Submission #33816

#	Time	Username	Problem	Language	Result	Execution time	Memory
33816		mohammad_kilani	Simurgh (IOI17_simurgh)	C++14	13 / 100	76 ms	2024 KiB

simurgh

#include "simurgh.h"
#include <bits/stdc++.h>
using namespace std;
const int N =12;
vector<int> r , ans , u , v;
int n , m;
vector< int > g[N];
int cur = 0  , vis[N] , vi = 0 ;
void DFS(int node){
	vis[node] = vi;
	cur++;
	for(int i=0;i<g[node].size();i++){
		if(vis[g[node][i]] != vi) DFS(g[node][i]);
	}
}

void calc(int i){
	if(r.size() >= n) return;
	if(i == m){
		if(r.size() < n - 1) return;
		for(int i=0;i<n;i++){
			g[i].clear();
		}
		for(int i=0;i<r.size();i++){
			g[u[r[i]]].push_back(v[r[i]]);
			g[v[r[i]]].push_back(u[r[i]]);
		}
		cur = 0;
		vi++;
		DFS(0);
		if(cur != n) return;
		if(count_common_roads(r) == n-1){
			ans = r;
		}
		return ;
	}
	r.push_back(i);
	calc(i+1);
	r.pop_back();
	calc(i+1);
}

std::vector<int> find_roads(int N, std::vector<int> U, std::vector<int> V) {
	u = U;
	v = V;
	n = N;
	m = u.size();
	r.clear();
	calc(0);
	return ans;
}

Compilation message (stderr)

simurgh.cpp: In function 'void DFS(int)':
simurgh.cpp:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[node].size();i++){
               ^
simurgh.cpp: In function 'void calc(int)':
simurgh.cpp:18:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(r.size() >= n) return;
              ^
simurgh.cpp:20:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(r.size() < n - 1) return;
               ^
simurgh.cpp:24:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<r.size();i++){
                ^

• Subtask 1: 13 / 13
• Subtask 2: 0 / 17
• Subtask 3: 0 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 30