Submission #2124277


Source Code Expand

#include<cstdio>
#include<vector>
using namespace std;
const int maxn=100000;
int n,f[maxn+10];
vector<int> g[maxn+10];
void dfs(int x,int fa){
	bool isb=0;
	for(int i=0;i<g[x].size();++i){
		int e=g[x][i]; if(e!=fa){
			dfs(e,x); f[x]+=f[e];
			if(!f[e]) if(!isb) isb=1; else ++f[x];
		}
	}
}
int main(){
	scanf("%d",&n);
	for(int i=1;i<n;++i){
		int l,r; scanf("%d%d",&l,&r); ++l; ++r;
		g[l].push_back(r); g[r].push_back(l);
	}
	for(int i=1;i<=n;++i) if(g[i].size()>2){
		dfs(i,0); printf("%d",f[i]); return 0;
	}
	printf("1");
}

Submission Info

Submission Time
Task E - Antennas on Tree
User nqiiii
Language C++14 (GCC 5.4.1)
Score 900
Code Size 557 Byte
Status AC
Exec Time 42 ms
Memory 10368 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:17:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:19:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   int l,r; scanf("%d%d",&l,&r); ++l; ++r;
                               ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 900 / 900
Status
AC × 3
AC × 26
Set Name Test Cases
Sample 0_00.txt, 0_01.txt, 0_02.txt
All 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 1_18.txt, 1_19.txt, 1_20.txt, 1_21.txt, 1_22.txt
Case Name Status Exec Time Memory
0_00.txt AC 2 ms 2560 KB
0_01.txt AC 2 ms 2560 KB
0_02.txt AC 2 ms 2560 KB
1_00.txt AC 2 ms 2560 KB
1_01.txt AC 2 ms 2560 KB
1_02.txt AC 2 ms 2560 KB
1_03.txt AC 2 ms 2560 KB
1_04.txt AC 2 ms 2560 KB
1_05.txt AC 2 ms 2560 KB
1_06.txt AC 34 ms 5760 KB
1_07.txt AC 28 ms 6136 KB
1_08.txt AC 33 ms 5760 KB
1_09.txt AC 28 ms 6136 KB
1_10.txt AC 42 ms 10368 KB
1_11.txt AC 40 ms 8064 KB
1_12.txt AC 38 ms 6400 KB
1_13.txt AC 40 ms 6144 KB
1_14.txt AC 39 ms 6144 KB
1_15.txt AC 39 ms 6144 KB
1_16.txt AC 39 ms 6144 KB
1_17.txt AC 39 ms 6272 KB
1_18.txt AC 35 ms 6400 KB
1_19.txt AC 34 ms 6656 KB
1_20.txt AC 33 ms 6528 KB
1_21.txt AC 33 ms 6400 KB
1_22.txt AC 31 ms 6136 KB