Submission #1106671

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106671		ASN49K	Gap (APIO16_gap)	C++14	70 / 100	45 ms	3472 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>
using i64=long long;
const i64 INF=1e18;
long long findGap(int test, int n)
{
    i64 rez=0;
    if (test == 1)
    {
        i64 l=1,r=INF;
        std::vector<int>a;
        for(int i=0;i<n/2+1,l<=r;i++)
        {
            MinMax(l,r,&l,&r);
            if(l==-1)
            {
                break;
            }
            a.push_back(l);
            a.push_back(r);
            l++;
            r--;
        }
        sort(a.begin(),a.end());
        rez=0;
        i64 last=a[0];
        for(auto &c:a)
        {
            rez=std::max(rez , c-last);
            last=c;
        }
    }
    else
    {
        i64 l,r;
        MinMax(1,INF,&l,&r);
        if(l==r)
        {
            return 0;
        }
        const i64 at_least_gap=(r-l+n-2)/(n-1);
        rez=at_least_gap;
        for(i64 i=l,last=l;i<=r;i+=at_least_gap+1)
        {
            i64 mn,mx;
            MinMax(i,i+at_least_gap,&mn,&mx);
            if(mn!=-1)
            {
                rez=std::max(rez , mn-last);
                last=mx;
            }
        }
    }
	return rez;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:12:22: warning: left operand of comma operator has no effect [-Wunused-value]
   12 |         for(int i=0;i<n/2+1,l<=r;i++)
      |                     ~^~~~~~

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