Submission #959335

#	Time	Username	Problem	Language	Result	Execution time	Memory
959335		Darren0724	Bigger segments (IZhO19_segments)	C++17	100 / 100	69 ms	16980 KiB

segments

#include <bits/stdc++.h>
using namespace std;
#define LCBorz ios_base::sync_with_stdio(false); cin.tie(0);
#define int long long
#define all(x) x.begin(), x.end()
#define endl '\n'
const int N=200005;
const int INF=1e18;
const int mod=1e9+7;

int32_t main() {
    LCBorz;
    int n;cin>>n;
    vector<int> v(n+1);
    for(int i=1;i<=n;i++){
        cin>>v[i];
        v[i]+=v[i-1];
    }
    vector<int> dp(n+5),from(n+5);
    for(int i=1;i<=n;i++){
        from[i]=max(from[i],from[i-1]);
        dp[i]=dp[from[i]]+1;
        int t=lower_bound(all(v),v[i]*2-v[from[i]])-v.begin();
        from[t]=i;
    }
    cout<<dp[n]<<endl;
    return 0;
}

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