oj.uz

Submission #491106

# Submission time Handle Problem Language Result Execution time Memory
491106 2021-11-30T14:44:04 Z inksamurai Magenta (COCI21_magenta) C++17
110 / 110
 63 ms 9740 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
#define rep(i,n) for(int i=0;i<n;i++)
#define crep(i,x,n) for(int i=x;i<n;i++)
#define drep(i,n) for(int i=n-1;i>=0;i--)
#define vec(...) vector<__VA_ARGS__>
#define _3cSpNGp ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
using pii=pair<int,int>;
using vi=vector<int>;

int main(){
_3cSpNGp;
	int n;
	cin>>n;
	int _a,_b;
	cin>>_a>>_b;
	_a--,_b--;
	vec(vec(pii)) adj(n);
	rep(i,n-1){
		int u,v;
		string s;
		cin>>u>>v>>s;
		u--,v--;
		adj[u].pb({v,s=="magenta"?2:s=="crvena"?1:0});
		adj[v].pb({u,s=="magenta"?2:s=="crvena"?1:0});
	}
	bool poka=0,pokb=0;
	for(auto edge : adj[_a]){
		int u=edge.fi,color=edge.se;
		if(u!=_b and color!=1) poka=1;
	}
	for(auto edge : adj[_b]){
		int u=edge.fi,color=edge.se;
		if(color!=0) pokb=1;
	}
	if(!poka){
		cout<<"Marin\n";
		exit(0);
	}
	if(!pokb){
		cout<<"Paula\n";
		exit(0);
	}
	vec(vi) dist(3,vi(n,-1));
	rep(t,3){
		auto dfs=[&](auto self,int v,int par)->void{
			for(auto edge : adj[v]){
				int u=edge.fi,color=edge.se;
				if(u==par) continue;
				if(t==0 and color==1) continue;
				if(t==1 and color==0) continue;
				dist[t][u]=dist[t][v]+1;
				self(self,u,v); 
			}
		};
		int root=_a;
		if(t==1) root=_b;
		dist[t][root]=0;
		dfs(dfs,root,-1);
	}
	bool cand=0;
	auto magicaldfs=[&](auto self,int v,int t,int par)->void{
		for(auto edge : adj[v]){
			int u=edge.fi,color=edge.se;
			if(u==par or dist[t^1][u]==-1) continue;
			if(dist[t][u]!=-1 and dist[t][u]<=dist[t^1][u]) continue;
			if(dist[t][u]==-1 and dist[t][v]==-1){
				cand=1;
			}
			self(self,u,t,v);
		}
	};
	magicaldfs(magicaldfs,(dist[2][_b]%2==0?_b:_a),(dist[2][_b]%2),-1);
	if(dist[2][_b]%2==0){
		if(cand==1){
			cout<<"Magenta\n";
		}else{
			cout<<"Paula\n";
		}
	}else{
		if(cand==1){
			cout<<"Magenta\n";
		}else{
			cout<<"Marin\n";
		}
	}
//
	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:40:7: warning: unused variable 'u' [-Wunused-variable]
   40 |   int u=edge.fi,color=edge.se;
      |       ^
Main.cpp: In instantiation of 'main()::<lambda(auto:24, int, int, int)> [with auto:24 = main()::<lambda(auto:24, int, int, int)>]':
Main.cpp:80:67:   required from here
Main.cpp:71:18: warning: unused variable 'color' [-Wunused-variable]
   71 |    int u=edge.fi,color=edge.se;
      |                  ^~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 59 ms 7896 KB Output is correct
2 Correct 51 ms 7848 KB Output is correct
3 Correct 54 ms 7900 KB Output is correct
4 Correct 55 ms 7940 KB Output is correct
5 Correct 51 ms 7840 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 59 ms 7896 KB Output is correct
15 Correct 51 ms 7848 KB Output is correct
16 Correct 54 ms 7900 KB Output is correct
17 Correct 55 ms 7940 KB Output is correct
18 Correct 51 ms 7840 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 0 ms 312 KB Output is correct
25 Correct 0 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 0 ms 204 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 38 ms 8132 KB Output is correct
32 Correct 63 ms 8148 KB Output is correct
33 Correct 55 ms 9740 KB Output is correct
34 Correct 47 ms 9660 KB Output is correct