Submission #520361

#	Time	Username	Problem	Language	Result	Execution time	Memory
520361		krit3379	Gap (APIO16_gap)	C++17	100 / 100	65 ms	3216 KiB

gap

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

long long a[100005],l,r,ans,ma,mi;

long long findGap(int t,int n){
    int i,j;
    if(t==1){
        l=0,r=1e18;
        for(i=1,j=n;i<=j;i++,j--){
            MinMax(l,r,&mi,&ma);
            a[i]=mi;
            a[j]=ma;
            l=mi+1;
            r=ma-1;
        }
        for(i=1;i<n;i++)ans=max(ans,a[i+1]-a[i]);
        return ans;
    }
    else{
        long long last,gap;
        vector<long long> a;
        l=0,r=1e18;
        MinMax(l,r,&mi,&ma);
        a.push_back(mi);
        a.push_back(ma);
        last=ma-1;
        gap=(ma-mi+n-2)/(n-1);
        while(l<r){
            l=mi+1;
            r=min(mi+gap,last);
            MinMax(l,r,&mi,&ma);
            if(mi==-1){
                mi=r;
                if(r==last)break;
                continue;
            }
            a.push_back(mi);
            a.push_back(ma);
            mi=r;
            if(r==last)break;
        }
        sort(a.begin(),a.end());
        for(i=1;i<a.size();i++)ans=max(ans,a[i]-a[i-1]);
        return ans;
    }
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:45:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         for(i=1;i<a.size();i++)ans=max(ans,a[i]-a[i-1]);
      |                 ~^~~~~~~~~

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