Submission #919087

#	Time	Username	Problem	Language	Result	Execution time	Memory
919087		Aiperiii	Rice Hub (IOI11_ricehub)	C++14	100 / 100	12 ms	6204 KiB

ricehub

#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
int besthub(int R, int L, int X[], long long B)
{
   vector <long long> v;
   for(int i=0;i<R;i++)v.pb(X[i]);
   vector <long long> sum;long long x=0;
   for(int i=0;i<R;i++){
      x+=v[i];sum.pb(x);
   }
   int l=0,r=R+2;
   while(l+1<r){
      int md=(l+r)/2;
      bool ok=0;
      for(int i=0;i<R;i++){
         long long x=0;
         long long a=0,b=0;
         if(md%2==1){a=md/2;b=md/2;}
         else {a=md/2;b=md/2-1;}
         if(i>a-1 && i+b<R){
            long long pos=i-1;
            long long d=0;
            if(pos>=0)d+=sum[pos];
            if(pos-a>=0)d-=sum[pos-a];
            x+=v[i]*a-d;
            pos=i+b;
            d=sum[pos]-sum[i];
            x+=d-v[i]*b;
            if(x<=B)ok=1;
         }
      }
      if(ok)l=md;
      else r=md;
   }
   return l;
}

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32