#include <bits/stdc++.h>
using namespace std ;
const int MAX = 1e5 + 10 ;
vector< vector<int> >adj(MAX) ;
int n , m ;
int dep[MAX], P[MAX] , arr[MAX] ;
vector< pair<int , int> >vp ;
map< pair<int , int> , int>mp ;
void dfs1(int node , int par , int lvl)
{
P[node] = par ;
dep[node] = lvl ;
for(auto &child : adj[node])
{
if(child == par)
continue ;
dfs1(child , node , lvl+1) ;
}
return ;
}
void solve1()
{
dfs1(1 , -1 , 0) ;
vector< vector<int> >v(n+1) ;
for(int i = 1 ; i <= n ; ++i)
v[dep[i]].push_back(i) ;
for(int i = n ; i >= 1 ; --i)
{
for(auto &node : v[i])
{
int a = min(node , P[node]) , b = max(node , P[node]) ;
mp[{a , b}] = arr[node] ;
arr[P[node]] -= arr[node] ;
}
}
for(auto &i : vp)
{
int a = min(i.first , i.second) ;
int b = max(i.first , i.second) ;
cout<<mp[{a , b}] * 2<<"\n" ;
}
return ;
}
void solve2()
{
cout<<0<<"\n" ;
return ;
}
int main()
{
ios_base::sync_with_stdio(0) ;
cin.tie(0) ;
cin>>n>>m ;
if(m > n)
return cout<<0<<"\n" , 0 ;
for(int i = 1 ; i <= n ; ++i)
cin>>arr[i] ;
for(int i = 0 ; i < m ; ++i)
{
int x , y ;
cin>>x>>y ;
adj[x].push_back(y) ;
adj[y].push_back(x) ;
vp.push_back({x , y}) ;
}
if(m == n-1)
solve1() ;
else
solve2() ;
return 0 ;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 2 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 3 |
Correct |
5 ms |
2808 KB |
Output is correct |
| 4 |
Correct |
125 ms |
18928 KB |
Output is correct |
| 5 |
Correct |
4 ms |
2748 KB |
Output is correct |
| 6 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 7 |
Correct |
4 ms |
2780 KB |
Output is correct |
| 8 |
Correct |
4 ms |
2780 KB |
Output is correct |
| 9 |
Correct |
5 ms |
2808 KB |
Output is correct |
| 10 |
Correct |
5 ms |
2936 KB |
Output is correct |
| 11 |
Correct |
5 ms |
2936 KB |
Output is correct |
| 12 |
Correct |
5 ms |
2936 KB |
Output is correct |
| 13 |
Correct |
107 ms |
15724 KB |
Output is correct |
| 14 |
Correct |
131 ms |
18072 KB |
Output is correct |
| 15 |
Correct |
138 ms |
19016 KB |
Output is correct |
| 16 |
Correct |
112 ms |
16552 KB |
Output is correct |
| 17 |
Correct |
153 ms |
18944 KB |
Output is correct |
| 18 |
Correct |
140 ms |
19004 KB |
Output is correct |
| 19 |
Correct |
176 ms |
22252 KB |
Output is correct |
| 20 |
Correct |
4 ms |
2556 KB |
Output is correct |
| 21 |
Correct |
5 ms |
2936 KB |
Output is correct |
| 22 |
Correct |
143 ms |
19052 KB |
Output is correct |
| 23 |
Correct |
110 ms |
15596 KB |
Output is correct |
| 24 |
Correct |
132 ms |
19024 KB |
Output is correct |
| 25 |
Correct |
119 ms |
16336 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
2684 KB |
Output isn't correct |
| 2 |
Incorrect |
5 ms |
2792 KB |
Output isn't correct |
| 3 |
Correct |
55 ms |
8312 KB |
Output is correct |
| 4 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 5 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 6 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 7 |
Incorrect |
4 ms |
2680 KB |
Output isn't correct |
| 8 |
Incorrect |
4 ms |
2680 KB |
Output isn't correct |
| 9 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 10 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 11 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 12 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 13 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 14 |
Incorrect |
4 ms |
2680 KB |
Output isn't correct |
| 15 |
Incorrect |
4 ms |
2808 KB |
Output isn't correct |
| 16 |
Incorrect |
5 ms |
2808 KB |
Output isn't correct |
| 17 |
Correct |
4 ms |
2808 KB |
Output is correct |
| 18 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 19 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 20 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 21 |
Correct |
5 ms |
2680 KB |
Output is correct |
| 22 |
Incorrect |
4 ms |
2680 KB |
Output isn't correct |
| 23 |
Incorrect |
54 ms |
7664 KB |
Output isn't correct |
| 24 |
Incorrect |
64 ms |
8684 KB |
Output isn't correct |
| 25 |
Correct |
63 ms |
8428 KB |
Output is correct |
| 26 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 27 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 28 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 29 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 30 |
Incorrect |
59 ms |
8488 KB |
Output isn't correct |
| 31 |
Incorrect |
57 ms |
8512 KB |
Output isn't correct |
| 32 |
Incorrect |
60 ms |
8684 KB |
Output isn't correct |
| 33 |
Correct |
59 ms |
8672 KB |
Output is correct |
| 34 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 35 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 36 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 37 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 38 |
Incorrect |
63 ms |
8528 KB |
Output isn't correct |
| 39 |
Incorrect |
65 ms |
8556 KB |
Output isn't correct |
| 40 |
Incorrect |
61 ms |
8556 KB |
Output isn't correct |
| 41 |
Correct |
64 ms |
8668 KB |
Output is correct |
| 42 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 43 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 44 |
Correct |
5 ms |
2680 KB |
Output is correct |
| 45 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 46 |
Incorrect |
59 ms |
8528 KB |
Output isn't correct |
| 47 |
Incorrect |
65 ms |
8656 KB |
Output isn't correct |
| 48 |
Incorrect |
64 ms |
8696 KB |
Output isn't correct |
| 49 |
Correct |
56 ms |
8428 KB |
Output is correct |
| 50 |
Correct |
5 ms |
2680 KB |
Output is correct |
| 51 |
Correct |
5 ms |
2680 KB |
Output is correct |
| 52 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 53 |
Correct |
5 ms |
2680 KB |
Output is correct |
| 54 |
Incorrect |
58 ms |
8556 KB |
Output isn't correct |
