oj.uz

답안 #950408

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
950408 2024-03-20T09:28:30 Z vjudge1 3단 점프 (JOI19_jumps) C++17
19 / 100
 380 ms 150092 KB 
#include<bits/stdc++.h>

using namespace std;

const int N = (int)5e5+7;
const int M = (int)2e5+7;
const int inf = (int)1e9+7;

int n, q, a[N];
int dp[5003][5003], mx[5003][5003];
pair<int, int> suf[N];
int l[N], r[N];

void solve3() {
	cin >> q >> q >> q;
	for(int i = n; i >= 1; --i) {
		suf[i] = max(suf[i+1], {a[i], i});
	}                                  	
	stack<int> st;
	for(int i = 1; i <= n; ++i) {
		l[i] = i;
		while(!st.empty() && a[st.top()]<=a[i]) {
		    l[i]=l[st.top()];
			st.pop();
		}
		st.push(i);
	}
	while(!st.empty()) {
		continue;
	}
	for(int i = n; i >= 1; --i) {
		r[i] = i;
		while(!st.empty() && a[st.top()]<=a[i]) {
			r[i] = r[st.top()];
			st.pop();
		}
	}
	int ans = 0;
	for(int j = 2; j < n; ++j) {
		for(int i = l[j]; i >= max(1, l[j]-1); --i) {
			int o = (j-i);
			if(i<j && j+o <= n) {
				ans = max(ans, a[i]+a[j]+suf[j+o].first);
			}
		}
	}		
	cout << ans;
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin >> n;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i];
	} 
	if(n>5000) {
		solve3();
		return 0;
	}
	for(int i = 1; i <= n; ++i) {
		for(int j = i; j <= n; ++j) {
			mx[i][j] = max(mx[i][j-1], a[j]);
		}
	}
	for(int len = 3; len <= n; ++len) {
		for(int i = 1; i <= n-len+1; ++i) {
			int j = i+len-1;
			dp[i][j]=max(dp[i+1][j], dp[i][j-1]);
			int cur = a[i]+a[j];
			int m = (i+j)/2;
			cur += mx[i+1][m];
			dp[i][j] = max(dp[i][j], cur);
		}
	}
	cin >> q;
	while(q--) {
		int l, r;
		cin >> l >> r;
		cout << dp[l][r] << "\n";
	}
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Correct 1 ms 3164 KB Output is correct
4 Correct 1 ms 3164 KB Output is correct
5 Correct 1 ms 3164 KB Output is correct
6 Correct 1 ms 3164 KB Output is correct
7 Correct 1 ms 3164 KB Output is correct
8 Correct 1 ms 3164 KB Output is correct
9 Correct 1 ms 3160 KB Output is correct
10 Correct 1 ms 3160 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Correct 1 ms 3164 KB Output is correct
4 Correct 1 ms 3164 KB Output is correct
5 Correct 1 ms 3164 KB Output is correct
6 Correct 1 ms 3164 KB Output is correct
7 Correct 1 ms 3164 KB Output is correct
8 Correct 1 ms 3164 KB Output is correct
9 Correct 1 ms 3160 KB Output is correct
10 Correct 1 ms 3160 KB Output is correct
11 Correct 375 ms 150080 KB Output is correct
12 Correct 375 ms 149960 KB Output is correct
13 Correct 356 ms 149860 KB Output is correct
14 Correct 378 ms 150092 KB Output is correct
15 Correct 380 ms 150044 KB Output is correct
16 Correct 363 ms 149488 KB Output is correct
17 Correct 364 ms 149268 KB Output is correct
18 Correct 366 ms 149412 KB Output is correct
19 Correct 356 ms 149936 KB Output is correct

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 7768 KB Output is correct
2 Incorrect 17 ms 7772 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Correct 1 ms 3164 KB Output is correct
4 Correct 1 ms 3164 KB Output is correct
5 Correct 1 ms 3164 KB Output is correct
6 Correct 1 ms 3164 KB Output is correct
7 Correct 1 ms 3164 KB Output is correct
8 Correct 1 ms 3164 KB Output is correct
9 Correct 1 ms 3160 KB Output is correct
10 Correct 1 ms 3160 KB Output is correct
11 Correct 375 ms 150080 KB Output is correct
12 Correct 375 ms 149960 KB Output is correct
13 Correct 356 ms 149860 KB Output is correct
14 Correct 378 ms 150092 KB Output is correct
15 Correct 380 ms 150044 KB Output is correct
16 Correct 363 ms 149488 KB Output is correct
17 Correct 364 ms 149268 KB Output is correct
18 Correct 366 ms 149412 KB Output is correct
19 Correct 356 ms 149936 KB Output is correct
20 Correct 20 ms 7768 KB Output is correct
21 Incorrect 17 ms 7772 KB Output isn't correct
22 Halted 0 ms 0 KB -