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Submission #60599

# Submission time Handle Problem Language Result Execution time Memory
60599 2018-07-24T11:26:26 Z Tenuun Simurgh (IOI17_simurgh) C++17
0 / 100
 3 ms 512 KB 
#include "simurgh.h"
#include <bits/stdc++.h>

using namespace std;

vector<pair<int, int> >adj[241];
vector<int>t;
bool vis[241];

void DFS(int u, int p){
	vis[u]=true;
	for(auto v:adj[u]){
		if(v.first!=p && vis[v.first]==false){
			vis[v.first]=true;
			if(p!=-1) t.push_back(v.second);
			DFS(v.first, u);
		}
	}
}

int calc(int u){
	int mx=-1, p, tmp;
	for(auto v:adj[u]){
		t.push_back(v.second);
		tmp=count_common_roads(t);;
		if(tmp>mx){
			mx=tmp;
			p=v.second;
		}
		t.pop_back();
	}
	return p;
}

vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	bool check[n]={false};
	int f, ind=0;
	vector<int> res(n - 1);
	for(int i=0; i<u.size(); i++){
		adj[u[i]].push_back({v[i], i});
		adj[v[i]].push_back({u[i], i});
	}
	for(int i=0; i<n; i++){
		if(check[i]) continue;
		memset(vis, false, sizeof vis);
		t.clear();
		DFS(i, -1);
		f=calc(i);
		check[u[f]]=true;
		check[v[f]]=true;
		res[ind++]=f;
	}
	return res;
}

Compilation message

simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:39:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<u.size(); i++){
               ~^~~~~~~~~
simurgh.cpp: In function 'int calc(int)':
simurgh.cpp:32:9: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return p;
         ^

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 252 KB correct
2 Incorrect 2 ms 356 KB WA in grader: NO
3 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 252 KB correct
2 Incorrect 2 ms 356 KB WA in grader: NO
3 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 252 KB correct
2 Incorrect 2 ms 356 KB WA in grader: NO
3 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB correct
2 Incorrect 3 ms 512 KB WA in grader: NO
3 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 252 KB correct
2 Incorrect 2 ms 356 KB WA in grader: NO
3 Halted 0 ms 0 KB -