Submission #1076211

#	Time	Username	Problem	Language	Result	Execution time	Memory
1076211		amin	The Big Prize (IOI17_prize)	C++14	90 / 100	46 ms	2132 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
vector<int>q;
int a[1000000],b[1000000];
int find_best(int n) {
    int cur=0;

for(int i=0;i<n;i++)
{
    a[i]=-1;
    b[i]=-1;
}
q=ask(0);
a[0]=q[0];
b[0]=q[1];
int ma=max(ma,a[0]+b[0]);
    while(cur!=n)
    {
      //  cout<<cur<<endl;

   if(a[cur]==-1)
   {
       q=ask(cur);
       a[cur]=q[0];
       b[cur]=q[1];
   }

 int p=a[cur];
 int pp=b[cur];
 if(p==0&&pp==0)
    return cur;
    if(p+pp<ma)
    {
        cur++;
        continue;
    }
    ma=max(ma,p+pp);
        int l=0;
        int j=sqrt(n);
        int r=min(n-cur,j);
        while(l<r-1)
        {
            int mid=(l+r)/2;
            if(a[cur+mid]==-1)
            {


           q=ask(cur+mid);
           a[cur+mid]=q[0];
           b[cur+mid]=q[1];
            }
           if(p==a[cur+mid]&&pp==b[cur+mid])
           {
               l=mid;
           }else
           r=mid;
        }
        cur=r+cur;
    }

}

Compilation message (stderr)

prize.cpp: In function 'int find_best(int)':
prize.cpp:31:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   31 |  if(p==0&&pp==0)
      |  ^~
prize.cpp:33:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   33 |     if(p+pp<ma)
      |     ^~
prize.cpp:62:1: warning: control reaches end of non-void function [-Wreturn-type]
   62 | }
      | ^
prize.cpp:17:5: warning: 'ma' is used uninitialized in this function [-Wuninitialized]
   17 | int ma=max(ma,a[0]+b[0]);
      |     ^~

• Subtask 1: 20 / 20
• Subtask 2: 70 / 80