Submission #1370389
Source Code Expand
#include <iostream> #include <vector> #define int long long using namespace std; signed main(){ int n,a[100000],sum = 0; vector<int> G[100000]; bool flag = true; cin >> n; for(int i = 0;i < n;i++) cin >> a[i]; for(int i = 0;i < n - 1;i++){ int u,v; cin >> u >> v; u--;v--; G[u].push_back(v); G[v].push_back(u); } for(int i = 0;i < n;i++){ int cnt = 0; for(int j = 0;j < G[i].size();j++) cnt += a[G[i][j]]; if(G[i].size() == 1) sum += a[i]; if(G[i].size() == 1 && cnt < a[i]) flag = false; if(G[i].size() >= 2 && cnt < a[i] * 2) flag = false; } if(sum % 2) flag = false; if(flag) cout << "YES" << endl; else cout << "NO" << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Cleaning |
User | hoget157 |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 700 Byte |
Status | WA |
Exec Time | 113 ms |
Memory | 7168 KB |
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 700 | ||||||
Status |
|
|
Set Name | Test Cases |
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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, in34.txt, in35.txt, in36.txt, in37.txt, in38.txt, in39.txt, in4.txt, in40.txt, in41.txt, in42.txt, in43.txt, in44.txt, in45.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 | 104 ms | 7040 KB |
in10.txt | AC | 101 ms | 7168 KB |
in11.txt | AC | 108 ms | 6528 KB |
in12.txt | AC | 111 ms | 6528 KB |
in13.txt | AC | 88 ms | 6528 KB |
in14.txt | AC | 86 ms | 6528 KB |
in15.txt | AC | 2 ms | 2560 KB |
in16.txt | AC | 2 ms | 2560 KB |
in17.txt | AC | 2 ms | 2560 KB |
in18.txt | AC | 2 ms | 2560 KB |
in19.txt | AC | 101 ms | 7040 KB |
in2.txt | AC | 100 ms | 7040 KB |
in20.txt | AC | 105 ms | 7040 KB |
in21.txt | AC | 103 ms | 7168 KB |
in22.txt | AC | 104 ms | 7040 KB |
in23.txt | WA | 103 ms | 7168 KB |
in24.txt | WA | 101 ms | 7168 KB |
in25.txt | WA | 2 ms | 2560 KB |
in26.txt | AC | 112 ms | 7040 KB |
in27.txt | AC | 113 ms | 7168 KB |
in28.txt | AC | 2 ms | 2560 KB |
in29.txt | AC | 89 ms | 7040 KB |
in3.txt | AC | 103 ms | 7040 KB |
in30.txt | AC | 2 ms | 2560 KB |
in31.txt | WA | 105 ms | 7040 KB |
in32.txt | WA | 107 ms | 7168 KB |
in33.txt | AC | 102 ms | 7168 KB |
in34.txt | AC | 101 ms | 7168 KB |
in35.txt | WA | 100 ms | 7168 KB |
in36.txt | WA | 101 ms | 7168 KB |
in37.txt | WA | 3 ms | 2688 KB |
in38.txt | WA | 100 ms | 7040 KB |
in39.txt | WA | 101 ms | 7168 KB |
in4.txt | AC | 101 ms | 7168 KB |
in40.txt | WA | 101 ms | 7040 KB |
in41.txt | WA | 101 ms | 7040 KB |
in42.txt | AC | 102 ms | 7040 KB |
in43.txt | AC | 98 ms | 7168 KB |
in44.txt | WA | 100 ms | 7040 KB |
in45.txt | AC | 101 ms | 7040 KB |
in5.txt | AC | 100 ms | 7040 KB |
in6.txt | AC | 102 ms | 7040 KB |
in7.txt | AC | 90 ms | 6656 KB |
in8.txt | AC | 25 ms | 3712 KB |
in9.txt | AC | 101 ms | 7168 KB |
sample1.txt | AC | 2 ms | 2560 KB |
sample2.txt | AC | 2 ms | 2560 KB |
sample3.txt | AC | 2 ms | 2560 KB |