Submission #1288537

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288537		Jawad_Akbar_JJ	Divide and conquer (IZhO14_divide)	C++20	100 / 100	157 ms	29436 KiB

divide

#include <iostream>
#include <map>

using namespace std;
#define int long long
const int N = 1<<18;
int x[N], p[N], g[N], ft[N], n, Ans, cur;

void Add(int i, int vl){
	for (; i; i -= i & -i)
		ft[i] = max(ft[i], vl);
}

int get(int i, int Ans = 0){
	for (; i < N; i += i & -i)
		Ans = max(Ans, ft[i]);
	return Ans;
}

map<int,int> mp, mp2;
signed main(){
	ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
	cin>>n;

	for (int i=1;i<=n;i++){
		cin>>x[i]>>g[i]>>p[i];
		g[i] += g[i-1];
		p[i] += p[i-1];

		mp[p[i] - x[i]];
		mp[p[i-1] - x[i]];
	}

	for (auto [i, j] : mp)
		mp2[i] = ++cur;

	for (int i=n;i>=1;i--){
		int a = mp2[p[i] - x[i]];
		int b = mp2[p[i-1] - x[i]];

		Add(a, g[i]);

		Ans = max(Ans, get(b) - g[i-1]);
	}

	cout<<Ans<<'\n';
}

• Subtask 1: 17 / 17
• Subtask 2: 31 / 31
• Subtask 3: 52 / 52