Submission #1220745


Source Code Expand

#include <bits/stdc++.h>
#define mset(a,b) memset(a,b,sizeof a)
#define mcpy(a,b) memcpy(a,b,sizeof b)
#define max(a,b) ((a)<(b)?(b):(a))
#define swap(a,b) a^=b^=a^=b
#define lb(x) ((x)&(-(x)))
#define inf 0x3f3f3f3f
#define N 100010
using namespace std;
typedef long long ll;
int n,d[N],mx,pos;
vector<int> g[N];
inline void dfs(int x,int p){
	for(int i=0;i<g[x].size();i++){
		int th=g[x][i];
		if(th^p)d[th]=d[x]+1,dfs(th,x);
	}
}
int main(){
	cin>>n;
	for(int i=1,a,b;i<n;i++)scanf("%d%d",&a,&b),g[a].push_back(b),g[b].push_back(a);
	dfs(1,0);
	for(int i=1;i<=n;i++)if(mx<d[i])mx=d[pos=i];
	d[pos]=0,dfs(pos,0);
	mx=0;
	for(int i=1;i<=n;i++)mx=max(mx,d[i]);
	printf("%d",((mx+1)>>1)-1);
	return 0;
}

Submission Info

Submission Time
Task D - Uninity
User cdsfcesf
Language C++14 (GCC 5.4.1)
Score 0
Code Size 731 Byte
Status WA
Exec Time 50 ms
Memory 10112 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:21:81: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1,a,b;i<n;i++)scanf("%d%d",&a,&b),g[a].push_back(b),g[b].push_back(a);
                                                                                 ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 1400
Status
AC × 2
AC × 6
WA × 68
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 WA 43 ms 6272 KB
02.txt WA 44 ms 6272 KB
03.txt WA 45 ms 6272 KB
04.txt WA 44 ms 6272 KB
05.txt WA 44 ms 6272 KB
06.txt WA 44 ms 6272 KB
07.txt WA 44 ms 6272 KB
08.txt WA 44 ms 6272 KB
09.txt WA 31 ms 7552 KB
10.txt WA 31 ms 7552 KB
11.txt WA 16 ms 4992 KB
12.txt WA 16 ms 4992 KB
13.txt WA 48 ms 10112 KB
14.txt WA 43 ms 9344 KB
15.txt WA 48 ms 8704 KB
16.txt WA 47 ms 8064 KB
17.txt WA 30 ms 6520 KB
18.txt WA 30 ms 6516 KB
19.txt WA 33 ms 6656 KB
20.txt WA 33 ms 6656 KB
21.txt AC 34 ms 6528 KB
22.txt WA 35 ms 6528 KB
23.txt WA 30 ms 6520 KB
24.txt WA 30 ms 6520 KB
25.txt AC 36 ms 6396 KB
26.txt WA 38 ms 6400 KB
27.txt WA 38 ms 6400 KB
28.txt WA 40 ms 6400 KB
29.txt WA 41 ms 6400 KB
30.txt WA 45 ms 6400 KB
31.txt WA 48 ms 6400 KB
32.txt WA 43 ms 6272 KB
33.txt WA 44 ms 6272 KB
34.txt WA 44 ms 6272 KB
35.txt WA 44 ms 6272 KB
36.txt WA 45 ms 6272 KB
37.txt WA 45 ms 6272 KB
38.txt WA 44 ms 6144 KB
39.txt WA 45 ms 6144 KB
40.txt WA 44 ms 6272 KB
41.txt WA 44 ms 6272 KB
42.txt WA 45 ms 6144 KB
43.txt WA 45 ms 6144 KB
44.txt WA 37 ms 6656 KB
45.txt WA 37 ms 6656 KB
46.txt WA 40 ms 6656 KB
47.txt WA 38 ms 6656 KB
48.txt WA 41 ms 6528 KB
49.txt WA 41 ms 6528 KB
50.txt WA 44 ms 6400 KB
51.txt WA 45 ms 6400 KB
52.txt WA 45 ms 6272 KB
53.txt WA 46 ms 6272 KB
54.txt WA 46 ms 6272 KB
55.txt WA 46 ms 6144 KB
56.txt WA 30 ms 6520 KB
57.txt WA 40 ms 8316 KB
58.txt WA 41 ms 8316 KB
59.txt WA 49 ms 6272 KB
60.txt WA 50 ms 6272 KB
61.txt WA 34 ms 7032 KB
62.txt WA 34 ms 7032 KB
63.txt AC 2 ms 2560 KB
64.txt WA 2 ms 2560 KB
65.txt WA 2 ms 2560 KB
66.txt WA 2 ms 2560 KB
67.txt AC 2 ms 2560 KB
68.txt WA 2 ms 2560 KB
69.txt WA 2 ms 2560 KB
70.txt WA 2 ms 2560 KB
71.txt WA 2 ms 2560 KB
72.txt WA 2 ms 2560 KB
s1.txt AC 2 ms 2560 KB
s2.txt AC 2 ms 2560 KB