Submission #1575265
Source Code Expand
#include <bits/stdc++.h> using namespace std; typedef long long ll; const int TAM = 100004; vector <ll> adj [TAM]; ll val [TAM], pt [TAM]; int n; void form( int x ){ int nxt; for( int i = 0 ; i < adj[x].size() ; i ++ ){ nxt = adj[x][i]; if( nxt == pt[x] ) continue; pt[nxt] = x; //cout << " parent " << nxt << " = " << pt[nxt] << endl ; form(nxt); } } ll dn, up; void solve ( ll cap , ll sum ){ dn = sum - cap; up = cap - dn; } bool pos = 1; ll find_up( int x ){ //cout << " IN " << x << endl ; if( adj[x].size() == 1 ) return val[x]; ll sum = 0, cap = val[x]; int nxt; ll v; for( int i = 0 ; i < adj[x].size() ; i ++ ){ nxt = adj[x][i]; if( nxt == pt[x] ) continue; v = find_up(nxt); sum += v; //cout << x << " -> " << nxt << " = " << v << endl ; } solve( cap , sum ); if( dn + up != cap or dn < 0 or up < 0 ) pos = 0; return up; } int main(){ int a, b; scanf("%d",&n); for( int i = 1 ; i <= n ; i ++ ) scanf("%lld",&val[i]); for( int i = 0 ; i < n-1 ; i ++ ){ scanf("%d%d",&a,&b); adj[a].push_back(b); adj[b].push_back(a); } int rt; for( int i = 1 ; i <= n ; i ++ ){ if( adj[i].size() > 1 ){ pt [i] = i; form(i); rt = i; break; } } if( !find_up(rt) and pos ) printf("YES\n"); else printf("NO\n"); return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Cleaning |
User | andresrperezr |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1572 Byte |
Status | WA |
Exec Time | 57 ms |
Memory | 12672 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:50:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ ./Main.cpp:52:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&val[i]); ^ ./Main.cpp:54:28: 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 | 52 ms | 7936 KB |
in10.txt | AC | 53 ms | 7936 KB |
in11.txt | AC | 54 ms | 11648 KB |
in12.txt | AC | 54 ms | 11648 KB |
in13.txt | AC | 56 ms | 12672 KB |
in14.txt | AC | 51 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 | WA | 2 ms | 2560 KB |
in19.txt | WA | 53 ms | 7936 KB |
in2.txt | AC | 53 ms | 7936 KB |
in20.txt | WA | 54 ms | 7936 KB |
in21.txt | WA | 53 ms | 7936 KB |
in22.txt | WA | 53 ms | 7936 KB |
in23.txt | AC | 53 ms | 7936 KB |
in24.txt | AC | 53 ms | 7936 KB |
in25.txt | AC | 2 ms | 2560 KB |
in26.txt | AC | 55 ms | 7936 KB |
in27.txt | AC | 55 ms | 7936 KB |
in28.txt | AC | 2 ms | 2560 KB |
in29.txt | AC | 51 ms | 7936 KB |
in3.txt | AC | 53 ms | 7936 KB |
in30.txt | AC | 2 ms | 2560 KB |
in31.txt | AC | 57 ms | 7936 KB |
in32.txt | AC | 57 ms | 7936 KB |
in33.txt | AC | 53 ms | 7936 KB |
in34.txt | AC | 52 ms | 7936 KB |
in35.txt | AC | 53 ms | 7936 KB |
in36.txt | AC | 53 ms | 7936 KB |
in37.txt | AC | 3 ms | 2688 KB |
in38.txt | AC | 53 ms | 7936 KB |
in39.txt | AC | 53 ms | 7936 KB |
in4.txt | AC | 53 ms | 7936 KB |
in40.txt | AC | 53 ms | 7936 KB |
in41.txt | AC | 52 ms | 7936 KB |
in42.txt | AC | 53 ms | 7936 KB |
in43.txt | AC | 52 ms | 7936 KB |
in44.txt | WA | 53 ms | 7936 KB |
in45.txt | AC | 52 ms | 7936 KB |
in5.txt | AC | 53 ms | 7936 KB |
in6.txt | AC | 53 ms | 7936 KB |
in7.txt | AC | 47 ms | 7296 KB |
in8.txt | AC | 13 ms | 3840 KB |
in9.txt | AC | 53 ms | 7936 KB |
sample1.txt | AC | 2 ms | 2560 KB |
sample2.txt | AC | 2 ms | 2560 KB |
sample3.txt | AC | 2 ms | 2560 KB |