| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 535251 |
2022-03-09T18:40:54 Z |
faik |
Pipes (BOI13_pipes) |
C++14 |
|
80 ms |
12192 KB |
#include <bits/stdc++.h>
using namespace std;
#define MOD 998244353
#define INF 1000000001
#define LNF 1000000000000000001
#define int ll
typedef long long ll;
typedef pair<int,int> pii;
void solve(){
//#define TEST
int n,m;cin >> n >> m;
if(m > n){
cout << "0";
return;
}
vector<int> net(n);
for(int i = 0;i < n;i++){
cin >> net[i];
}
vector<int> ret(m);
vector<vector<pii>> edge(n);
for(int i = 0;i < m;i++){
int a,b;cin >> a >> b;a--;b--;
edge[a].emplace_back(b,i);
edge[b].emplace_back(a,i);
}
stack<int> leaf;
vector<int> sizes(n);
vector<int> removed(n);
for(int i = 0;i < n;i++){
sizes[i] = edge[i].size();
if(edge[i].size() == 1){
leaf.push(i);
}
}
while(!leaf.empty()){
int top = leaf.top();
leaf.pop();
removed[top] = true;
pii parent;
for(auto i : edge[top]){
if(!removed[i.first])
parent = i;
}
ret[parent.second] = net[top]*2;
sizes[top]--;
sizes[parent.first]--;
net[parent.first] -= net[top];
if(sizes[parent.first] == 1){
leaf.push(parent.first);
}
}
int left = 0;
vector<int> cycle;
for(int i = 0;i < n;i++){
if(!removed[i]){
left++;
cycle.push_back(i);
}
}
if(left == 0){
for(int i : ret)
cout << i << ' ';
return;
} else if(left%2 == 0){
cout << '0';
return;
}
int curr = cycle[0];
int next;int nextRet;
for(auto i : edge[curr]){
if(!removed[i.first]){
next = i.first;
nextRet = i.second;
}
}
ret[nextRet] += 2*net[cycle[0]];
net[next] -= net[cycle[0]];
net[cycle[0]] = 0;
int last = cycle[0];
curr = next;
while(curr != cycle[0]){
pii next1;
for(auto i : edge[curr]){
if(!removed[i.first] && i.first != last){
next1 = i;
}
}
ret[next1.second] += 2*net[curr];
// cout << next1.second << ' ' << 2*net[curr] << '\n';
net[next1.first] -= net[curr];
net[curr] = 0;
last = curr;
curr = next1.first;
}
if(net[cycle[0]] % 2 != 0){
cout << 0;
return;
}
last = next;
curr = cycle[0];
int plus = 1;
bool cum = false;
// cout << '*';
// cout << net[cycle[0]];
while(curr != cycle[0] || !cum){
pii next1;
for(auto i : edge[curr]){
if(!removed[i.first] && i.first != last){
next1 = i;
}
}
ret[next1.second] += net[cycle[0]]*plus;
// cout << next1.second << ' ' << net[cycle[0]]*plus << '\n';
last = curr;
curr = next1.first;
plus = -plus;
cum = true;
}
// cout << "\n*";
for(int i : ret)
cout << i << ' ';
// cout << '\n';
// for(int i : net)
// cout << i << ' ';
}
signed main(){
cin.tie(0);
ios_base::sync_with_stdio(0);
#ifdef DEBUG
freopen("i.txt","r",stdin);
freopen("o.txt","w",stdout);
#endif
int t = 1;
#ifdef TEST
cin >> t;
#endif
while(t--){
solve();
}
return 0;
}
Compilation message
pipes.cpp: In function 'void solve()':
pipes.cpp:85:13: warning: 'nextRet' may be used uninitialized in this function [-Wmaybe-uninitialized]
85 | ret[nextRet] += 2*net[cycle[0]];
| ^
pipes.cpp:91:13: warning: 'next' may be used uninitialized in this function [-Wmaybe-uninitialized]
91 | while(curr != cycle[0]){
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 2 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 3 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 4 |
Incorrect |
59 ms |
11728 KB |
Output isn't correct |
| 5 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 6 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 7 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 8 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| 9 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 10 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 11 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 12 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 13 |
Incorrect |
44 ms |
9348 KB |
Output isn't correct |
| 14 |
Incorrect |
55 ms |
11040 KB |
Output isn't correct |
| 15 |
Incorrect |
66 ms |
11740 KB |
Output isn't correct |
| 16 |
Incorrect |
48 ms |
9924 KB |
Output isn't correct |
| 17 |
Incorrect |
57 ms |
11680 KB |
Output isn't correct |
| 18 |
Incorrect |
58 ms |
11724 KB |
Output isn't correct |
| 19 |
Incorrect |
60 ms |
11380 KB |
Output isn't correct |
| 20 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 21 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 22 |
Incorrect |
61 ms |
11772 KB |
Output isn't correct |
| 23 |
Incorrect |
44 ms |
9312 KB |
Output isn't correct |
| 24 |
Incorrect |
64 ms |
11740 KB |
Output isn't correct |
| 25 |
Incorrect |
46 ms |
9796 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
47 ms |
11072 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
0 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Correct |
0 ms |
204 KB |
Output is correct |
| 9 |
Correct |
0 ms |
204 KB |
Output is correct |
| 10 |
Correct |
0 ms |
204 KB |
Output is correct |
| 11 |
Correct |
0 ms |
204 KB |
Output is correct |
| 12 |
Correct |
0 ms |
204 KB |
Output is correct |
| 13 |
Correct |
0 ms |
204 KB |
Output is correct |
| 14 |
Correct |
1 ms |
204 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
332 KB |
Output is correct |
| 18 |
Correct |
0 ms |
204 KB |
Output is correct |
| 19 |
Correct |
0 ms |
204 KB |
Output is correct |
| 20 |
Correct |
1 ms |
204 KB |
Output is correct |
| 21 |
Correct |
0 ms |
204 KB |
Output is correct |
| 22 |
Correct |
2 ms |
332 KB |
Output is correct |
| 23 |
Correct |
48 ms |
9916 KB |
Output is correct |
| 24 |
Correct |
63 ms |
11964 KB |
Output is correct |
| 25 |
Correct |
41 ms |
11092 KB |
Output is correct |
| 26 |
Correct |
0 ms |
204 KB |
Output is correct |
| 27 |
Correct |
0 ms |
204 KB |
Output is correct |
| 28 |
Correct |
0 ms |
204 KB |
Output is correct |
| 29 |
Correct |
0 ms |
204 KB |
Output is correct |
| 30 |
Correct |
61 ms |
11636 KB |
Output is correct |
| 31 |
Correct |
65 ms |
12192 KB |
Output is correct |
| 32 |
Correct |
58 ms |
11708 KB |
Output is correct |
| 33 |
Correct |
43 ms |
11604 KB |
Output is correct |
| 34 |
Correct |
0 ms |
204 KB |
Output is correct |
| 35 |
Correct |
0 ms |
204 KB |
Output is correct |
| 36 |
Correct |
0 ms |
204 KB |
Output is correct |
| 37 |
Correct |
0 ms |
204 KB |
Output is correct |
| 38 |
Correct |
72 ms |
12072 KB |
Output is correct |
| 39 |
Correct |
80 ms |
11608 KB |
Output is correct |
| 40 |
Correct |
72 ms |
12016 KB |
Output is correct |
| 41 |
Correct |
45 ms |
12092 KB |
Output is correct |
| 42 |
Correct |
0 ms |
204 KB |
Output is correct |
| 43 |
Correct |
0 ms |
204 KB |
Output is correct |
| 44 |
Correct |
0 ms |
204 KB |
Output is correct |
| 45 |
Correct |
0 ms |
204 KB |
Output is correct |
| 46 |
Correct |
63 ms |
11700 KB |
Output is correct |
| 47 |
Correct |
63 ms |
11980 KB |
Output is correct |
| 48 |
Correct |
66 ms |
12148 KB |
Output is correct |
| 49 |
Correct |
48 ms |
10564 KB |
Output is correct |
| 50 |
Correct |
0 ms |
204 KB |
Output is correct |
| 51 |
Correct |
0 ms |
204 KB |
Output is correct |
| 52 |
Correct |
0 ms |
204 KB |
Output is correct |
| 53 |
Correct |
0 ms |
204 KB |
Output is correct |
| 54 |
Correct |
61 ms |
11776 KB |
Output is correct |
