oj.uz

답안 #764169

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
764169 2023-06-23T08:13:12 Z vjudge1 Exam (eJOI20_exam) C++14
14 / 100
 1000 ms 295336 KB 
//srand(time(0)) - always changing
//order_of_key(k): Number of items strictly smaller than k .
//find_by_order(k): K-th element in a set (counting from zero).
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>

using namespace std;

int n, ans = 0;
vector <int> a, b;
map <vector <int>, bool> was;

void rec(vector <int> a) {
	if (was[a]) return;
	else was[a] = 1;
	for (int i = 0; i < n - 1; i++) {
		int mn = a[i];
		int mx = a[i];
		for (int j = i + 1; j < n; j++) {
			mn = min(mn, a[j]);
			mx = max(mx, a[j]);
			if (mn < mx) {
				vector <int> act = a;
				for (int k = i; k <= j; k++) {
					act[k] = mx;
				}
				rec(act);
			}
		}
	}
	int cnt = 0;
	for (int i = 0; i < n; i++) {
		if (a[i] == b[i]) cnt++;
	}
	ans = max(ans, cnt);
}

void solve() {
	bool sub1 = true;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		int x;
		cin >> x;
		a.push_back(x);
	}
	for (int i = 1; i <= n; i++) {
		int x;
		cin >> x;
		b.push_back(x);
		if (i > 1) {
			if (b[i] != b[i - 1]) sub1 = false;
		}
	}
	if (sub1) {
		for (int i = 0; i < n; i++) {
			if (a[i] != b[i]) continue;
			for (int j = i - 1; j >= 0; j--) {
				if (a[j] >= a[i]) break;
				a[j] = a[i];
			}
			for (int j = i + 1; i < n; i++) {
				if (a[j] >= a[i]) break;
				a[j] = a[i];
			}
		}
		int cnt = 0;
		for (int i = 0; i < n; i++) {
			if (a[i] == b[i]) cnt++;
		}
		cout << cnt;
		return;
	}
	rec(a);
	cout << ans;
}

const bool Cases = 0;

signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int TT = 1;
	if (Cases) cin >> TT;
	while (TT--) {
		solve();
	}
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 102 ms 2344 KB Output is correct

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1086 ms 12324 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 395 ms 8568 KB Output is correct
2 Execution timed out 1082 ms 3600 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1102 ms 295336 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 102 ms 2344 KB Output is correct
7 Correct 9 ms 468 KB Output is correct
8 Execution timed out 1081 ms 1852 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 102 ms 2344 KB Output is correct
7 Correct 395 ms 8568 KB Output is correct
8 Execution timed out 1082 ms 3600 KB Time limit exceeded
9 Halted 0 ms 0 KB -