oj.uz

Submission #622952

# Submission time Handle Problem Language Result Execution time Memory
622952 2022-08-04T21:19:54 Z inksamurai Mag (COCI16_mag) C++17
36 / 120
 455 ms 262144 KB 
#include <bits/stdc++.h>
#define int ll
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3SgiE60 ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e

const int inf=1e12;

pii compare(const pii&l,const pii&r){
	return l.fi*r.se<r.fi*l.se?l:r;
}

signed main(){
_3SgiE60;
	int n;
	cin>>n;
	vec(vi) adj(n);
	rep(i,n-1){
		int u,v;
		cin>>u>>v;
		u-=1,v-=1;
		adj[u].pb(v);
		adj[v].pb(u);	
	}
	vi a(n);
	rep(i,n){
		cin>>a[i];
	}
	pii pns={inf,1};
	auto dfs=[&](auto self,int v,int par)->pii{
		pii q={inf,1};
		vec(pii) e;
		for(auto &u:adj[v]){
			if(u==par) continue;
			pii p=self(self,u,v);
			e.pb(p);
			if(q.fi<=inf and q.fi*a[v]<inf/p.fi){
				pii now={q.fi*p.fi*a[v],p.se+q.se+1};
				// if(now.fi==1 and now.se==4) print("ho",v,u);
				pns=compare(pns,now);
			}
			if(p.fi<=inf){
				q=compare(q,p);
			}
			{
				pii now={p.fi*a[v],p.se+1};
				pns=compare(pns,now);
			}
		}
		q={inf,1};
		for(auto p:e){
			q=compare(q,pii(p.fi*a[v],p.se+1));
		}
		pns=compare(pns,pii(a[v],1));
		q=compare(q,pii(a[v],1));
		return q;
	};
	dfs(dfs,0,-1);
	int g=gcd(pns.fi,pns.se);
	pns.fi/=g;
	pns.se/=g;
	cout<<pns.fi<<"/"<<pns.se<<"\n";
	// print(pns.fi,pns.se);
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 321 ms 125520 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 419 ms 248612 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 391 ms 244620 KB Output is correct

Subtask #6
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 352 ms 62588 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 329 ms 73340 KB Output is correct
2 Correct 63 ms 7192 KB Output is correct
3 Correct 455 ms 262144 KB Output is correct

Subtask #8
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 7116 KB Output is correct
2 Incorrect 369 ms 79292 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #9
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 343 ms 62780 KB Output is correct
2 Incorrect 320 ms 62140 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 332 ms 64252 KB Output isn't correct
2 Halted 0 ms 0 KB -