Submission #1275412

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275412		tm.khoa.tm	Cats or Dogs (JOI18_catdog)	C++20	0 / 100	7 ms	4156 KiB

catdog

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

#define love ManchesterUnited
#define pb push_back
#define FOR(i,a,b) for (int i=(a); i<=(b); i++)
#define FORD(i,b,a) for (int i=(b); i>=(a); i--)
#define REP(i, n) for(int i=0; i<(n); ++i)
#define RED(i, n) for(int i=(n)-1; i>=0; --i)
#define endl '\n'

const int N = 1005;
int n,q,ans;
vector<int> adj[N];
int pet[N];
vector<int> a,b;
bool vis[N];
int chan[N][N];

void dfs(int u,int par,int type){
    vis[u] = 1;
    if (pet[u]){
        if (pet[u] != type){
            chan[par][u] = 1;
            chan[u][par] = 1;
            ans++;
            return;
        }
    }
    for (int v : adj[u]) if (v != par && !vis[v]){
        if (chan[v][u]) continue;
        dfs(v,u,type);
    }
}

int dangerLevel() {
    memset(vis,0,sizeof vis);
    FOR(i,1,n) {
        if (vis[i]) continue;
        if (pet[i] == 1 || pet[i] == 2) dfs(i,0,pet[i]);
    }

//    FOR(i,1,n){
//        FOR(j,1,n) cout << chan[i][j] << " ";
//        cout << endl;
//    }

    return ans;
}

void initialize(int N, vector<int> A, vector<int> B){
    n = N;
    FOR(i,1,n){ adj[i].clear(); pet[i]=0; }
    for (int i = 0; i < N-1; i++){
        int u = A[i], v = B[i];
        adj[u].pb(v);
        adj[v].pb(u);
    }
}

int cat(int v){
    pet[v] = 1;
    return dangerLevel();
}

int dog(int v){
    pet[v] = 2;
    return dangerLevel();
}

int neighbor(int v){
    memset(chan, 0, sizeof chan);
    ans = 0;
    pet[v] = 0;
    return dangerLevel();
}

//int32_t main(){
//    freopen("test.inp","r",stdin);
//    ios::sync_with_stdio(0);
//    cin.tie(0); cout.tie(0);
//
//    cin >> n;
//    a.resize(n); b.resize(n);
//    FOR(i,0,n-2) cin >> a[i];
//    FOR(i,0,n-2) cin >> b[i];
//
//    initialize(n,a,b);
//
//    cin >> q;
//    FOR(_,1,q){
//        int type,v; cin >> type >> v;
//        if (type == 1) cout << cat(v) << endl;
//        if (type == 2) cout << dog(v) << endl;
//        if (type == 3) cout << neighbor(v) << endl;
//    }
//}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 30
• Subtask 3: 0 / 62