| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 110782 |
2019-05-12T08:16:59 Z |
ckodser |
Pipes (BOI13_pipes) |
C++14 |
|
185 ms |
14576 KB |
#include<bits/stdc++.h>
#define pb push_back
using namespace std;
typedef long long ll;
const int N = 100005;
int n, m, cv, cu, A[N], B[N], M[N], P[N], R[N];
ll C[N], D[N];
vector < int > Adj[N];
void DFSC(int v, int p)
{
M[v] = 1;
for (int id : Adj[v])
if (id != p)
{
int u = A[id] ^ B[id] ^ v;
if (M[u])
cv = v, cu = u;
if (!M[u])
P[u] = v, DFSC(u, id);
}
}
void DFS(int v, int p)
{
for (int id : Adj[v])
if (id != p)
DFS(A[id] ^ B[id] ^ v, id);
int par = A[p] ^ B[p] ^ v;
D[p] += C[v] + C[v];
C[par] -= C[v];
C[v] = 0;
}
void DFS2(int v, int p)
{
M[v] = 2;
P[v] = p;
R[v] = Adj[v][0] ^ Adj[v][1] ^ p;
int u = A[R[v]] ^ B[R[v]] ^ v;
if (M[u] != 2)
DFS2(u, R[v]);
}
int main()
{
scanf("%d%d", &n, &m);
if (m > n) return !printf("0\n");
for (int i = 1; i <= n; i++)
scanf("%lld", &C[i]);
for (int i = 1; i <= m; i++)
{
scanf("%d%d", &A[i], &B[i]);
Adj[A[i]].pb(i);
Adj[B[i]].pb(i);
}
DFSC(1, 0);
if (!cv)
cv = cu = 1;
vector < int > vec;
vec.pb(cu);
while (cv != cu)
cu = P[cu], vec.pb(cu);
if ((int)vec.size() % 2 == 0)
return !printf("0\n");
memset(M, 0, sizeof(M));
for (int v : vec)
M[v] = 1;
for (int v : vec)
for (int id : Adj[v])
{
int u = A[id] ^ B[id] ^ v;
if (!M[u]) DFS(u, id);
}
if (vec.size() > 1)
{
for (int v : vec)
{
for (int i = 0; i < (int)Adj[v].size(); i++)
{
int id = Adj[v][i];
if (!M[A[id] ^ B[id] ^ v])
swap(Adj[v][i], Adj[v].back()), Adj[v].pop_back(), i --;
}
assert(Adj[v].size() == 2);
}
int idd = Adj[vec[0]][0];
if ((A[idd] ^ B[idd] ^ vec[0]) != vec[1])
DFS2(vec[0], Adj[vec[0]][0]);
else
DFS2(vec[0], Adj[vec[0]][1]);
vector < ll > Df(vec.size(), 0);
for (int i = 2; i != 0; i = (i + 2) % (int)vec.size())
{
int p1 = i - 1;
int p2 = i - 2;
if (p1 < 0)
p1 += (int)vec.size();
if (p2 < 0)
p2 += (int)vec.size();
Df[i] = Df[p2] - C[vec[p2]] + C[vec[p1]];
}
ll sum = 0;
for (int i = 0; i < (int)vec.size(); i++)
sum += C[vec[i]];
sum /= 2;
for (int i = 0; i < (int)vec.size(); i++)
sum -= Df[i];
sum /= (int)vec.size();
for (int i = 0; i < (int)vec.size(); i++)
D[P[vec[i]]] += (sum + Df[i]) * 2;
}
for (int i = 1; i <= m; i++)
printf("%lld\n", D[i]);
return 0;
}
Compilation message
pipes.cpp: In function 'int main()':
pipes.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &n, &m);
~~~~~^~~~~~~~~~~~~~~~
pipes.cpp:46:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld", &C[i]);
~~~~~^~~~~~~~~~~~~~~
pipes.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &A[i], &B[i]);
~~~~~^~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
3072 KB |
Output is correct |
| 2 |
Correct |
4 ms |
3072 KB |
Output is correct |
| 3 |
Correct |
6 ms |
3072 KB |
Output is correct |
| 4 |
Correct |
119 ms |
9436 KB |
Output is correct |
| 5 |
Correct |
5 ms |
3072 KB |
Output is correct |
| 6 |
Correct |
5 ms |
3072 KB |
Output is correct |
| 7 |
Correct |
7 ms |
3072 KB |
Output is correct |
| 8 |
Correct |
5 ms |
3072 KB |
Output is correct |
| 9 |
Correct |
6 ms |
3200 KB |
Output is correct |
| 10 |
Correct |
6 ms |
3200 KB |
Output is correct |
| 11 |
Correct |
7 ms |
3200 KB |
Output is correct |
| 12 |
Correct |
7 ms |
3200 KB |
Output is correct |
| 13 |
Correct |
108 ms |
8192 KB |
Output is correct |
| 14 |
Correct |
108 ms |
9080 KB |
Output is correct |
| 15 |
Correct |
157 ms |
9464 KB |
Output is correct |
| 16 |
Correct |
116 ms |
8568 KB |
Output is correct |
| 17 |
Correct |
128 ms |
9604 KB |
Output is correct |
| 18 |
Correct |
120 ms |
9460 KB |
Output is correct |
| 19 |
Correct |
165 ms |
11716 KB |
Output is correct |
| 20 |
Correct |
5 ms |
3072 KB |
Output is correct |
| 21 |
Correct |
5 ms |
3200 KB |
Output is correct |
| 22 |
Correct |
132 ms |
9608 KB |
Output is correct |
| 23 |
Correct |
89 ms |
8184 KB |
Output is correct |
| 24 |
Correct |
120 ms |
9464 KB |
Output is correct |
| 25 |
Correct |
138 ms |
8364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
3072 KB |
Output is correct |
| 2 |
Correct |
6 ms |
3200 KB |
Output is correct |
| 3 |
Correct |
92 ms |
10360 KB |
Output is correct |
| 4 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 5 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 6 |
Correct |
4 ms |
2684 KB |
Output is correct |
| 7 |
Correct |
4 ms |
3200 KB |
Output is correct |
| 8 |
Correct |
4 ms |
3072 KB |
Output is correct |
| 9 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 10 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 11 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 12 |
Correct |
4 ms |
2716 KB |
Output is correct |
| 13 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 14 |
Correct |
5 ms |
3072 KB |
Output is correct |
| 15 |
Correct |
5 ms |
3200 KB |
Output is correct |
| 16 |
Correct |
5 ms |
3200 KB |
Output is correct |
| 17 |
Correct |
6 ms |
2816 KB |
Output is correct |
| 18 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 19 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 20 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 21 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 22 |
Correct |
5 ms |
3200 KB |
Output is correct |
| 23 |
Correct |
104 ms |
11384 KB |
Output is correct |
| 24 |
Correct |
124 ms |
12632 KB |
Output is correct |
| 25 |
Correct |
84 ms |
10360 KB |
Output is correct |
| 26 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 27 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 28 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 29 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 30 |
Correct |
170 ms |
14152 KB |
Output is correct |
| 31 |
Correct |
166 ms |
14576 KB |
Output is correct |
| 32 |
Correct |
145 ms |
10796 KB |
Output is correct |
| 33 |
Correct |
98 ms |
11116 KB |
Output is correct |
| 34 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 35 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 36 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 37 |
Correct |
5 ms |
2604 KB |
Output is correct |
| 38 |
Correct |
156 ms |
13580 KB |
Output is correct |
| 39 |
Correct |
125 ms |
10636 KB |
Output is correct |
| 40 |
Correct |
141 ms |
12536 KB |
Output is correct |
| 41 |
Correct |
94 ms |
12920 KB |
Output is correct |
| 42 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 43 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 44 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 45 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 46 |
Correct |
166 ms |
14520 KB |
Output is correct |
| 47 |
Correct |
161 ms |
12404 KB |
Output is correct |
| 48 |
Correct |
185 ms |
14436 KB |
Output is correct |
| 49 |
Correct |
104 ms |
8824 KB |
Output is correct |
| 50 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 51 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 52 |
Correct |
5 ms |
2688 KB |
Output is correct |
| 53 |
Correct |
4 ms |
2688 KB |
Output is correct |
| 54 |
Correct |
149 ms |
13160 KB |
Output is correct |
