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Submission #950144

# Submission time Handle Problem Language Result Execution time Memory
950144 2024-03-20T05:54:20 Z vjudge1 Triple Jump (JOI19_jumps) C++17
19 / 100
 440 ms 152936 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];
int oo[M][20], lo[M];
pair<int, int> pref[N], suf[N];

int get(int l, int r) {
	if(l>r) {
		return -inf;
	}
	int x = lo[r-l+1];
	return max(oo[l][x], oo[r-(1<<x)+1][x]);
}

void solve3() {
	cin >> q >> q >> q;
	for(int i = 2; i < M; ++i) {
		lo[i] = lo[i/2]+1;
	}
	for(int i = 1; i <= n; ++i) {
		oo[i][0] = a[i];
		pref[i] = max(pref[i-1], {a[i], i});
	}
	for(int i = n; i >= 1; --i) {
		suf[i] = max(suf[i+1], {a[i], i});
	}
	for(int i = 2; i < 18; ++i) {
		for(int j = 1; j <= n-(1<<i)+1; ++j) {
			oo[i][j] = max(oo[i][j], oo[i+(1<<(j-1))][j-1]); 
		}
	}
	int ans = 0;
	for(int i = 2; i < n; ++i) {
		int nxt = suf[i+1].second;
		ans = max(ans, a[i]+a[nxt]+get(max(1, i-(nxt-i)), i-1));
		nxt = pref[i-1].second;
		if(i+(i-nxt)<=n) {
			ans = max(ans, a[i]+a[nxt]+get(i+(i-nxt), n));
		}
	}
		
	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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 3172 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 3164 KB Output is correct
10 Correct 1 ms 3160 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 3172 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 3164 KB Output is correct
10 Correct 1 ms 3160 KB Output is correct
11 Correct 440 ms 152936 KB Output is correct
12 Correct 399 ms 152660 KB Output is correct
13 Correct 416 ms 152804 KB Output is correct
14 Correct 431 ms 152912 KB Output is correct
15 Correct 399 ms 152704 KB Output is correct
16 Correct 425 ms 152144 KB Output is correct
17 Correct 396 ms 152144 KB Output is correct
18 Correct 431 ms 152068 KB Output is correct
19 Correct 416 ms 152520 KB Output is correct

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 47 ms 47168 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 3172 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 3164 KB Output is correct
10 Correct 1 ms 3160 KB Output is correct
11 Correct 440 ms 152936 KB Output is correct
12 Correct 399 ms 152660 KB Output is correct
13 Correct 416 ms 152804 KB Output is correct
14 Correct 431 ms 152912 KB Output is correct
15 Correct 399 ms 152704 KB Output is correct
16 Correct 425 ms 152144 KB Output is correct
17 Correct 396 ms 152144 KB Output is correct
18 Correct 431 ms 152068 KB Output is correct
19 Correct 416 ms 152520 KB Output is correct
20 Runtime error 47 ms 47168 KB Execution killed with signal 11
21 Halted 0 ms 0 KB -