Pagini recente » Cod sursa (job #1884994) | Cod sursa (job #1220375) | Cod sursa (job #3130909) | Cod sursa (job #2957797) | Cod sursa (job #2330705)
/*
_ _ ___ ___ _ __ __
__| | __ _ / | / _ \ / _ \ (_)/ / _ \ \
/ _` | / _` | | | | | | | | | | | / / (_) | |
| (_| | | (_| | | | | |_| | | |_| | / /_ _ | |
\__,_| \__,_| |_| \___/ \___/ /_/(_) (_) | |
/_/
*/
//#include <iostream>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <set>
#include <algorithm>
#include <bitset>
#include <time.h>
#include <tuple>
#include <fstream>
#include <iomanip>
#include <utility>
#include <list>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/trie_policy.hpp>
#include <unordered_map>
#pragma warning "da 100% din tine. :)"
#define nl '\n'
#define cnl cout << '\n';
#define pb(x) push_back(x)
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define ll long long
#define ull unsigned ll
#define a first
#define b second
#ifdef INFOARENA
#define ProblemName "bfs"
#endif
#define MCONCAT(A, B) A B
#ifdef ProblemName
#define InFile MCONCAT(ProblemName, ".in")
#define OuFile MCONCAT(ProblemName, ".out")
#else
#define InFile "a.in"
#define OuFile "a.out"
#endif
//using namespace __gnu_pbds;
using namespace std;
ifstream cin(InFile);
ofstream cout(OuFile);
//typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
//typedef trie<string, null_type, trie_string_access_traits<>, pat_trie_tag, trie_prefix_search_node_update> pref_trie;
template<class v, class type>
void print(v Vector, type nr) {
for_each(all(Vector), [](type x) {
cout << x << ' ';
});
}
struct vertex {
bool vis = false;
list<int> adjlist;
};
int dist[100001];
vertex v[100001];
void add(vertex &target, int to_add_index) {
target.adjlist.push_back(to_add_index);
}
void dfs(int start_index) {
v[start_index].vis = true;
for (auto it = v[start_index].adjlist.begin(); it != v[start_index].adjlist.end(); ++it) {
//parcurgem dfs, surpriza
//*it = indexul urmatorului nod din lista
if (v[*it].vis == false) {
dfs(*it);
}
}
}
void bfs(int start_index) {
queue<int> q;
q.push(start_index);
v[start_index].vis = 1;
dist[start_index] = 0;
int cindex;
while (!q.empty()) {
cindex = q.front();
for (auto it = v[cindex].adjlist.begin(); it != v[cindex].adjlist.end(); ++it) {
if (v[*it].vis == 0) {
dist[*it] = dist[cindex] + 1;
v[*it].vis = 1;
q.push(*it);
}
}
q.pop();
}
}
int main() {
ios_base::sync_with_stdio(false);
// clock_t tStart = clock();
cin.tie(0);
int x, y;
int n, m, s;
int cc = 0;
cin >> n >> m >> s;
for (int i = 0; i <= n; ++i)
dist[i] = -1;
for (int i = 0; i < m; ++i) {
cin >> x >> y;
add(v[x], y);
}
bfs(s);
for (int i = 1; i <= n; ++i) {
cout << dist[i] << ' ';
}
cout << nl;
// printf("\nTime taken: %.2fs\n", (double) (clock() - tStart) / CLOCKS_PER_SEC);
}