Submission #1238120

#	Time	Username	Problem	Language	Result	Execution time	Memory
1238120		vivkostov	The Big Prize (IOI17_prize)	C++20	Compilation error	0 ms	0 KiB

prize

#include "prize.h"
//#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
mt19937 mt(time(nullptr));
int sum,lamp;
vector<int>a;
void prec()
{
   for(int i=1;i<=5;i++)
   {
       a=(ask(mt()%n));
       sum=max(sum,a[0]+a[1]);
   }
}
void rec(int l,int r,int br)
{
    if(lamp||!br)return;
    if(r-l+1==br)
    {
        for(int i=l;i<=r;i++)
        {
            a=ask(i);
            if(a[0]+a[1]==0)
            {
                lamp=i+1;
                break;
            }
            if(a[1]==0)break;
        }
        return;
    }
    int mid=(l+r)/2;
    a=ask(mid);
    if(a[0]+a[1]==0)
    {
        lamp=mid+1;
        return;
    }
    rec(l,mid-1,a[0]);
    rec(mid+1,r,a[1]);
}
int find_best(int n)
{
    prec();
    rec(1,n,sum);
	return lamp-1;
}

Compilation message (stderr)

prize.cpp: In function 'void prec()':
prize.cpp:12:20: error: 'n' was not declared in this scope
   12 |        a=(ask(mt()%n));
      |                    ^