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Submission #332935

# Submission time Handle Problem Language Result Execution time Memory
332935 2020-12-04T02:55:26 Z YJU Cats or Dogs (JOI18_catdog) C++14
0 / 100
 6 ms 9708 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef int ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=4e5+5;
const ll K=350;
const ld pi=acos(-1);
const long long INF=(1LL<<60);
#define SQ(i) ((i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()

long long dp[N][3],col[N];
vector<ll> v[N];

void DFS(ll nd,ll pa){
	for(auto i:v[nd]){
		if(i==pa)continue;
		DFS(i,nd);
		dp[nd][1]+=min(dp[i][1],dp[i][2]+1);
		dp[nd][2]+=min(dp[i][2],dp[i][1]+1);
	}
	if(col[nd]){dp[nd][3-col[nd]]=INF;}
}

void initialize(ll n,vector<ll> a,vector<ll> b){
	REP(i,n-1)v[a[i]].pb(b[i]),v[b[i]].pb(a[i]);
}

ll cat(ll id){
	col[id]=1;
	DFS(1,0);
	return min(dp[1][1],dp[1][2]);
}

ll dog(ll id){
	col[id]=2;
	DFS(1,0);
	return min(dp[1][1],dp[1][2]);
}

ll neighbor(ll id){
	col[id]=0;
	DFS(1,0);
	return min(dp[1][1],dp[1][2]);
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 9708 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 9708 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 62.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 9708 KB Output isn't correct
2 Halted 0 ms 0 KB -