Submission #946474

#	Time	Username	Problem	Language	Result	Execution time	Memory
946474		simona1230	Gap (APIO16_gap)	C++17	46.91 / 100	72 ms	4008 KiB

gap

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

long long ans,mn,mx;
void solve(long long l,long long r)
{
    long long mn1,mx1;
    long long m=(l+r)/2;
    MinMax(l,m,&mn1,&mx1);
    if(mn1==-1)
    {
        solve(m+1,r);
        return;
    }
    long long mn2,mx2;
    MinMax(m+1,r,&mn2,&mx2);
    if(mn1!=-1&&mn2!=-1)ans=max(ans,mn2-mx1);

    if(mx1-mn1>mx2-mx2)
    {
        if(mn1!=-1&&mx1-mn1>=ans)solve(mn1,mx1);
        if(mn2!=-1&&mx2-mn2>=ans)solve(mn2,mx2);
    }
    else
    {
        if(mn2!=-1&&mx2-mn2>=ans)solve(mn2,mx2);
        if(mn1!=-1&&mx1-mn1>=ans)solve(mn1,mx1);
    }
}

vector<long long> v;
long long findGap(int t,int n)
{
    if(t==1)
    {
        long long l=0,r=1e18;
        while(l<=r&&v.size()<n)
        {
            long long minn,maxx;
            MinMax(l,r,&minn,&maxx);
            if(minn==-1)break;
            v.push_back(minn);
            if(minn!=maxx)v.push_back(maxx);
            l=minn+1,r=maxx-1;
        }
        sort(v.begin(),v.end());
        for(int i=1;i<v.size();i++)
            ans=max(ans,v[i]-v[i-1]);
        return ans;
    }
    solve(0,1e18);
    return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:38:29: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |         while(l<=r&&v.size()<n)
      |                     ~~~~~~~~^~
gap.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         for(int i=1;i<v.size();i++)
      |                     ~^~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 16.9083288594 / 70