Pagini recente » Statistici Bogdan Cristian (Skibo) | Istoria paginii utilizator/kyrk | Istoria paginii utilizator/oblet | Statistici Teo Manoiu (teo16) | Cod sursa (job #3150247)
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
const int MAX_LENGTH = 100000;
vector<int> graph[MAX_LENGTH + 1];
int minDistance[MAX_LENGTH + 1];
void gen(int nodesNr, int archesNr, int currentNode, int startNode, int len) {
for (vector<int>::iterator it = graph[currentNode].begin(); it < graph[currentNode].end(); ++it) {
if (*it != startNode) {
gen(nodesNr, archesNr, *it, startNode, len + 1);
minDistance[*it] = len + 1;
}
}
}
int main() {
int nodesNr, archesNr, startNode;
fin >> nodesNr >> archesNr >> startNode;
for (int arch = 1; arch <= archesNr; ++arch) {
int start, end;
fin >> start >> end;
graph[start].push_back(end);
}
gen(nodesNr, archesNr, startNode, startNode, 0);
for (int i = 1; i <= nodesNr; ++i) {
if (minDistance[i] == 0 && i != startNode) {
fout << "-1 ";
} else {
fout << minDistance[i] << ' ';
}
}
return 0;
}
/*
2 2 1
1 2
1 1
=>
0 1
5 7 2
1 2
2 1
2 2
3 2
2 5
5 3
4 5
=>
1 0 2 -1 1
*/