Submission #1778864
Source Code Expand
#include <cstdio> #include <cstdlib> #include <cstring> #include <iostream> #include <algorithm> typedef long long ll ; #define rep(i, a, b) for (int i = a; i <= b; ++ i) const int N = 1e5 + 5 ; using namespace std ; int n, e, lnk[N], nxt[N << 1], ter[N << 1] ; void add(int x, int y) { ter[++ e] = y, nxt[e] = lnk[x], lnk[x] = e ; } int dfs(int p, int las) { int cnt = 0 ; for (int i = lnk[p] ; i; i = nxt[i]) if (ter[i] != las) { cnt += dfs(ter[i], p) ; } if (cnt == 0) return 1 ; else if (cnt > 1) return 2 ; else return 0 ; } int main() { for ( ; scanf("%d", &n) != EOF ; ) { rep(i, 1, n) lnk[i] = 0 ; rep(i, 1, e) nxt[i] = 0 ; e = 0 ; int x, y ; rep(i, 1, n - 1) { scanf("%d%d", &x, &y) ; add(x, y), add(y, x) ; } if (!dfs(1, 0)) printf("Second\n") ; else printf("First\n") ; } return 0 ; }
Submission Info
Submission Time | |
---|---|
Task | D - Black and White Tree |
User | mjy0724 |
Language | C++14 (GCC 5.4.1) |
Score | 900 |
Code Size | 868 Byte |
Status | AC |
Exec Time | 22 ms |
Memory | 2176 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:32:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y) ; ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 900 / 900 | ||||
Status |
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|
Set Name | Test Cases |
---|---|
Sample | sample1.txt, sample2.txt, sample3.txt |
All | sample1.txt, sample2.txt, sample3.txt, in1.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in2.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in28.txt, in29.txt, in3.txt, in30.txt, in31.txt, in32.txt, in33.txt, in4.txt, in5.txt, in6.txt, in7.txt, in8.txt, in9.txt, sample1.txt, sample2.txt, sample3.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
in1.txt | AC | 21 ms | 2176 KB |
in10.txt | AC | 21 ms | 2176 KB |
in11.txt | AC | 22 ms | 2176 KB |
in12.txt | AC | 3 ms | 512 KB |
in13.txt | AC | 22 ms | 2176 KB |
in14.txt | AC | 22 ms | 2176 KB |
in15.txt | AC | 22 ms | 2176 KB |
in16.txt | AC | 22 ms | 2176 KB |
in17.txt | AC | 22 ms | 2176 KB |
in18.txt | AC | 22 ms | 2176 KB |
in19.txt | AC | 22 ms | 2176 KB |
in2.txt | AC | 21 ms | 2176 KB |
in20.txt | AC | 22 ms | 2176 KB |
in21.txt | AC | 22 ms | 2176 KB |
in22.txt | AC | 21 ms | 2176 KB |
in23.txt | AC | 22 ms | 2176 KB |
in24.txt | AC | 22 ms | 2176 KB |
in25.txt | AC | 22 ms | 2176 KB |
in26.txt | AC | 22 ms | 2176 KB |
in27.txt | AC | 22 ms | 2176 KB |
in28.txt | AC | 1 ms | 256 KB |
in29.txt | AC | 22 ms | 2176 KB |
in3.txt | AC | 22 ms | 2176 KB |
in30.txt | AC | 22 ms | 2176 KB |
in31.txt | AC | 22 ms | 2176 KB |
in32.txt | AC | 22 ms | 2176 KB |
in33.txt | AC | 22 ms | 2176 KB |
in4.txt | AC | 22 ms | 2176 KB |
in5.txt | AC | 21 ms | 2176 KB |
in6.txt | AC | 21 ms | 2176 KB |
in7.txt | AC | 22 ms | 2176 KB |
in8.txt | AC | 22 ms | 2176 KB |
in9.txt | AC | 22 ms | 2176 KB |
sample1.txt | AC | 1 ms | 256 KB |
sample2.txt | AC | 1 ms | 256 KB |
sample3.txt | AC | 1 ms | 256 KB |