Submission #1754522


Source Code Expand

#include<bits/stdc++.h>
using namespace std;

const int MAXN = 100010;

inline int read() {
	int x = 0, f = 1;
	char ch = getchar();
	for(; !isdigit(ch); ch = getchar()) if(ch=='-') f=-1;
	for(; isdigit(ch); ch = getchar()) x = (x*10)+(ch^48);
	return x * f;
}

int e, st[MAXN], to[MAXN<<1];
int nxt[MAXN<<1], l[MAXN][20];
inline void Add(int u, int v) {
	to[++e] = v, nxt[e] = st[u];
	st[u] = e;
}

int n, ans;

void dfs(int u, int fa) {
	int i, j;
	for(i = st[u]; i; i = nxt[i]) {
		int v = to[i];
		if(v == fa) continue;
		dfs(v, u);
		for(j = 0; j < 20; j++) l[u][j] += l[v][j];
	}
	int loc = -1;
	for(j = 0; j < 20; j++) if(l[u][j] >= 2) loc = j;
	for(j = loc+1; j < 20; j++) if(!l[u][j]) break;
	loc = j;
	ans = max(ans, loc);
	l[u][loc] = 1;
	for(j = 0; j < loc; j++) l[u][j] = 0;
}

int main() {

	int i;

	n = read();
	for(i = 1; i < n; i++) {
		int u = read(), v = read();
		Add(u, v), Add(v, u);
	}

	dfs(1, 0);

	printf("%d\n", ans);
	return 0;
}

Submission Info

Submission Time
Task D - Uninity
User Sunshine_cfbsl
Language C++14 (GCC 5.4.1)
Score 1400
Code Size 1013 Byte
Status AC
Exec Time 26 ms
Memory 15744 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 1400 / 1400
Status
AC × 2
AC × 74
Set Name Test Cases
Sample s1.txt, s2.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 35.txt, 36.txt, 37.txt, 38.txt, 39.txt, 40.txt, 41.txt, 42.txt, 43.txt, 44.txt, 45.txt, 46.txt, 47.txt, 48.txt, 49.txt, 50.txt, 51.txt, 52.txt, 53.txt, 54.txt, 55.txt, 56.txt, 57.txt, 58.txt, 59.txt, 60.txt, 61.txt, 62.txt, 63.txt, 64.txt, 65.txt, 66.txt, 67.txt, 68.txt, 69.txt, 70.txt, 71.txt, 72.txt, s1.txt, s2.txt
Case Name Status Exec Time Memory
01.txt AC 23 ms 9984 KB
02.txt AC 22 ms 9984 KB
03.txt AC 22 ms 9984 KB
04.txt AC 22 ms 9984 KB
05.txt AC 22 ms 9984 KB
06.txt AC 23 ms 9984 KB
07.txt AC 22 ms 9984 KB
08.txt AC 22 ms 9984 KB
09.txt AC 17 ms 12416 KB
10.txt AC 17 ms 13952 KB
11.txt AC 10 ms 8960 KB
12.txt AC 10 ms 9216 KB
13.txt AC 26 ms 15744 KB
14.txt AC 24 ms 15360 KB
15.txt AC 25 ms 14464 KB
16.txt AC 24 ms 11904 KB
17.txt AC 18 ms 9984 KB
18.txt AC 18 ms 9984 KB
19.txt AC 19 ms 9984 KB
20.txt AC 20 ms 9984 KB
21.txt AC 21 ms 9984 KB
22.txt AC 20 ms 9984 KB
23.txt AC 19 ms 9984 KB
24.txt AC 17 ms 9984 KB
25.txt AC 20 ms 9984 KB
26.txt AC 20 ms 9984 KB
27.txt AC 21 ms 9984 KB
28.txt AC 21 ms 9984 KB
29.txt AC 22 ms 9984 KB
30.txt AC 22 ms 9984 KB
31.txt AC 22 ms 9984 KB
32.txt AC 22 ms 9984 KB
33.txt AC 23 ms 9984 KB
34.txt AC 22 ms 9984 KB
35.txt AC 22 ms 9984 KB
36.txt AC 22 ms 9984 KB
37.txt AC 22 ms 9984 KB
38.txt AC 22 ms 9984 KB
39.txt AC 22 ms 9984 KB
40.txt AC 23 ms 9984 KB
41.txt AC 21 ms 10112 KB
42.txt AC 24 ms 9984 KB
43.txt AC 22 ms 9984 KB
44.txt AC 22 ms 10112 KB
45.txt AC 21 ms 10112 KB
46.txt AC 21 ms 10112 KB
47.txt AC 21 ms 10112 KB
48.txt AC 23 ms 10112 KB
49.txt AC 22 ms 10112 KB
50.txt AC 24 ms 10112 KB
51.txt AC 22 ms 10112 KB
52.txt AC 22 ms 10112 KB
53.txt AC 24 ms 10112 KB
54.txt AC 22 ms 10240 KB
55.txt AC 22 ms 10112 KB
56.txt AC 17 ms 9984 KB
57.txt AC 22 ms 13952 KB
58.txt AC 22 ms 13952 KB
59.txt AC 23 ms 10112 KB
60.txt AC 22 ms 10112 KB
61.txt AC 19 ms 11264 KB
62.txt AC 21 ms 11264 KB
63.txt AC 1 ms 2304 KB
64.txt AC 1 ms 2304 KB
65.txt AC 1 ms 2304 KB
66.txt AC 1 ms 2304 KB
67.txt AC 1 ms 2304 KB
68.txt AC 1 ms 2304 KB
69.txt AC 1 ms 2304 KB
70.txt AC 1 ms 2304 KB
71.txt AC 1 ms 2304 KB
72.txt AC 1 ms 2304 KB
s1.txt AC 1 ms 2304 KB
s2.txt AC 1 ms 2304 KB