Submission #1285417

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285417		trandangquang	Cats or Dogs (JOI18_catdog)	C++20	Compilation error	0 ms	0 KiB

catdog

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

#define foru(i,a,b) for(int i=(a); i<=(b); ++i)
#define ford(i,a,b) for(int i=(a); i>=(b); --i)
#define rep(i,a) for(int i=0; i<(a); ++i)
#define sz(a) (int)(a).size()
#define all(a) (a).begin(),(a).end()
#define bit(s,i) (((s)>>(i))&1)
#define ii pair<int,int>
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define ll long long
#define _ << " " <<

template <class X, class Y> bool maxi(X &x, Y y){return x<y?x=y,true:false;}
template <class X, class Y> bool mini(X &x, Y y){return x>y?x=y,true:false;}

const int N=1010;

int n,dp[N][2],cd[N];
vector<int>adj[N];

void initalize(int _n, int _a[], int _b[]){
    n=_n;
    rep(i,n-1){
        adj[_a[i]].eb(_b[i]);
        adj[_b[i]].eb(_a[i]);
    }
    memset(cd,-1,sizeof(cd));
}

void dfs(int u, int p=-1){
    for(int v:adj[u]) if(v!=p){
        dfs(v,u);
    }
    if(cd[u]==-1){
        dp[u][0]=dp[u][1]=0;
        for(int v:adj[u]) if(v!=p){
            dp[u][0]+=min(dp[v][0],dp[u][1]+1);
            dp[u][1]+=min(dp[v][1],dp[u][0]+1);
        }
    } else{
        dp[u][cd[u]]=0; dp[u][cd[u]^1]=1e9;
        for(int v:adj[u]) if(v!=p){
            dp[u][cd[u]]+=min(dp[v][cd[u]],dp[v][cd[u]^1]+1);
        }
    }
}

void cat(int x){
    cd[x]=0;
    dfs(0);
    return min(dp[0][1],dp[0][0]);
}

void dog(int x){
    cd[x]=1;
    dfs(0);
    return min(dp[0][1],dp[0][0]);
}

void neighbor(int x){
    cd[x]=-1;
    dfs(0);
    return min(dp[0][1],dp[0][0]);
}
//
//int32_t main(){
//    #define task "test"
//    if(fopen(task".inp","r")){
//        freopen(task".inp","r",stdin);
//        freopen(task".out","w",stdout);
//    }
//    cin.tie(0)->sync_with_stdio(0);
//
//    int tc=1; //cin>>tc;
//    rep(i,tc){
//        solve();
//    }
//}

Compilation message (stderr)

catdog.cpp: In function 'void cat(int)':
catdog.cpp:56:15: error: return-statement with a value, in function returning 'void' [-fpermissive]
   56 |     return min(dp[0][1],dp[0][0]);
      |            ~~~^~~~~~~~~~~~~~~~~~~
catdog.cpp: In function 'void dog(int)':
catdog.cpp:62:15: error: return-statement with a value, in function returning 'void' [-fpermissive]
   62 |     return min(dp[0][1],dp[0][0]);
      |            ~~~^~~~~~~~~~~~~~~~~~~
catdog.cpp: In function 'void neighbor(int)':
catdog.cpp:68:15: error: return-statement with a value, in function returning 'void' [-fpermissive]
   68 |     return min(dp[0][1],dp[0][0]);
      |            ~~~^~~~~~~~~~~~~~~~~~~