Submission #489462

#	Time	Username	Problem	Language	Result	Execution time	Memory
489462		Haruto810198	Triple Jump (JOI19_jumps)	C++17	19 / 100	428 ms	127784 KiB

jumps

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define double long double

#define FOR(i, l, r, d) for(int i=(l); i<=(r); i+=(d))
#define szof(x) ((int)(x).size())

#define vi vector<int>
#define pii pair<int, int>

#define F first
#define S second

#define pb push_back
#define eb emplace_back
#define mkp make_pair

const int INF = INT_MAX;
const int LNF = INF*INF;
const int MOD = 1000000007;

const int MAX = 5010;

int n, q;
int arr[MAX];
int st[MAX][20];
int res[MAX][MAX];

int query(int l, int r){
	int rk = __lg(r - l + 1);
	return max(st[l][rk], st[r - (1<<rk) + 1][rk]);
}

signed main(){
	
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	
	cin>>n;
	FOR(i, 1, n, 1){
		cin>>arr[i];
	}
	
	FOR(i, 1, n, 1){
		st[i][0] = arr[i];
	}
	FOR(j, 1, 19, 1){
		FOR(i, 1, n, 1){
			int ii = i + (1<<(j - 1));
			if(ii <= n) st[i][j] = max(st[i][j - 1], st[ii][j - 1]);
			else st[i][j] = st[i][j - 1];
		}
	}
	
	FOR(i, 1, n, 1){
		FOR(k, i + 2, n, 1){
			int j = (i + k) / 2;
			res[i][k] = arr[i] + query(i + 1, j) + arr[k];
		}
	}
	
	FOR(dis, 3, n - 1, 1){
		FOR(i, 1, n - dis, 1){
			int j = i + dis;
			res[i][j] = max({res[i][j], res[i + 1][j], res[i][j - 1]});
			//cerr<<"res["<<i<<"]["<<j<<"] = "<<res[i][j]<<endl;
		}
	}
	
	cin>>q;
	while(q--){
		int l, r;
		cin>>l>>r;
		cout<<res[l][r]<<'\n';
	}
	
	return 0;

}

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