Submission #841828

#	Time	Username	Problem	Language	Result	Execution time	Memory
841828		manizare	Cop and Robber (BOI14_coprobber)	C++14	Compilation error	0 ms	0 KiB

coprobber

#include <bits/stdc++.h> 
#include "coprobber.h"

#define pb push_back 
#define F first 
#define S second 
#define all(a) a.begin(),a.end() 
#define pii pair<int,int>
#define int long long
using namespace std ;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxk=1002 , sq = 333   , lg = 20 , K = 0,   inf = 1e18+10  , mod = 1e9 + 7 ;
int cnt = 0 ,  n , dis[MAX_N] , par[MAX_N] , st[MAX_N] , en[MAX_N] , cur = 0  ;bool c[MAX_N][MAX_N] ; 
vector <int> G[MAX_N] ;
void dfs(int v , int p = -1){
  st[v] = cnt ; cnt++;
  for(int i =0 ; i < G[v].size() ; i++){
    int u = G[v][i] ; 
    if(u== p)continue ;
    dis[u] = dis[v] + 1;
    dfs(u , v) ;
  }
  en[v] = cnt ; cnt ++ ;
}

int start(int N , bool f[MAX_N][MAX_N]){
  for(int i = 0 ; i < N ; i++){
    for(int j =0 ; j < N; j++){
      if(f[i][j])G[i].pb(j) ;
    }
  }
  n = N ; 
  dfs(0) ;
  return 0; 
}

int ch(int v , int u){
  if(st[u] >= st[v] && en[v] >= en[u]){
     return 1; 
  }
  return 0 ;
}

int nextMove(int v){
  if(dis[v]-1 == dis[cur])return cur ; 
  for(int i =0 ; i < G[cur].size() ; i++){
    int u = G[cur][i] ;
    if(ch(u, v) && ch(cur , u)){
      cur = u;
      break ;
    }
  }
  return cur ;
}

/*
signed main(){
ios_base::sync_with_stdio(false); cin.tie(NULL);
  int  m ; 
  cin >> n >>m ;
  for(int i =1;i <= m ; i++){
    int v , u ;
    cin >> v >> u ;
    c[v][u] = c[u][v] = 1; 
  }
  int cc = start(n , c) ;
  cout << cc << endl ;cout.flush(); 
  cout.flush() ;
  if(cc == -1)return 0;
  while(1){
    int t ;
    cin >> t;
    if(t == cc)return 0 ; 
    cc = nextMove(t) ;
    cout << cc << endl ;cout.flush() ;

  }
}

*/

Compilation message (stderr)

coprobber.cpp: In function 'void dfs(long long int, long long int)':
coprobber.cpp:18:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |   for(int i =0 ; i < G[v].size() ; i++){
      |                  ~~^~~~~~~~~~~~~
coprobber.cpp: In function 'long long int nextMove(long long int)':
coprobber.cpp:47:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |   for(int i =0 ; i < G[cur].size() ; i++){
      |                  ~~^~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cc9QeXi5.o: in function `main':
grader.cpp:(.text.startup+0x16c): undefined reference to `start(int, bool (*) [500])'
/usr/bin/ld: grader.cpp:(.text.startup+0x2be): undefined reference to `nextMove(int)'
collect2: error: ld returned 1 exit status