Submission #1113721

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113721		simona1230	Gap (APIO16_gap)	C++17	0 / 100	37 ms	5828 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;
vector<long long> v;
long long solve(long long l,long long r)
{
    if(l>r)return 0;
    //cout<<l<<" "<<r<<" "<<ll<<" "<<rr<<endl;

    long long ans=0;

    long long len=r-l+1;
    long long b=max(1LL*1,len/n);

    for(long long i=l;i<=r;i+=b)
    {
        long long j=min(i+b-1,r);
        long long mn=0,mx=0;

        MinMax(i,j,&mn,&mx);

        if(mn==-1)continue;

        v.push_back(mn);
        v.push_back(mx);

        solve(mn+1,mx-1);
    }
}

long long findGap(int t,int N)
{
    n=N;
    solve(0,1e18);
    long long ans;
    sort(v.begin(),v.end());
    for(int i=1;i<v.size();i++)
        ans=max(ans,v[i]-v[i-1]);

    return ans;
}


/*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)':
gap.cpp:34:15: warning: unused variable 'ans' [-Wunused-variable]
   34 |     long long ans=0;
      |               ^~~
gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:61:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for(int i=1;i<v.size();i++)
      |                 ~^~~~~~~~~
gap.cpp: In function 'long long int solve(long long int, long long int)':
gap.cpp:53:1: warning: control reaches end of non-void function [-Wreturn-type]
   53 | }
      | ^
gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:64:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   64 |     return ans;
      |            ^~~

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