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Submission #235136

# Submission time Handle Problem Language Result Execution time Memory
235136 2020-05-27T07:13:20 Z NONAME Doktor (COCI17_doktor) C++17
60 / 100
 1000 ms 4288 KB 
#include <bits/stdc++.h>
#define N 5 * 100500
using namespace std;

int n, pf[N], a[N], ans, al = 0, ar = 0;

int main() {
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
		a[i]--;
		pf[i] = (i - 1 < 0) ? 0 : pf[i - 1];
		
		pf[i] += (a[i] == i);	
	}
	
	for (int i = 0; i < n; i++) {	
		int l = i, r = a[i];
		
		if (l > r)
			swap(l, r);
			
		int cur = ((l - 1 < 0) ? 0 : pf[l - 1]) + (pf[n - 1] - pf[r]);
		
		while (l < r) {
			cur += (a[l] == r);
			cur += (a[r] == l);
			
			l++, r--;	
		}
		
		if (l == r && a[l] == l)
			cur++;
			
		if (cur > ans) {
			ans = cur;
			al = i;
			ar = a[i];
		}
	}
	
	if (al > ar)
		swap(al, ar);
	
	cout << a[al] + 1 << ' ' << a[ar] + 1;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 384 KB Output is correct
2 Correct 6 ms 384 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 384 KB Output is correct
2 Correct 7 ms 384 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 416 KB Output is correct
2 Correct 5 ms 384 KB Output is correct

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 512 KB Output is correct
2 Execution timed out 1061 ms 2732 KB Time limit exceeded

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1056 ms 1140 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1079 ms 4288 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1087 ms 2680 KB Time limit exceeded
2 Halted 0 ms 0 KB -