algorithms
software expert
소프트웨어 익스퍼트 1219 (software expert 1219)
·
소프트웨어 익스퍼트 1219 (software expert 1219)
소프트웨어 익스퍼트 1219
코드
import java.io.*;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.Queue;
public class SWE1219 {
static int t = 10, n, e;
static ArrayList<Integer>[] g = new ArrayList[101];
static String[] ins;
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
for (int i = 0; i < 101; i++) {
g[i] = new ArrayList<>();
}
while (t-- != 0) {
for (int i = 0; i < 101; i++) {
g[i].clear();
}
ins = br.readLine().split(" ");
n = Integer.parseInt(ins[0]);
e = Integer.parseInt(ins[1]);
ins = br.readLine().split(" ");
for (int i = 0; i < 2*e; i += 2) {
g[Integer.parseInt(ins[i])].add(Integer.parseInt(ins[i + 1]));
}
bw.write("#" + (10 - t) + " " + ((bfs()) ? 1 : 0) + "\n");
bw.flush();
}
bw.close();
}
public static boolean bfs() {
Queue<Integer> q = new LinkedList<>();
boolean[] v = new boolean[101];
q.offer(0);v[0] = true;
boolean isArrive = false;
while (!q.isEmpty()) {
int cur = q.poll();
if (cur == 99) {isArrive = true;break;}
for (int i = 0; i < g[cur].size(); i++) {
int to = g[cur].get(i);
if (!v[to]) {
v[to] = true;q.offer(to);
}
}
}
return isArrive;
}
}