#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define ff first
#define ss second
#define Maxn 70009
#define ll long long
#define pb push_back
#define Inf 1000000009
#define ppb() pop_back()
#define pii pair <int , int>
#define mid(x, y) (x + y) / 2
#define all(x) x.begin(),x.end()
#define llInf 1000000000000000009
#define tr(i, c) for(__typeof(c).begin() i = (c).begin() ; i != (c).end() ; i++)
using namespace std;
using namespace __gnu_pbds;
typedef tree <int, null_type, less <int>, rb_tree_tag, tree_order_statistics_node_update> order;
bool vis[Maxn];
bool vis1[Maxn];
int n, q;
int B[Maxn];
int cnt[Maxn];
int lvl[Maxn];
int E[Maxn][2];
int P[Maxn][2];
int mat[Maxn][20];
vector <int> T;
vector <int> S[Maxn];
vector <int> L[Maxn];
vector <int> adj[Maxn];
vector <pair <int, pair <int, pii> > > A[2];
map <int, int> mp;
map <pii, int> mp1;
void dfs (int nd, int p, bool d) {
mat[nd][0] = p;
lvl[nd] = lvl[p] + 1;
for (auto i: adj[nd])
if (i != p) {
if (d == 1) {
cnt[E[i][0]] ++;
if (E[i][1] != -1 and E[i][0] != -1)
T.pb (E[i][0]), L[E[i][0]].pb (E[i][1]);
else if (E[i][0] == -1) {
vis1[E[i][1]] = 1;
mp1[{E[i][0], E[i][1]}] = 1;
}
}
dfs (i, nd, d);
}
}
void dfs1 (int nd, int p) {
for (auto i: adj[nd]) {
if (i != p) {
if (mp1[{E[i][0], E[i][1]}]) {
printf ("%d %d %d\n", nd, i, B[E[i][1]]);
if (E[i][0] != -1)
mp1[{E[i][0], E[i][1]}] = 0;
}
else
printf ("%d %d %d\n", nd, i, B[E[i][0]]);
dfs1 (i, nd);
}
}
}
void build () {
for (int i = 1; i <= 18; i++)
for (int j = 1; j <= n; j++)
if (mat[j][i - 1] != -1)
mat[j][i] = mat[mat[j][i - 1]][i - 1];
}
int LCA (int a, int b) {
if (lvl[a] < lvl[b])
swap (a, b);
for (int i = 18; i >= 0; i--)
if (lvl[mat[a][i]] >= lvl[b])
a = mat[a][i];
if (a == b)
return a;
for (int i = 18; i >= 0; i--)
if (mat[a][i] != -1 and mat[a][i] != mat[b][i])
a = mat[a][i], b = mat[b][i];
return mat[a][0];
}
int dsu (int x, bool d) {
if (P[x][d] == x)
return x;
return P[x][d] = dsu (P[x][d], d);
}
void solve (int x, int y, int z, bool d) {
x = dsu (P[x][d], d);
if (lvl[x] <= lvl[y])
return;
E[x][d] = z;
if (mat[x][0] != -1)
P[x][d] = dsu (mat[x][0], d);
x = P[x][d];
solve (x, y, z, d);
}
void solve1 (int ind) {
int sm = 0;
for (auto i: L[T[ind]])
sm += !vis1[i];
if (sm < cnt[T[ind]]) {
vis[ind] = 1;
for (auto i: L[T[ind]])
if (!vis1[i])
vis1[i] = 1, mp1[{T[ind], i}] = 1;
for (auto i: L[T[ind]]) {
while (S[i].size() > 0) {
int x = S[i].back();
S[i].ppb();
if (!vis[x])
solve1 (x);
}
}
}
else
for (auto i: L[T[ind]])
if (!vis1[i])
S[i].pb (ind);
}
int main () {
//freopen ("file.in", "r", stdin);
//freopen ("file.out", "w", stdout);
//srand ((unsigned) time ( NULL ));
//int randomNumber = rand() % 10 + 1;
scanf ("%d", &n);
for (int i = 1; i < n; i++) {
int u, v;
scanf ("%d%d", &u, &v);
adj[u].pb (v);
adj[v].pb (u);
P[i][0] = P[i][1] = i;
}
P[n][0] = P[n][1] = n;
memset (mat, -1, sizeof (mat));
dfs (1, -1, 0);
build ();
scanf ("%d", &q);
for (int i = 1; i <= q; i++) {
char c;
int x, y, z;
scanf (" %c%d%d%d", &c, &x, &y, &z);
mp[z] = 1;
int l = LCA (x, y);
if (c == 'M')
A[0].pb ({z, {l, {x, y}}});
else
A[1].pb ({z, {l, {x, y}}});
}
memset (E, -1, sizeof (E));
int c = 1;
for (auto i: mp)
B[c] = i.ff, mp[i.ff] = c++;
sort (all (A[0]));
sort (all (A[1]));
reverse (all (A[1]));
for (auto i: A[0]) {
solve (i.ss.ss.ff, i.ss.ff, mp[i.ff], 0);
solve (i.ss.ss.ss, i.ss.ff, mp[i.ff], 0);
}
for (auto i: A[1]) {
solve (i.ss.ss.ff, i.ss.ff, mp[i.ff], 1);
solve (i.ss.ss.ss, i.ss.ff, mp[i.ff], 1);
}
dfs (1, -1, 1);
T.erase (unique (all (T)), T.end());
for (int i = 0; i < T.size(); i++)
if (!vis[i])
solve1 (i);
dfs1 (1, -1);
return 0;
}
Compilation message
minmaxtree.cpp: In function 'int main()':
minmaxtree.cpp:215:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < T.size(); i++)
~~^~~~~~~~~~
minmaxtree.cpp:159:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf ("%d", &n);
~~~~~~^~~~~~~~~~
minmaxtree.cpp:162:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf ("%d%d", &u, &v);
~~~~~~^~~~~~~~~~~~~~~~
minmaxtree.cpp:175:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf ("%d", &q);
~~~~~~^~~~~~~~~~
minmaxtree.cpp:181:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf (" %c%d%d%d", &c, &x, &y, &z);
~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
14 ms |
11256 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
494 ms |
30160 KB |
Output is correct |
| 2 |
Correct |
353 ms |
30160 KB |
Output is correct |
| 3 |
Correct |
368 ms |
30160 KB |
Output is correct |
| 4 |
Correct |
403 ms |
31572 KB |
Output is correct |
| 5 |
Correct |
377 ms |
31572 KB |
Output is correct |
| 6 |
Correct |
461 ms |
31572 KB |
Output is correct |
| 7 |
Correct |
348 ms |
31572 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
190 ms |
31572 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
14 ms |
11256 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
