Submission #1106677

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106677		ASN49K	Gap (APIO16_gap)	C++14	100 / 100	44 ms	3964 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<i64>a;
        for(int i=0;i<(n+1)/2 && l<=r;i++)
        {
            i64 extra_l=l,extra_r=r;
            MinMax(extra_l,extra_r,&l,&r);
            if(l==-1)
            {
                break;
            }
            a.push_back(l);
            if(l!=r)a.push_back(r);
            l++;
            r--;
        }
        assert(a.size()==n);
        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)

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from gap.cpp:2:
gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:25:24: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |         assert(a.size()==n);
      |                ~~~~~~~~^~~

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