Submission #854937

#	Time	Username	Problem	Language	Result	Execution time	Memory
854937		vjudge1	Triple Jump (JOI19_jumps)	C++17	0 / 100	19 ms	8028 KiB

jumps

#include<bits/stdc++.h>
using namespace std; 
#define int long long
#define ll long long
#define pii pair<int,int>
#define F first
#define S second
#define endl '\n'
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
const int mod = 1e9 + 7;
const int N = 200005;
const ll inf = 1e18;
int mx[N];
int suf[N];
int a[N];
int ans[N];
int dp[N];
int32_t main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	int n;
	cin >> n;
	for (int i=1;i<=n;i++){
		cin >> a[i];
		mx[i] = max(a[i], mx[i-1]);
	}
	dp[2] = a[1]+a[2];
	for (int j=3;j<=n;j++){
		dp[j] = max(dp[j-1], a[j]+mx[j-1]);
	}
	int l = 1;
	for (int r=l+1;r<=n;r++){
		int c = r + (r-l);
		if (c>n) break;
		suf[c] = max(dp[r], suf[c]);
	}
	for (int i=1;i<=n;i++){
		suf[i] = max(suf[i], suf[i-1]);
	}
	for (int r=l+2;r<=n;r++){
		ans[r] = max(ans[r-1], suf[r]+a[r]);
	}
	memset(suf, 0, sizeof(suf));
	int q;
	cin >> q;
	while (q--){
		int r;
		cin >> l >> r;
		cout << ans[r] << endl;
	}
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 27
• Subtask 4: 0 / 54