Submission #563499

#	Time	Username	Problem	Language	Result	Execution time	Memory
563499		penguin133	Gap (APIO16_gap)	C++14	30 / 100	1169 ms	2044 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>
using namespace std;
long long B[100005];
long long findGap(int T, int N)
{
	if(T == 1){
		long long ans = 0, mini, maxi;
		B[N+1] = (long long)1e18 + 5, B[0] = -1;
		int j = N;
		for(int i=1;i<=j;i++){
			//cout << B[i-1] << " " << B[j+1] << '\n';
			MinMax(B[i-1]+1, B[j+1]-1, &mini, &maxi);
			//cout << mini << '\n';
			B[i] = mini, B[j] = maxi;
			//cout << *mini << " " << *maxi << '\n';
			j--;
		}
		for(int i=1;i<N;i++)ans = max(ans, B[i+1] - B[i]);
		return ans;
	}
	else{
		long long ans = 0, mini, maxi;
		B[N+1] = (long long)1e18 +1;
		for(int i=N;i>=1;i--){
			long long s = 0, e = B[i+1] - 1, ans2 = s;
			while(s <= e){
				long long m = (s + e)/2;
				MinMax(m, B[i+1]-1, &mini, &maxi);
				if(mini != -1)ans2 = mini, s = mini + 1;
				else e = m - 1;
			}
			B[i] = ans2;
		}
		for(int i=1;i<N;i++)ans = max(ans, B[i+1] - B[i]);
		return ans;
	}
	return 0;
}

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