| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 253845 |
2020-07-28T22:10:41 Z |
aZvezda |
Pipes (BOI13_pipes) |
C++14 |
|
1000 ms |
31096 KB |
#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#define endl "\n"
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const ll mod = 1e9 + 7;
template<class T> inline void fix(T &x) {if(x >= mod | x <= -mod) {x %= mod;} if(x < 0) {x += mod;}}
#define out(x) cout << __LINE__ << ": " << (#x) << " = " << (x) << endl
//If we have an even cycle then we can add 1 on odd edges and -1 on even edges so the solutions stay the same. We can remove leaves one by one
const ll MAX_N = 1e5 + 10;
set<pair<ll, ll> > g[MAX_N];
ll ans[MAX_N], arr[MAX_N];
struct cmp {
bool operator ()(const ll &a, const ll &b) const {
if(g[a].size() == g[b].size()) {
return a < b;
}
return g[a].size() < g[b].size();
}
};
multiset<ll, cmp> pq;
void removeBranches() {
while(!pq.empty() && g[*(pq.begin())].size() == 1) {
ll curr = *(pq.begin()); pq.erase(pq.begin());
auto other = *(g[curr].begin());
pq.erase(other.first);
ans[other.second] = 2 * arr[curr];
arr[other.first] -= arr[curr];
g[other.first].erase({curr, other.second});
pq.insert(other.first);
}
}
int rret = 0;
void dfs(int x, int p, int start, int flag) {
rret += arr[x] * flag;
//cout << x << " " << p << " " << ans[x] << " " << rret << endl;
for(auto it : g[x]) {
if(it.first == p || it.first == start) {continue;}
dfs(it.first, x, start, -flag);
}
}
void removeCycle() {
if(pq.empty()) {return;}
auto now = pq.begin();
if(g[*now].size() > 2) {
cout << 0 << endl;
exit(0);
}
now = pq.end(); now --;
if(g[*now].size() > 2) {
cout << 0 << endl;
exit(0);
}
if(pq.size() % 2 == 0) {
cout << 0 << endl;
exit(0);
}
int curr = *(pq.begin());
dfs(curr, (*(g[curr].begin())).first, curr, 1);
rret /= 2;
auto sec = (g[curr].begin());
arr[curr] -= rret;
arr[(*sec).first] -= rret;
ans[(*sec).second] = rret;
g[curr].erase(sec);
g[(*sec).first].erase({curr, (*sec).second});
//cout << curr << " " << (*sec).first << " " << rret << endl;
}
signed main() {
ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
ll n, m;
cin >> n >> m;
if(m > n) {cout << 0 << endl; return 0;}
for(ll i = 1; i <= n; i ++) {
cin >> arr[i];
}
for(ll i = 0; i < m; i ++) {
ll a, b;
cin >> a >> b;
g[a].insert({b, i});
g[b].insert({a, i});
}
for(ll i = 1; i <= n; i ++) {
pq.insert(i);
}
removeBranches();
removeCycle();
removeBranches();
for(ll i = 0; i < m; i ++) {
cout << ans[i] << endl;
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1092 ms |
4992 KB |
Time limit exceeded |
| 2 |
Execution timed out |
1093 ms |
4992 KB |
Time limit exceeded |
| 3 |
Execution timed out |
1093 ms |
5248 KB |
Time limit exceeded |
| 4 |
Execution timed out |
1072 ms |
23672 KB |
Time limit exceeded |
| 5 |
Execution timed out |
1097 ms |
4992 KB |
Time limit exceeded |
| 6 |
Execution timed out |
1085 ms |
4992 KB |
Time limit exceeded |
| 7 |
Execution timed out |
1099 ms |
4992 KB |
Time limit exceeded |
| 8 |
Execution timed out |
1099 ms |
4992 KB |
Time limit exceeded |
| 9 |
Execution timed out |
1099 ms |
5248 KB |
Time limit exceeded |
| 10 |
Execution timed out |
1100 ms |
5248 KB |
Time limit exceeded |
| 11 |
Execution timed out |
1099 ms |
5248 KB |
Time limit exceeded |
| 12 |
Execution timed out |
1099 ms |
5248 KB |
Time limit exceeded |
| 13 |
Execution timed out |
1088 ms |
19960 KB |
Time limit exceeded |
| 14 |
Execution timed out |
1094 ms |
22696 KB |
Time limit exceeded |
| 15 |
Execution timed out |
1091 ms |
23800 KB |
Time limit exceeded |
| 16 |
Execution timed out |
1083 ms |
21048 KB |
Time limit exceeded |
| 17 |
Execution timed out |
1097 ms |
23672 KB |
Time limit exceeded |
| 18 |
Execution timed out |
1101 ms |
23800 KB |
Time limit exceeded |
| 19 |
Execution timed out |
1085 ms |
23800 KB |
Time limit exceeded |
| 20 |
Execution timed out |
1076 ms |
4992 KB |
Time limit exceeded |
| 21 |
Execution timed out |
1094 ms |
5248 KB |
Time limit exceeded |
| 22 |
Execution timed out |
1088 ms |
23932 KB |
Time limit exceeded |
| 23 |
Execution timed out |
1100 ms |
19960 KB |
Time limit exceeded |
| 24 |
Execution timed out |
1098 ms |
23800 KB |
Time limit exceeded |
| 25 |
Execution timed out |
1096 ms |
20600 KB |
Time limit exceeded |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
4992 KB |
Output isn't correct |
| 2 |
Incorrect |
4 ms |
5248 KB |
Output isn't correct |
| 3 |
Correct |
159 ms |
22648 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 5 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 6 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 7 |
Incorrect |
3 ms |
4992 KB |
Output isn't correct |
| 8 |
Incorrect |
3 ms |
4992 KB |
Output isn't correct |
| 9 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 14 |
Incorrect |
3 ms |
4992 KB |
Output isn't correct |
| 15 |
Incorrect |
5 ms |
5248 KB |
Output isn't correct |
| 16 |
Incorrect |
4 ms |
5248 KB |
Output isn't correct |
| 17 |
Correct |
4 ms |
5248 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 21 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 22 |
Incorrect |
4 ms |
5248 KB |
Output isn't correct |
| 23 |
Incorrect |
164 ms |
24696 KB |
Output isn't correct |
| 24 |
Incorrect |
210 ms |
28408 KB |
Output isn't correct |
| 25 |
Correct |
152 ms |
22652 KB |
Output is correct |
| 26 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 27 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 28 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 29 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 30 |
Incorrect |
204 ms |
27384 KB |
Output isn't correct |
| 31 |
Incorrect |
230 ms |
31096 KB |
Output isn't correct |
| 32 |
Incorrect |
245 ms |
25592 KB |
Output isn't correct |
| 33 |
Correct |
162 ms |
23800 KB |
Output is correct |
| 34 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 35 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 37 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 38 |
Incorrect |
194 ms |
27896 KB |
Output isn't correct |
| 39 |
Incorrect |
218 ms |
24952 KB |
Output isn't correct |
| 40 |
Incorrect |
211 ms |
28024 KB |
Output isn't correct |
| 41 |
Correct |
112 ms |
23780 KB |
Output is correct |
| 42 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 43 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 44 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 45 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 46 |
Incorrect |
188 ms |
27384 KB |
Output isn't correct |
| 47 |
Incorrect |
221 ms |
28152 KB |
Output isn't correct |
| 48 |
Incorrect |
231 ms |
30968 KB |
Output isn't correct |
| 49 |
Correct |
203 ms |
22648 KB |
Output is correct |
| 50 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 51 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 52 |
Correct |
3 ms |
5120 KB |
Output is correct |
| 53 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 54 |
Incorrect |
199 ms |
26872 KB |
Output isn't correct |
