#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<x.F<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
#include "train.h"
const int N=5050;
int n,A[N],B[N],dp[N],vis[N];
vector<int> g[N];
bool dfs(int u,int rt){
vis[u]=1;
for(auto v : g[u]){
if(v==rt) return 1;
if(vis[v]) continue ;
if(dfs(v)) return 1;
}
return 0;
}
bool check(int u){
fill(vis,vis+N,0);
return dfs(u,u);
}
vector<int> who_wins(vector<int> a,vector<int> r,vector<int> u,vector<int> v){
f(i,0,u.size()) g[u[i]].pb(v[i]);
f(i,0,n) dp[i]=(r[i] && check(i));
f(u,0,n) for(auto v : g[u]) dp[v]|=dp[u];
vector<int> ans(n);
f(i,0,n) ans[i]=dp[i];
}
/*
int32_t main(){
ios:: sync_with_stdio(0), cin.tie(0), cout.tie(0);
who_wins({1,1},{1,0},{0,0,1,1},{0,1,0,1});
}*/
Compilation message
train.cpp: In function 'bool dfs(int, int)':
train.cpp:34:11: error: too few arguments to function 'bool dfs(int, int)'
34 | if(dfs(v)) return 1;
| ^
train.cpp:29:6: note: declared here
29 | bool dfs(int u,int rt){
| ^~~
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:8:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
8 | #define f(i,a,b) for(int i=a;i<b;i++)
......
43 | f(i,0,u.size()) g[u[i]].pb(v[i]);
| ~~~~~~~~~~~~
train.cpp:43:2: note: in expansion of macro 'f'
43 | f(i,0,u.size()) g[u[i]].pb(v[i]);
| ^
train.cpp:48:1: warning: no return statement in function returning non-void [-Wreturn-type]
48 | }
| ^
