제출 #614022

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
614022		Dan4Life	기지국 (IOI20_stations)	C++17	컴파일 에러	0 ms	0 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
vector<int> adj[1001], col;
int lab = 0;
void dfs(int s, int p=-1, int lab){
	col[s]=lab; int x = 1000;
	for(auto u : adj[s]){
		if(u==p) continue;
      	if(lab==0) dfs(u,s,x); 
      	else dfs(u,s,lab+1);
      	x+=1000;
    }
}
 
vector<int> label(int n, int k, vector<int> a, vector<int> b)
{
    col.resize(n,0); lab = 0;
    for(int i = 0; i < n; i++) adj[i].clear();
	for (int i = 0; i < n-1; i++)
		adj[a[i]].pb(b[i]), adj[b[i]].pb(a[i]);
  	int ind = 0;
  	for(int i = 0; i < n; i++) if(adj[i].size()>=3) ind = i;
  	dfs(ind,-1,0); return col;
}

int fi(int x){
 	while(x>9) x/=10; return x;
}
int find_next_station(int s, int t, vector<int> c){
	if(c.size()==1 or fi(s)!=fi(t)) return c[0];
  	if(c.size()==2) return c[1];
   	for(auto u : c)
        if(fir(u)==fir(s)) 
          	return u;
}

컴파일 시 표준 에러 (stderr) 메시지

stations.cpp:7:31: error: default argument missing for parameter 3 of 'void dfs(int, int, int)'
    7 | void dfs(int s, int p=-1, int lab){
      |                           ~~~~^~~
stations.cpp:7:21: note: ...following parameter 2 which has a default argument
    7 | void dfs(int s, int p=-1, int lab){
      |                 ~~~~^~~~
stations.cpp: In function 'int fi(int)':
stations.cpp:29:3: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   29 |   while(x>9) x/=10; return x;
      |   ^~~~~
stations.cpp:29:21: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   29 |   while(x>9) x/=10; return x;
      |                     ^~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:35:12: error: 'fir' was not declared in this scope; did you mean 'fi'?
   35 |         if(fir(u)==fir(s))
      |            ^~~
      |            fi
stations.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type]
   37 | }
      | ^