-
Notifications
You must be signed in to change notification settings - Fork 0
/
BOJ_22728.java
72 lines (61 loc) · 1.92 KB
/
BOJ_22728.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
import java.io.DataInputStream;
import java.io.IOException;
public class Main {
private static int[][] arr;
private int search(int cur, int h) {
if (h == 0)
return cur;
return search(arr[h-1][cur] == 0 ? cur : arr[h-1][cur], h-1);
}
private void solution() throws Exception {
StringBuilder sb = new StringBuilder();
while (true) {
int n = nextInt();
int m = nextInt();
int a = nextInt();
if (n == 0) break;
arr = new int[1001][n+1];
while (m-->0) {
int h = nextInt();
int p = nextInt();
int q = nextInt();
arr[h][p] = q;
arr[h][q] = p;
}
sb.append(search(a, 1001)).append('\n');
}
System.out.print(sb);
}
public static void main(String[] args) throws Exception {
initFI();
new Main().solution();
}
private static final int DEFAULT_BUFFER_SIZE = 1 << 16;
private static DataInputStream inputStream;
private static byte[] buffer;
private static int curIdx, maxIdx;
private static void initFI() {
inputStream = new DataInputStream(System.in);
buffer = new byte[DEFAULT_BUFFER_SIZE];
curIdx = maxIdx = 0;
}
private static int nextInt() throws IOException {
int ret = 0;
byte c = read();
while (c <= ' ') c = read();
boolean neg = (c == '-');
if (neg) c = read();
do {
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
if (neg) return -ret;
return ret;
}
private static byte read() throws IOException {
if (curIdx == maxIdx) {
maxIdx = inputStream.read(buffer, curIdx = 0, DEFAULT_BUFFER_SIZE);
if (maxIdx == -1) buffer[0] = -1;
}
return buffer[curIdx++];
}
}