    int n; scanf ("%d", &n);
    int ans = 0, ansL = -1, ansR = -1;
    for (int i = 1; i <= n; ++i) { 
        scanf ("%d", a + i);
        if (a[i] == i) ++ans;
        ansL = ansR = a[i];
    }
    for (int i = 1; i <= n; ++i) {
        if (a[i] == i) continue;
        int l = i, r = a[i];
        if (l > r) swap(l, r);
        int cur = 0;
        while (l <= r) {
            if (l == a[r]) ++cur;
            if (l != r && r == a[l]) ++cur;
            l++, r--;
        }   
        if (cur > ans) { 
            ans = cur;
            if (a[i] < i) ansL = a[a[i]], ansR = a[i];
            else ansL = a[i], ansR = a[a[i]];
        } 
    }
    printf ("%d %d\n", ansL, ansR);
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

doktor.cpp: In function 'int main()':
doktor.cpp:18:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   18 |     int n; scanf ("%d", &n);
      |            ~~~~~~^~~~~~~~~~
doktor.cpp:21:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |         scanf ("%d", a + i);
      |         ~~~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10