Submission #1282722

#	Time	Username	Problem	Language	Result	Execution time	Memory
1282722		nikaa123	Park (JOI17_park)	C++17	Compilation error	0 ms	0 KiB

park

#include "park.h"
#include <bits/stdc++.h>
using namespace std;

const int MAXN = 1505;
vector <int> g[MAXN];
int vis[MAXN];
int f[MAXN];
bool blocked[MAXN];
static int p[MAXN];
bool connected[MAXN][MAXN];
int parent[MAXN];
vector <int> curr, e, curr2;
int n;


void dfs3(int v){
	curr2.push_back(v);
	for(auto u : g[v]){
		if(!vis[u]){
			dfs3(u);
		}
	}
}

void dfs2(int v, int a){
	while(true){
		curr2.clear();
		dfs3(v);

		if(vis[v]){
			return;
		}

		for(int i = 0; i < n; i++){
			p[i] = 0;
		}
		for(auto ele : curr2){
			p[ele] = 1;
		}
		p[a] = 1;
		if(!Ask(min(v, a), max(v, a), p)){
			return;
		}

		int lo = 0;
		int hi = sz(curr2) - 1;
		int mid, res;
		while(lo <= hi){
			mid = (lo + hi) / 2;
			for(int i = 0; i < n; i++){
				p[i] = 0;
			}

			for(int i = 0; i <= mid; i++){
				p[curr2[i]] = 1;
			}
			p[a] = 1;

			if(Ask(min(v, a), max(v, a), p)){
				res = curr2[mid];
				hi = mid - 1;
			}else{
				lo = mid + 1;
			}
		}

		vis[res] = 1;
		e.push_back(res);
		for(auto u : g[res]){
			dfs2(u, a);
		}
	}
}

void merge(int a){
	if(f[a]){
		return;
	}

	for(int i = 0; i < n; i++){
		p[i] = f[i];
	}

	p[a] = 1;
	while(!Ask(0, a, p)){
		int lo = 0;
		int hi = n - 1;
		int mid, res;
		while(lo <= hi){
			mid = (lo + hi) / 2;
			for(int i = 0; i < n; i++){
				if(f[i] || i <= mid){
					p[i] = 1;
				}else{
					p[i] = 0;
				}
			}
			p[a] = 1;

			if(Ask(0, a, p)){
				hi = mid - 1;
				res = mid;
			}else{
				lo = mid + 1;
			}
		}

		merge(res);
	}


	for(int i = 0; i < n; i++){
		vis[i] = 0;
	}

	e.clear();
	dfs2(0,a);

	for(auto ele : e){
		Answer(min(ele, a), max(ele, a));
	}
	parent[a] = e[0];
	g[e[0]].push_back(a);
	f[a] = 1;
}

void Detect(int T, int N){
	for(int i = 0; i < MAXN; i++){
		f[i] = 0;
		p[i] = 0;
	}
	n = N;
	
	f[0] = 1;
	for(int i = 1; i < n; i++){
		merge(i);
	}
}

Compilation message (stderr)

park.cpp: In function 'void dfs2(int, int)':
park.cpp:47:26: error: 'sz' was not declared in this scope
   47 |                 int hi = sz(curr2) - 1;
      |                          ^~