제출 #979199

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
979199		starchan	Gap (APIO16_gap)	C++17	100 / 100	42 ms	3876 KiB

gap

#include<bits/stdc++.h>
#include "gap.h"
using namespace std;
#define in pair<int, int>
#define int long long
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define INF (int)2e18
#define MX (int)3e5+5
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
 
 
int findgap1(int n)
{
	vector<int> a(n);
	int l = 0;
	int r = n-1;
	int cl = 0;
	int cr = 1e18;
	while(l <= r)
	{
		int x, y;
		MinMax(cl, cr, &x, &y);
		cl = x+1;
		cr = y-1;
		a[l++] = x;
		a[r--] = y;
	}
	int ok = 0;
	for(int i = 0; i < n-1; i++)
		ok = max(ok, a[i+1]-a[i]);
	return ok;
}
 
int findgap2(int n)
{
	int mn, mx;
	MinMax(0, 1e18, &mn, &mx);
	int d = (mx-mn)/(n-1);
	if((mx-mn)%(n-1))
		d++;
	//answer is >= d.
	int prev = mn; int ans = d;
	for(int t = mn+1; t < mx; t+=d)
	{
		int x, y;
		MinMax(t, t+d-1, &x, &y);
		if(x != -1)
		{
			ans = max(ans, x-prev);
			prev = y;
		}
	}
	return ans;
}
 
//dummy real function
int findGap(signed T, signed n)
{
	int t = T;
	int N = n;
	if(t == 1)
		return findgap1(n);
	else
		return findgap2(n); 	 
}

컴파일 시 표준 에러 (stderr) 메시지

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:63:6: warning: unused variable 'N' [-Wunused-variable]
   63 |  int N = n;
      |      ^

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