Submission #828061

#	Time	Username	Problem	Language	Result	Execution time	Memory
828061		minhcool	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KiB

stations

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

#define pb push_back

const int N = 5e5 + 5;

int n;
vector<int> Adj[N];

int l[N], r[N];

vector<int> vis;

void dfs(int u, int p){
	l[u] = vis.size();
	vis.pb(u);
	for(auto v : Adj[u]){
		if(v == p) continue;
		dfs(v, u);
	}
	r[u] = vis.size();
}

//vector<int> vis;

int tol[1005][1005];

void prep(){
	int cnt = 0;
	for(int i = 0; i < n; i++){
		for(int j = i + 1; j < n; j++){
			tol[i][j] = cnt;
			cnt++;
		}
	}
}

vector<int> label(int n_, int k, vector<int> u, vector<int> v) {
	prep();
	n = n_;
	vis.clear();
	for(int i = 0; i < n; i++) Adj[i].clear();
	for(int i = 0; i < (n - 1); i++){
		Adj[u[i]].pb(v[i]); Adj[v[i]].pb(u[i]);
	}
	dfs(0, 0);
	vector<int> labels(n);
	for(int i = 0; i < n; i++){
		labels[i] = i;
	}
	return labels;
	/*
	std::vector<int> labels(n);
	for (int i = 0; i < n; i++) {
		labels[i] = i;
	}
	return labels;*/
}

bool anc(int x, int y){
    //if(x == 0) return 1;
	while(y){
    	y = (y - 1) / 2;
        if(x == y) return 1;
    }
    return 0;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if(anc([c[0]], y)) return c[0];
    else if(anc(c[1], y)) return c[1];
    else return (s - 1) / 2;
	//return c[0];
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:73:11: error: expected ',' before '[' token
   73 |  if(anc([c[0]], y)) return c[0];
      |           ^
      |           ,
stations.cpp:73:11: error: expected identifier before '[' token
stations.cpp: In lambda function:
stations.cpp:73:15: error: expected '{' before ',' token
   73 |  if(anc([c[0]], y)) return c[0];
      |               ^
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:73:17: error: 'y' was not declared in this scope
   73 |  if(anc([c[0]], y)) return c[0];
      |                 ^
stations.cpp:77:1: warning: control reaches end of non-void function [-Wreturn-type]
   77 | }
      | ^