Submission #853936

#	Time	Username	Problem	Language	Result	Execution time	Memory
853936		Trisanu_Das	Bigger segments (IZhO19_segments)	C++17	100 / 100	70 ms	16984 KiB

segments

#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define int long long
 
pair<int,long long> dp[500005];
 
signed main(){
  ios_base::sync_with_stdio(false); cin.tie(NULL);
  int n; cin >> n;
  int a[n + 1]; for(int i = 1; i <= n; i++) cin >> a[i];
  for(int i = 2; i <= n; i++) a[i] += a[i - 1];
  dp[0].ff = 1; dp[0].ss = 0;
  for(int i = 1; i <= n; i++){
    dp[i] = max(dp[i], dp[i - 1]);
    int x = lower_bound(a + 1, a + n + 1, 2 * a[i] - dp[i].ss) - a;
    dp[x] = max(dp[x], {dp[i].ff + 1, a[i]});
  }
  cout << dp[n].ff << '\n';
}

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