Submission #524143

#	Time	Username	Problem	Language	Result	Execution time	Memory
524143		inluminas	Bigger segments (IZhO19_segments)	C++17	0 / 100	1 ms	204 KiB

segments

#include"bits/stdc++.h"
using namespace std;
 
#define ll long long
#define endl "\n"
#define fastio ios_base::sync_with_stdio(false)
#define inf LLONG_MAX

int main(){
  fastio;

  int n;
  cin>>n;
  ll pre[n+1];
  pre[0]=0;
  for(int i=1;i<=n;i++){
    ll x;
    cin>>x;
    pre[i]=pre[i-1]+x;
  }
  ll ans=1;
  for(int i=1;i<=n;i++){
    ll last=pre[i],idx=i,cnt=1;
    while(idx<n && last<=pre[n]-pre[idx]){
      int lo=idx+1,hi=n;
      while(hi-lo>1){
        int mid=(lo+hi)>>1;
        if(pre[mid]-pre[idx]>=last) hi=mid;
        else lo=mid;
      }
      if(pre[lo]-pre[idx]>=last){
        last=pre[lo]-pre[idx];
        idx=lo;
        cnt++;
      }else if(pre[hi]-pre[idx]>=last){
        last=pre[hi]-pre[idx];
        idx=hi;
        cnt++;
      }else{
        cnt++;
        break;
      }
    }
    ans=max(ans,cnt);
  }
  cout<<ans<<endl;
  return 0;
}

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