Submission #1575157
Source Code Expand
#include <bits/stdc++.h> #define pb push_back using namespace std; typedef vector<int> vi; #define TAM 100100 int A[TAM]; vi G[TAM]; bool ok ( int i, int pi = -1 ) { if ( G[i].size() == 1 ) return true; int sum = 0, maxAj = 0; for ( int j : G[i] ) if ( j != pi ) { if ( !ok(j, i) ) return false; sum += A[j]; maxAj = max ( maxAj, A[j] ); } // x + A[i] = sum int x = sum - A[i]; if ( x < 0 || maxAj > x + A[i] ) return false; A[i] -= x; return true; } int main() { int n; scanf ( "%d", &n ); for ( int i = 1; i <= n; ++i ) scanf ( "%d", A+i ); for ( int edges = n-1, a, b; edges--; ) { scanf ( "%d%d", &a, &b ); G[a].pb ( b ); G[b].pb ( a ); } if ( n == 2 ) { puts ( A[1] == A[2] ? "YES" : "NO" ); return 0; } int root = 1; while ( G[root].size() == 1 ) root++; if ( ok(root) && A[root] == 0 ) puts ("YES"); else puts("NO"); return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Cleaning |
User | vjudge2 |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 952 Byte |
Status | WA |
Exec Time | 49 ms |
Memory | 12800 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:35:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d", &n ); ^ ./Main.cpp:37:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d", A+i ); ^ ./Main.cpp:39:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d%d", &a, &b ); ^
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 700 | ||||||
Status |
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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 | 47 ms | 6268 KB |
in10.txt | AC | 46 ms | 6272 KB |
in11.txt | AC | 48 ms | 11520 KB |
in12.txt | AC | 49 ms | 11520 KB |
in13.txt | AC | 45 ms | 12800 KB |
in14.txt | AC | 45 ms | 11904 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 | WA | 47 ms | 6272 KB |
in2.txt | AC | 47 ms | 6272 KB |
in20.txt | WA | 47 ms | 6272 KB |
in21.txt | WA | 47 ms | 6272 KB |
in22.txt | WA | 46 ms | 6272 KB |
in23.txt | AC | 45 ms | 6272 KB |
in24.txt | AC | 44 ms | 6272 KB |
in25.txt | WA | 2 ms | 2560 KB |
in26.txt | AC | 45 ms | 6272 KB |
in27.txt | AC | 45 ms | 6272 KB |
in28.txt | AC | 2 ms | 2560 KB |
in29.txt | AC | 41 ms | 6272 KB |
in3.txt | AC | 46 ms | 6272 KB |
in30.txt | AC | 2 ms | 2560 KB |
in31.txt | AC | 46 ms | 6272 KB |
in32.txt | AC | 44 ms | 6272 KB |
in33.txt | AC | 46 ms | 6272 KB |
in34.txt | AC | 46 ms | 6272 KB |
in35.txt | AC | 47 ms | 6272 KB |
in36.txt | AC | 47 ms | 6272 KB |
in37.txt | WA | 3 ms | 2560 KB |
in38.txt | WA | 46 ms | 6272 KB |
in39.txt | WA | 47 ms | 6272 KB |
in4.txt | AC | 46 ms | 6272 KB |
in40.txt | WA | 46 ms | 6272 KB |
in41.txt | WA | 46 ms | 6272 KB |
in42.txt | AC | 46 ms | 6272 KB |
in43.txt | AC | 45 ms | 6272 KB |
in44.txt | WA | 46 ms | 6272 KB |
in45.txt | AC | 46 ms | 6272 KB |
in5.txt | AC | 46 ms | 6272 KB |
in6.txt | AC | 46 ms | 6272 KB |
in7.txt | AC | 41 ms | 5888 KB |
in8.txt | AC | 12 ms | 3456 KB |
in9.txt | AC | 46 ms | 6272 KB |
sample1.txt | AC | 2 ms | 2560 KB |
sample2.txt | AC | 2 ms | 2560 KB |
sample3.txt | AC | 2 ms | 2560 KB |