Submission #1113714

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113714		simona1230	Gap (APIO16_gap)	C++17	0 / 100	3081 ms	2804 KiB

gap

#include <bits/stdc++.h>
#include "gap.h"
using namespace std;


/*int nn;
long long a[200001];

void MinMax(long long l,long long r,long long *mn,long long *mx)
{
    *mn=-1;
    for(int i=1;i<=nn;i++)
        if(a[i]>=l)
    {
        *mn=a[i];
        break;
    }
    *mx=-1;
    for(int i=nn;i>=1;i--)
        if(a[i]<=r)
    {
        *mx=a[i];
        break;
    }
}*/

long long n;
long long solve(long long l,long long r,long long ll,long long rr)
{
    if(l==-1||l>r)return 0;
    //cout<<l<<" "<<r<<" "<<ll<<" "<<rr<<endl;
    long long ans=0;
    long long len=r-l+1;
    long long s=sqrt(len);

    long long b=len/n;
    long long last=-1;
    for(long long i=l;i<=r;i+=b)
    {
        long long j=min(i+b-1,r);
        long long mn=0,mx=0;
        //cout<<i<<" "<<j<<endl;
        MinMax(i,j,&mn,&mx);

        if(mn==-1)continue;

        if(last!=-1)ans=max(ans,mn-last);
        else if(ll!=-1)ans=max(ans,mn-ll);
        last=mx;

        ans=max(ans,solve(mn+1,mx-1,mn,mx));
    }

    if(last==-1)last=ll;
    if(last!=-1&&rr!=-1)ans=max(ans,rr-last);
    return ans;
}

long long findGap(int t,int N)
{
    n=N;
    return solve(1,1e18,-1,-1);
}


/*int main()
{
    long long d=0;
    int x;
    cin>>x>>nn;
    for(int i=1;i<=nn;i++)
    {
        cin>>a[i];
        if(i!=1)d=max(d,a[i]-a[i-1]);
    }

    long long answer=findGap(1,nn);
    cout<<d<<" "<<answer<<endl;
}*/

Compilation message (stderr)

gap.cpp: In function 'long long int solve(long long int, long long int, long long int, long long int)':
gap.cpp:34:15: warning: unused variable 's' [-Wunused-variable]
   34 |     long long s=sqrt(len);
      |               ^

• Subtask 1: 0 / 30
• Subtask 2: 0 / 70