Submission #833242

#	Time	Username	Problem	Language	Result	Execution time	Memory
833242		vjudge1	Exam (eJOI20_exam)	C++17	0 / 100	1 ms	724 KiB

exam

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

#define For(i, n) for (int i = 0; i < n; i++)
#define Each(x, v) for (auto x : v)
#define pb push_back

const int MAXN = 200;
int N, H[MAXN + 5], T[MAXN + 5], dp[MAXN + 5][MAXN + 5];

int f(int l, int r) {
	if (l > r) return 0;
	if (l == r) {
		if (T[l] == H[l]) return 1;
		return 0;
	}
	if (dp[l][r] != -1) return dp[l][r];
	int terbesar = 0, cnt = 0;
	for (int i = l; i <= r; i++) terbesar = max(terbesar, H[i]);
	for (int i = l; i <= r; i++) {
		if (T[i] == terbesar) {
			cnt++;
		}
	}
	int ans = cnt;
	for (int i = l; i <= r - 1; i++) {
		ans = max(ans, f(l, i) + f(i + 1, r));
	}
	return dp[l][r] = ans;
}

bool ceksubsoal2() {
	int pivot = T[0];
	for (int i = 1; i < N; i++) {
		if (T[i] != T[0]) {
			return false;
		}
	}
	return true;
}

void subsoal2() {
	int target = T[0], ans = 0;
	vector <int> pos;
	for (int i = 0; i < N; i++) {
		if (H[i] == target) {
			pos.pb(i);
			ans++;
		}
	}
	Each (x, pos) {
		for (int i = x - 1; i >= 0; i--) {
			if (H[i] < H[x]) {
				ans++;
			}
			else break;
		}
		for (int i = x + 1; i < N; i++) {
			if (H[i] < H[x]) {
				ans++;
			}
			else break;
		}
	}
	cout << ans << endl;
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	memset(dp, -1, sizeof dp);
	cin >> N;
	For (i, N) cin >> H[i];
	For (i, N) cin >> T[i];
	if (ceksubsoal2()) subsoal2();
	else cout << f(0, N - 1) << endl;
}

Compilation message (stderr)

exam.cpp: In function 'bool ceksubsoal2()':
exam.cpp:33:6: warning: unused variable 'pivot' [-Wunused-variable]
   33 |  int pivot = T[0];
      |      ^~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22