oj.uz

Submission #60632

# Submission time Handle Problem Language Result Execution time Memory
60632 2018-07-24T12:29:54 Z Tenuun Simurgh (IOI17_simurgh) C++17
0 / 100
 126 ms 3820 KB 
#include "simurgh.h"
#include <bits/stdc++.h>
 
using namespace std;
 
vector<pair<int, int> >adj[501];
vector<int>t;
vector<int> res;
bool vis[501], check[125000]={false};
int N;

void DFS(int u, int p){
	vis[u]=true;
	for(auto v:adj[u]){
		if(v.first!=p && vis[v.first]==false){
			if(p!=-1) t.push_back(v.second);
			DFS(v.first, u);
		}
	}
}
 
int calc(int u){
	vector<int>b;
	int mx=-1, p=-1, tmp;
	if(t.size()!=N-2) return -1;
	for(auto v:adj[u]){
		if(check[v.second]){
			t.push_back(v.second);
			mx=count_common_roads(t);
			t.pop_back();
			break;
		}
	}
	for(auto v:adj[u]){
		if(check[v.second])continue;
		t.push_back(v.second);
		tmp=count_common_roads(t);
		if(mx==-1){
			mx=tmp;
			b.push_back(v.second);
			p=v.second;
		}
		else if(tmp>mx){
			b.clear();
			mx=tmp;
			b.push_back(v.second);
			p=v.second;
		}
		else if(tmp==mx){
			b.push_back(v.second);
			p=v.second;
		}
		t.pop_back();
	}
	for(int i=0; i<b.size(); i++){
		check[b[i]]=true;
		res.push_back(b[i]);
	}
	return p;
}
 
vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	N=n;
	int f, ind=0;
	memset(check, false, sizeof check);
	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++){
		memset(vis, false, sizeof vis);
		t.clear();
		DFS(i, -1);
		f=calc(i);
		if(f<0 || f>u.size() || check[f]) continue;
	}
	res.resize(n-1);
	return res;
}

Compilation message

simurgh.cpp: In function 'int calc(int)':
simurgh.cpp:25:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(t.size()!=N-2) return -1;
     ~~~~~~~~^~~~~
simurgh.cpp:55:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<b.size(); i++){
               ~^~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:66:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<u.size(); i++){
               ~^~~~~~~~~
simurgh.cpp:75:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(f<0 || f>u.size() || check[f]) continue;
             ~^~~~~~~~~
simurgh.cpp:64:9: warning: unused variable 'ind' [-Wunused-variable]
  int f, ind=0;
         ^~~

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB correct
2 Correct 3 ms 484 KB correct
3 Correct 2 ms 560 KB correct
4 Correct 4 ms 636 KB correct
5 Correct 3 ms 636 KB correct
6 Correct 3 ms 636 KB correct
7 Correct 3 ms 636 KB correct
8 Correct 3 ms 664 KB correct
9 Correct 3 ms 664 KB correct
10 Correct 3 ms 664 KB correct
11 Incorrect 3 ms 832 KB WA in grader: NO
12 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB correct
2 Correct 3 ms 484 KB correct
3 Correct 2 ms 560 KB correct
4 Correct 4 ms 636 KB correct
5 Correct 3 ms 636 KB correct
6 Correct 3 ms 636 KB correct
7 Correct 3 ms 636 KB correct
8 Correct 3 ms 664 KB correct
9 Correct 3 ms 664 KB correct
10 Correct 3 ms 664 KB correct
11 Incorrect 3 ms 832 KB WA in grader: NO
12 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB correct
2 Correct 3 ms 484 KB correct
3 Correct 2 ms 560 KB correct
4 Correct 4 ms 636 KB correct
5 Correct 3 ms 636 KB correct
6 Correct 3 ms 636 KB correct
7 Correct 3 ms 636 KB correct
8 Correct 3 ms 664 KB correct
9 Correct 3 ms 664 KB correct
10 Correct 3 ms 664 KB correct
11 Incorrect 3 ms 832 KB WA in grader: NO
12 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 832 KB correct
2 Correct 3 ms 832 KB correct
3 Incorrect 126 ms 3820 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB correct
2 Correct 3 ms 484 KB correct
3 Correct 2 ms 560 KB correct
4 Correct 4 ms 636 KB correct
5 Correct 3 ms 636 KB correct
6 Correct 3 ms 636 KB correct
7 Correct 3 ms 636 KB correct
8 Correct 3 ms 664 KB correct
9 Correct 3 ms 664 KB correct
10 Correct 3 ms 664 KB correct
11 Incorrect 3 ms 832 KB WA in grader: NO
12 Halted 0 ms 0 KB -