Submission #1306974

#	Time	Username	Problem	Language	Result	Execution time	Memory
1306974		namhh	Gap (APIO16_gap)	C++20	Compilation error	0 ms	0 KiB

gap

#include<bits/stdc++.h>
#include "gap.h"
using namespace std;
#define int long long
#define pii pair<int,int>
#define fi first
#define se second
const int N = 1e5+5;
int a[N];
int findGap(int T, int N){
	if(T == 1){
		int mn,mx;
		MinMax(1,1e18,&mn,&mx);
		a[1] = mn;
		a[n] = mx;
		for(int i = 2; i <= (n+1)/2; i++){
			int mnn,mxx;
			MinMax(a[i-1]+1,a[n-i+2]-1,&mnn,&mxx);
			a[i] = mnn;
			a[n-i+1] = mxx;
		}
		int ans = 0;
		for(int i = 2; i <= n; i++) ans = max(ans,a[i]-a[i-1]);
		return ans;
	}
	else{
		int mn,mx;
		MinMax(1,1e18,&mn,&mx);
		a[1] = mn;
		a[n] = mx;
		int gap = (mx-mn+n-2)/(n-1);
		int ans = gap;
		int cur = a[1];
		while(true){
			int mnn,mxx;
			int l = cur+1;
			int r = min(l+ans,a[n]);
			MinMax(l,r,&mnn,&mxx);
			if(mnn != mxx){
				ans = max(ans,mnn-cur);
				cur = mxx;
			}
			else{
				if(mnn != -1){
					ans = max(ans,mnn-cur);
				    cur = mnn;
				}
			}
			if(r == a[n]) break;
		}
		return ans;
	}
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(long long int, long long int)':
gap.cpp:15:19: error: 'n' was not declared in this scope
   15 |                 a[n] = mx;
      |                   ^
gap.cpp:30:19: error: 'n' was not declared in this scope
   30 |                 a[n] = mx;
      |                   ^