Submission #1754516


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];
int nxt[MAXN], 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 0
Code Size 1007 Byte
Status RE
Exec Time 236 ms
Memory 265216 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 1400
Status
AC × 2
AC × 14
WA × 2
RE × 58
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 RE 104 ms 3072 KB
02.txt RE 105 ms 3072 KB
03.txt RE 106 ms 3072 KB
04.txt RE 105 ms 3072 KB
05.txt RE 104 ms 3072 KB
06.txt RE 105 ms 3072 KB
07.txt RE 104 ms 3072 KB
08.txt RE 105 ms 5120 KB
09.txt RE 101 ms 2944 KB
10.txt RE 104 ms 2944 KB
11.txt AC 10 ms 8960 KB
12.txt AC 10 ms 9216 KB
13.txt RE 105 ms 3072 KB
14.txt RE 104 ms 3072 KB
15.txt RE 105 ms 3072 KB
16.txt RE 105 ms 3072 KB
17.txt RE 105 ms 3072 KB
18.txt RE 106 ms 3072 KB
19.txt RE 105 ms 3072 KB
20.txt RE 104 ms 3072 KB
21.txt RE 105 ms 3072 KB
22.txt RE 106 ms 3072 KB
23.txt RE 106 ms 3072 KB
24.txt RE 235 ms 265216 KB
25.txt RE 107 ms 3072 KB
26.txt RE 105 ms 3072 KB
27.txt WA 11 ms 3072 KB
28.txt RE 105 ms 3072 KB
29.txt RE 106 ms 3072 KB
30.txt RE 105 ms 3072 KB
31.txt RE 108 ms 3072 KB
32.txt RE 105 ms 3072 KB
33.txt WA 11 ms 3072 KB
34.txt RE 108 ms 3072 KB
35.txt RE 108 ms 3072 KB
36.txt RE 105 ms 3072 KB
37.txt RE 105 ms 5120 KB
38.txt RE 108 ms 3072 KB
39.txt RE 105 ms 3072 KB
40.txt RE 105 ms 3072 KB
41.txt RE 105 ms 3072 KB
42.txt RE 105 ms 3072 KB
43.txt RE 106 ms 3072 KB
44.txt RE 105 ms 3072 KB
45.txt RE 105 ms 3072 KB
46.txt RE 106 ms 3072 KB
47.txt RE 106 ms 3072 KB
48.txt RE 106 ms 3072 KB
49.txt RE 105 ms 3072 KB
50.txt RE 105 ms 3072 KB
51.txt RE 108 ms 3072 KB
52.txt RE 108 ms 3072 KB
53.txt RE 105 ms 3072 KB
54.txt RE 105 ms 3072 KB
55.txt RE 109 ms 3072 KB
56.txt RE 236 ms 265216 KB
57.txt RE 105 ms 3072 KB
58.txt RE 105 ms 3072 KB
59.txt RE 105 ms 3072 KB
60.txt RE 105 ms 3072 KB
61.txt RE 106 ms 3072 KB
62.txt RE 106 ms 3072 KB
63.txt AC 1 ms 2304 KB
64.txt AC 2 ms 2304 KB
65.txt AC 2 ms 2304 KB
66.txt AC 2 ms 2304 KB
67.txt AC 1 ms 2304 KB
68.txt AC 2 ms 2304 KB
69.txt AC 2 ms 2304 KB
70.txt AC 1 ms 2304 KB
71.txt AC 1 ms 2304 KB
72.txt AC 2 ms 2304 KB
s1.txt AC 2 ms 2304 KB
s2.txt AC 2 ms 2304 KB