| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 631404 |
2022-08-18T05:37:16 Z |
socpite |
Pipes (BOI13_pipes) |
C++17 |
|
133 ms |
131072 KB |
#include<bits/stdc++.h>
using namespace std;
#define f first
#define s second
const int maxn = 1e5+5;
typedef long long ll;
ll lim = 1;
int _s, _t;
int n, m;
vector<int> idx, vert;
int vis[maxn], oncyc[maxn];
ll val[maxn], ans[maxn], A[maxn];
vector<pair<int, int>> graph[maxn];
void find_ep(int x, int p){
assert(!vis[x]);
vis[x]=1;
for(auto v: graph[x]){
if(v.f == p)continue;
if(vis[v.f]){
if(!_s){
_s = x;
_t = v.f;
idx.push_back(v.s);
}
}
else find_ep(v.f, x);
}
}
void find_cyc(int x, int p){
if(x == _t)oncyc[x]=1;
else{
for(auto v: graph[x]){
if(v.f == p || (x == _s && v.f == _t) || (x == _t && v.f == _s))continue;
find_cyc(v.f, x);
if(oncyc[v.f]){
idx.push_back(v.s);
oncyc[x]=1;
break;
}
}
}
if(oncyc[x])vert.push_back(x);
}
void solve(int x, int p){
for(auto v: graph[x]){
if(v.f == p || oncyc[v.f])continue;
solve(v.f, p);
ans[v.s]=val[v.f];
val[x]-=val[v.f];
}
}
void dfs(int x, int p){
//cout << x << endl;
for(auto v: graph[x]){
if(v.f == p)continue;
dfs(v.f, x);
ans[v.s]=val[v.f];
val[x]-=val[v.f];
}
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n >> m;
if(m > n){
cout << 0;
return 0;
}
for(int i = 1; i <= n; i++)cin >> val[i];
for(int i = 1; i <= m; i++){
int a, b;
cin >> a >> b;
graph[a].push_back({b, i});
graph[b].push_back({a, i});
}
if(m == n){
find_ep(1, 0);
find_cyc(_s, 0);
if(!(vert.size()&1)){
cout << 0;
return 0;
}
assert(vert.size() == idx.size());
ll sum = 0;
for(auto v: vert){
solve(v, 0);
sum += val[v];
}
sum/=2;
for(int i = 1; i < vert.size(); i+=2)sum-=val[vert[i]];
ans[idx[0]] = sum;
for(int i = 1; i < idx.size(); i++)ans[idx[i]] = val[vert[i-1]]-ans[idx[i-1]];
}
else{
dfs(1, 0);
}
for(int i = 1; i <= m; i++)cout << ans[i]*2 << "\n";
}
Compilation message
pipes.cpp: In function 'int main()':
pipes.cpp:103:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
103 | for(int i = 1; i < vert.size(); i+=2)sum-=val[vert[i]];
| ~~^~~~~~~~~~~~~
pipes.cpp:105:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
105 | for(int i = 1; i < idx.size(); i++)ans[idx[i]] = val[vert[i-1]]-ans[idx[i-1]];
| ~~^~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 4 |
Correct |
48 ms |
8360 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 6 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 7 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
3 ms |
2772 KB |
Output is correct |
| 13 |
Correct |
46 ms |
7228 KB |
Output is correct |
| 14 |
Correct |
44 ms |
8048 KB |
Output is correct |
| 15 |
Correct |
49 ms |
8448 KB |
Output is correct |
| 16 |
Correct |
43 ms |
7436 KB |
Output is correct |
| 17 |
Correct |
52 ms |
8300 KB |
Output is correct |
| 18 |
Correct |
53 ms |
8348 KB |
Output is correct |
| 19 |
Correct |
56 ms |
11748 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 22 |
Correct |
48 ms |
8304 KB |
Output is correct |
| 23 |
Correct |
39 ms |
7212 KB |
Output is correct |
| 24 |
Correct |
55 ms |
8312 KB |
Output is correct |
| 25 |
Correct |
40 ms |
7380 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
64 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Runtime error |
68 ms |
131072 KB |
Execution killed with signal 9 |
| 3 |
Correct |
60 ms |
11460 KB |
Output is correct |
| 4 |
Correct |
3 ms |
2644 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 6 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 7 |
Runtime error |
61 ms |
131072 KB |
Execution killed with signal 9 |
| 8 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 10 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2600 KB |
Output is correct |
| 14 |
Runtime error |
75 ms |
131072 KB |
Execution killed with signal 9 |
| 15 |
Runtime error |
72 ms |
131072 KB |
Execution killed with signal 9 |
| 16 |
Runtime error |
61 ms |
131072 KB |
Execution killed with signal 9 |
| 17 |
Correct |
2 ms |
2772 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2608 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 22 |
Runtime error |
57 ms |
131072 KB |
Execution killed with signal 9 |
| 23 |
Runtime error |
103 ms |
131072 KB |
Execution killed with signal 9 |
| 24 |
Runtime error |
105 ms |
131072 KB |
Execution killed with signal 9 |
| 25 |
Correct |
49 ms |
11416 KB |
Output is correct |
| 26 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 28 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 29 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 30 |
Runtime error |
133 ms |
131072 KB |
Execution killed with signal 9 |
| 31 |
Runtime error |
117 ms |
131072 KB |
Execution killed with signal 9 |
| 32 |
Runtime error |
101 ms |
131072 KB |
Execution killed with signal 9 |
| 33 |
Correct |
58 ms |
12504 KB |
Output is correct |
| 34 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 35 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 36 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 37 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 38 |
Runtime error |
120 ms |
131072 KB |
Execution killed with signal 9 |
| 39 |
Runtime error |
102 ms |
131072 KB |
Execution killed with signal 9 |
| 40 |
Runtime error |
103 ms |
131072 KB |
Execution killed with signal 9 |
| 41 |
Correct |
81 ms |
15204 KB |
Output is correct |
| 42 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 43 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 44 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 45 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 46 |
Runtime error |
110 ms |
131072 KB |
Execution killed with signal 9 |
| 47 |
Runtime error |
110 ms |
131072 KB |
Execution killed with signal 9 |
| 48 |
Runtime error |
110 ms |
131072 KB |
Execution killed with signal 9 |
| 49 |
Correct |
52 ms |
8908 KB |
Output is correct |
| 50 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 51 |
Correct |
2 ms |
2644 KB |
Output is correct |
| 52 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 53 |
Correct |
1 ms |
2644 KB |
Output is correct |
| 54 |
Runtime error |
103 ms |
131072 KB |
Execution killed with signal 9 |
