oj.uz

답안 #927176

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
927176 2024-02-14T10:59:37 Z vjudge1 Paths (BOI18_paths) C++17
0 / 100
 125 ms 54608 KB 
#include <bits/stdc++.h>

using namespace std;

#define all(a) a.begin(),a.end()
#define pb push_back
#define vt vector
#define endl '\n'
typedef long long ll;

const ll mod=1e9+7;
const ll inf=1e9+7;
const int N=5e5+4;

int n,m,k,a[N],used[N];
ll res=0;
vt<int>g[N][4];

void dfs(int v,int pr){
	used[v]=1;
	for(int i=1; i<=3; ++i) for(int to:g[v][i]) if(!used[to]) dfs(to,v);
	set<int>st;
	st.insert(1);
	st.insert(2);
	st.insert(3);
	st.erase(st.find(a[v]));
	ll bb=*st.begin();
	ll ee=*st.rbegin();
	ll aaa=g[v][ee].size();
	ll bbb=g[v][bb].size();
	res+=aaa*bbb;
}

void dfs2(int v,int pr){
	used[v]=1;
	for(int i=1; i<=3; ++i) for(int to:g[v][i]) if(!used[to]) dfs2(to,v);
	set<int>st;
	st.insert(1);
	st.insert(2);
	st.insert(3);
	st.erase(st.find(a[v]));
	int bb=*st.begin();
	int ee=*st.rbegin();
	//cout<<*bb<<' '<<g[v][*bb].size()<<endl;
	ll aaa=g[v][ee].size();
	ll bbb=g[v][bb].size();
	res+=aaa*2ll;
	res+=bbb*2ll;
	if(pr!=-1 && a[v]!=a[pr]) res-=2ll;
	//cout<<v<<' '<<res<<endl;
}

void solve(){
	cin>>n>>m>>k;
	set<int>uni;
	for(int i=1; i<=n; ++i) {
		cin>>a[i];
	//	uni.insert(a[i]);
	}
	for(int i=1; i<=m; ++i){
		int u,v;
		cin>>u>>v;
		g[u][a[v]].pb(v);
		g[v][a[u]].pb(u);
	}
	if(k==1){
		cout<<0<<endl;
		return;
	}
	if(k==2){
		for(int i=1; i<=n; ++i) if(!used[i]) dfs2(i,-1);
		cout<<res<<endl;
		return;
	}
	if(k==3){
		for(int i=1; i<=n; ++i) if(!used[i]) dfs(i,-1);
		res*=2ll;
		fill(used+1,used+1+n,0);
		//cout<<res<<endl;
		for(int i=1; i<=n; ++i) if(!used[i]) dfs2(i,-1);
		cout<<res<<endl;
	}
}
			
int main(){
	int tt=1;
	//cin>>tt;
	while(tt--) {
		solve();
	}
}

Subtask #1
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 16 ms 49752 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 125 ms 54608 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 16 ms 49752 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 11 ms 49752 KB Output isn't correct
2 Halted 0 ms 0 KB -