| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 319027 |
2020-11-03T18:31:56 Z |
rqi |
Pipes (BOI13_pipes) |
C++14 |
|
375 ms |
36452 KB |
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef long long ll;
typedef pair<int, int> pi;
typedef vector<pi> vpi;
#define mp make_pair
#define f first
#define s second
#define pb push_back
struct DSU{
vi e;
void init(int n){
e = vi(n, -1);
}
int get(int a){
if(e[a] < 0) return a;
e[a] = get(e[a]);
return e[a];
}
bool unite(int a, int b){
a = get(a);
b = get(b);
if(a == b) return 0;
if(-e[a] < -e[b]) swap(a, b);
e[b] = a;
return 1;
}
};
const int mx = 500005;
const int mx1 = 100005;
int N, M;
ll c[mx1];
ll origc[mx1];
int u[mx];
int v[mx];
ll x[mx];
bool inTree[mx1];
vpi adj[mx1];
int depth[mx1];
void genTree(int node, int prv = -1, int d = 0){
depth[node] = d;
for(auto u: adj[node]){
if(u.f == prv) continue;
genTree(u.f, node, d+1);
ll val = c[u.f];
x[u.s]+=val;
c[u.f]-=val;
c[node]-=val;
}
}
int main(){
cin >> N >> M;
DSU dsu;
dsu.init(N+5);
for(int i = 1; i <= N; i++){
cin >> c[i];
origc[i] = c[i];
}
for(int i = 1; i <= M; i++){
cin >> u[i] >> v[i];
if(dsu.unite(u[i], v[i])){
inTree[i] = 1;
adj[u[i]].pb(mp(v[i], i));
adj[v[i]].pb(mp(u[i], i));
}
}
genTree(1);
if(M == N-1){ //Good
if(c[1] != 0){
assert(0==1);
cout << 0 << "\n";
return 0;
}
for(int i = 1; i <= M; i++){
cout << 2*x[i] << "\n";
}
return 0;
}
if(M >= N+1){
cout << 0 << "\n";
return 0;
}
for(int i = 1; i <= M; i++){
if(inTree[i]) continue;
if(depth[u[i]] % 2 != depth[v[i]] % 2){
assert(0==1);
cout << 0 << "\n";
return 0;
}
for(int j = 1; j <= M; j++){
x[j] = 0;
}
x[i] = c[1]/2;
for(int j = 1; j <= N; j++){
c[j] = origc[j];
}
c[u[i]]-=x[i];
c[v[i]]-=x[i];
genTree(1);
assert(c[1] == 0);
}
for(int i = 1; i <= M; i++){
cout << 2*x[i] << "\n";
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 3 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 4 |
Correct |
139 ms |
11108 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 8 |
Correct |
3 ms |
2668 KB |
Output is correct |
| 9 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 10 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 11 |
Correct |
4 ms |
2796 KB |
Output is correct |
| 12 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 13 |
Correct |
124 ms |
9956 KB |
Output is correct |
| 14 |
Correct |
129 ms |
11236 KB |
Output is correct |
| 15 |
Correct |
144 ms |
11748 KB |
Output is correct |
| 16 |
Correct |
124 ms |
10596 KB |
Output is correct |
| 17 |
Correct |
145 ms |
11620 KB |
Output is correct |
| 18 |
Correct |
143 ms |
11620 KB |
Output is correct |
| 19 |
Correct |
151 ms |
15972 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 21 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 22 |
Correct |
142 ms |
11616 KB |
Output is correct |
| 23 |
Correct |
110 ms |
9956 KB |
Output is correct |
| 24 |
Correct |
138 ms |
11620 KB |
Output is correct |
| 25 |
Correct |
114 ms |
10340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 2 |
Runtime error |
7 ms |
5612 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 3 |
Runtime error |
143 ms |
26212 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 4 |
Correct |
130 ms |
14308 KB |
Output is correct |
| 5 |
Correct |
127 ms |
11108 KB |
Output is correct |
| 6 |
Correct |
371 ms |
17728 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 8 |
Correct |
3 ms |
2668 KB |
Output is correct |
| 9 |
Runtime error |
7 ms |
5356 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 10 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2668 KB |
Output is correct |
| 14 |
Correct |
2 ms |
2664 KB |
Output is correct |
| 15 |
Runtime error |
7 ms |
5612 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 16 |
Runtime error |
7 ms |
5484 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 17 |
Runtime error |
9 ms |
5484 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 18 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 19 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 20 |
Correct |
3 ms |
2796 KB |
Output is correct |
| 21 |
Correct |
4 ms |
2796 KB |
Output is correct |
| 22 |
Runtime error |
7 ms |
5484 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 23 |
Correct |
129 ms |
13412 KB |
Output is correct |
| 24 |
Runtime error |
163 ms |
29240 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 25 |
Runtime error |
140 ms |
26468 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 26 |
Correct |
136 ms |
16996 KB |
Output is correct |
| 27 |
Correct |
129 ms |
17580 KB |
Output is correct |
| 28 |
Correct |
128 ms |
11620 KB |
Output is correct |
| 29 |
Correct |
324 ms |
17252 KB |
Output is correct |
| 30 |
Runtime error |
168 ms |
36196 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 31 |
Correct |
178 ms |
18404 KB |
Output is correct |
| 32 |
Correct |
154 ms |
13284 KB |
Output is correct |
| 33 |
Runtime error |
148 ms |
29284 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 34 |
Correct |
162 ms |
16356 KB |
Output is correct |
| 35 |
Correct |
130 ms |
14524 KB |
Output is correct |
| 36 |
Correct |
123 ms |
11616 KB |
Output is correct |
| 37 |
Correct |
375 ms |
18532 KB |
Output is correct |
| 38 |
Runtime error |
183 ms |
28004 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 39 |
Correct |
154 ms |
13028 KB |
Output is correct |
| 40 |
Runtime error |
157 ms |
27748 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 41 |
Runtime error |
158 ms |
36116 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 42 |
Correct |
140 ms |
18660 KB |
Output is correct |
| 43 |
Correct |
128 ms |
15968 KB |
Output is correct |
| 44 |
Correct |
126 ms |
11556 KB |
Output is correct |
| 45 |
Correct |
292 ms |
13924 KB |
Output is correct |
| 46 |
Correct |
158 ms |
17380 KB |
Output is correct |
| 47 |
Runtime error |
155 ms |
28388 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 48 |
Runtime error |
174 ms |
36452 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 49 |
Runtime error |
137 ms |
23652 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| 50 |
Correct |
133 ms |
15716 KB |
Output is correct |
| 51 |
Correct |
131 ms |
13412 KB |
Output is correct |
| 52 |
Correct |
127 ms |
12772 KB |
Output is correct |
| 53 |
Correct |
312 ms |
15460 KB |
Output is correct |
| 54 |
Correct |
175 ms |
16616 KB |
Output is correct |
