Submission #835906

#	Time	Username	Problem	Language	Result	Execution time	Memory
835906		BT21tata	Gap (APIO16_gap)	C++17	73.91 / 100	56 ms	2232 KiB

gap

#include "gap.h"
#include<bits/stdc++.h>
typedef long long ll;
#define pb push_back
using namespace std;
		
vector<ll>v;
ll mn, mx;
 
long long findGap(int T, int n)
{
	if(T==1)
	{
		ll l=0, r=1e18, ret=0;
		while(v.size()<n)
		{
			MinMax(l, r, &mn, &mx);
			v.pb(mn); v.pb(mx);
			l=mn+1; r=mx-1;
		}
		sort(v.begin(), v.end());
		for(int i=1; i<(int)v.size(); i++)
			ret=max(ret, v[i]-v[i-1]);
		return ret;
	}
	MinMax(0, 1e18, &mn, &mx);
	ll gap=(mx-mn-1)/(n-1)+1;
	ll l=mn, r=mx, curl=l, curr=l+gap-1, ans=gap;
	//cout<<curr<<endl;
	while(curr-gap<=r)
	{
		//cout<<curl<<' '<<curr<<" "<<ans<<endl;
		MinMax(curl+1, curr, &mn, &mx);
		if(mx==-1) mn=mx=curl;
		else mn=curl;
		if(mn!=mx and mx-mn<=gap) curl=mx, curr=curl+gap-1;
		else if(mn==mx) curl=mn, curr+=gap;
		else
		{
			MinMax(curr-gap+1, curr, &mn, &mx);
			if(mn==mx) ans=max(ans, mx-curl);
			else ans=max(ans, mn-curl);
			curl=mx, curr=curl+gap-1;
		}
	}
	return ans;
}
/*
11
5 7 8 100 130 190 200 201 203 1000 2004
*/

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:15:17: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   15 |   while(v.size()<n)
      |         ~~~~~~~~^~

• Subtask 1: 30 / 30
• Subtask 2: 43.909981477 / 70