Submission #1134153

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134153		Agageldi	Bigger segments (IZhO19_segments)	C++17	0 / 100	0 ms	328 KiB

segments

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define N 600005
#define pb push_back
#define ff first
#define ss second
#define sz(s) (int)s.size()

ll n, t, a[N], dp[N], p[N], sum[N];
set <int> ans;
map <int,int> vis;

int main (){
	ios::sync_with_stdio(0);cin.tie(0);
	cin >> n;
	for(int i = 1; i <= n; i++) {
		cin >> a[i];
		p[i] = p[i - 1] + a[i];
	}
	dp[1] = 1;
	sum[1] = a[1];
	vis[a[1]] = 1;
	ans.insert(a[1]);
	for(int i = 2; i <= n; i++) {
		if(a[i] >= sum[i - 1]) {
			dp[i] = dp[i - 1] + 1;
			sum[i] = a[i];
			vis[a[i]] = i;
			ans.insert(sum[i]);
			continue;
		}
		int ind = 0;
		for(auto j : ans) {
			if(j <= p[i] - p[vis[j]]) ind = vis[j];
			else break;
		}
		vis[p[i] - p[ind]] = i;
		sum[i] = p[i] - p[ind];
		dp[i] = dp[ind] + 1;
		ans.insert(sum[i]);
	}
	cout << dp[n] << '\n';
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27