Submission #334926

#	Time	Username	Problem	Language	Result	Execution time	Memory
334926		Trickster	Bigger segments (IZhO19_segments)	C++14	100 / 100	107 ms	16988 KiB

segments

//Suleyman Atayew
 
#include <algorithm>
#include <iostream>
#include <string.h>
#include <stdio.h>
#include <bitset>
#include <vector>
#include <queue>
#include <cmath>
#include <map>
#include <set>
 
#define N 500010
#define ff first
#define ss second
#define pb push_back
#define ll long long
#define mod 1000000007
#define pii pair <ll, ll>
#define sz(a) (ll)(a.size())
ll bigmod(ll a, ll b) { if(b==0)return 1; ll ret = bigmod(a, b/2); return ret * ret % mod * (b%2 ? a : 1) % mod; }

using namespace std;

ll n, in;
ll v[N];
ll dp[N];

int main()
{
    ios::sync_with_stdio(false);
	cin.tie(0);
    
    cin >> n;

    for(ll i = 1; i <= n; i++) cin >> v[i], v[i] += v[i-1];

    priority_queue <pii> Q;

    Q.push({0, 0});
    for(ll i = 1; i <= n; i++) {
        while(!Q.empty() && -Q.top().ff <= v[i]) {
            if(dp[Q.top().ss] > dp[in] || (dp[Q.top().ss] == dp[in] && in < Q.top().ss)) in = Q.top().ss;

            Q.pop();
        }

        dp[i] = dp[in]+1;
        Q.push({v[in]-v[i]*2, i});
    }

    cout << dp[n];
}

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