#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define ok puts("ok");
#define pii pair < int, int >
#define fr first
#define sc second
#define mk make_pair
const int N = (int)2e5 + 7;
const int inf = (int)1e9 + 7;
struct T {
pii mn, mx;
pii addmx, addmn;
T() {
mn = mk(-1, 0);
mx = mk(inf, 0);
addmn = mk(-1, 0);
addmx = mk(inf, 0);
}
};
T tree[N * 4];
struct query {
int tp, a, b, val;
query() {}
query(int _tp, int _a, int _b, int _val) {
tp = _tp;
a = _a;
b = _b;
val = _val;
}
};
query asq[N];
void push(int v, int l, int r) {
if (tree[v].addmn.fr != -1) {
if (l != r) {
tree[v + v].addmn = max(tree[v + v].addmn, tree[v].addmn);
tree[v + v + 1].addmn = max(tree[v + v + 1].addmn, tree[v].addmn);
}
tree[v].mn = max(tree[v].mn, tree[v].addmn);
tree[v].addmn.fr = -1;
}
if (tree[v].addmx.fr != inf) {
if (l != r) {
tree[v + v].addmx = min(tree[v + v].addmx, tree[v].addmx);
tree[v + v + 1].addmx = min(tree[v + v + 1].addmx, tree[v].addmx);
}
tree[v].mx = min(tree[v].mx, tree[v].addmx);
tree[v].addmx.fr = inf;
}
}
int n;
int asd;
// tp = 1, min
// tp = 2, MAX
void upd(int tp, int l, int r, int val, int v = 1, int tl = 1, int tr = n) {
push(v, tl, tr);
if (tl > r || tr < l) return ;
if (l <= tl && tr <= r) {
if (tp == 1) {
tree[v].addmn = max(tree[v].addmn, mk(val, asd));
} else if (tp == 2) {
tree[v].addmx = min(tree[v].addmx, mk(val, asd));
}
push(v, tl, tr);
return ;
}
int mid = (tl + tr) >> 1;
upd(tp, l, r, val, v + v, tl, mid);
upd(tp, l, r, val, v + v + 1, mid + 1, tr);
}
pii ar1[N], ar2[N];
int poss[N];
void buildget(int v = 1, int l = 1, int r = n) {
push(v, l, r);
if (l == r) {
ar1[poss[l]] = tree[v].mx;
ar2[poss[l]] = tree[v].mn;
return ;
}
int mid = (l + r) >> 1;
buildget(v + v, l, mid);
buildget(v + v + 1, mid + 1, r);
}
vector < int > gr[N], gr1[N + N];
int pr[N];
int sz[N];
int chainpos[N], chain[N], chainsz[N], head[N];
int chsz = 1;
int lca[18][N];
int tin[N], tout[N];
int tiktak = 0, cur = 1;
int mt[N];
int used[N];
int prr[N + N];
void getsz(int v) {
sz[v] = 1;
tin[v] = ++tiktak;
lca[0][v] = pr[v];
for (int i = 1; i <= 17; i++) {
lca[i][v] = lca[i - 1][lca[i - 1][v]];
}
for (int to : gr[v]) {
if (to == pr[v]) continue;
pr[to] = v;
getsz(to);
sz[v] += sz[to];
}
tout[v] = tiktak;
}
void build(int v, int ch) {
poss[cur] = v;
chainpos[v] = cur++;
chainsz[ch]++;
chain[v] = ch;
if (chainsz[ch] == 1) {
head[ch] = v;
}
int big = 0;
for (int to : gr[v]) {
if (to == pr[v]) continue;
if (sz[to] > sz[big]) {
big = to;
}
}
if (big)
build(big, ch);
for (int to : gr[v]) {
if (to == pr[v] || to == big) continue;
build(to, ++chsz);
}
}
bool upper(int a, int b) {
return tin[a] <= tin[b] && tout[a] >= tout[b];
}
int getlca(int a, int b) {
if (upper(a, b)) return a;
if (upper(b, a)) return b;
for (int i = 17; i >= 0; i--) {
if (!upper(lca[i][a], b)) a = lca[i][a];
}
return lca[0][a];
}
void updm(int tp, int a, int b, int val) {
int lc = getlca(a, b);
while (chain[a] != chain[lc]) {
upd(tp, chainpos[head[chain[a]]], chainpos[a], val);
a = pr[head[chain[a]]];
}
while (chain[b] != chain[lc]) {
upd(tp, chainpos[head[chain[b]]], chainpos[b], val);
b = pr[head[chain[b]]];
}
if (chainpos[lc] + 1 <= max(chainpos[b], chainpos[a])) {
upd(tp, chainpos[lc] + 1, max(chainpos[a], chainpos[b]), val);
}
}
bool kuhn(int v) {
if (used[v]) return 0;
used[v] = 1;
for (int to : gr1[v]) {
if (mt[to] == -1 || kuhn(mt[to])) {
mt[to] = v;
prr[v] = to;
return 1;
}
}
return 0;
}
main() {
memset(mt, -1, sizeof mt);
memset(prr, -1, sizeof prr);
scanf("%d", &n);
for (int i = 1; i < n; i++) {
int v, u;
scanf("%d %d", &v, &u);
gr[v].pb(u);
gr[u].pb(v);
}
pr[1] = 1;
getsz(1);
build(1, 1);
int q;
scanf("%d", &q);
for (int i = 1; i <= q; i++) {
asd = i;
char c;
scanf("\n");
int a, b, x;
scanf("%c %d %d %d", &c, &a, &b, &x);
if (c == 'M') {
asq[i] = query(2, a, b, x);
updm(2, a, b, x);
} else {
asq[i] = query(1, a, b, x);
updm(1, a, b, x);
}
}
buildget();
for (int i = 2; i <= n; i++) {
// cout << ar1[i].sc << ' ' << ar2[i].sc << endl;
if (ar1[i].sc > 0 && ar1[i].sc <= q) {
gr1[n + ar1[i].sc].pb(i);
// cout << i << ' ' << ar1[i].sc << endl;
}
if (ar2[i].sc > 0 && ar2[i].sc <= q) {
gr1[n + ar2[i].sc].pb(i);
// cout << i << ' ' << ar2[i].sc << endl;
}
}
int run = 1;
while(run) {
run = 0;
for (int i = n + 1; i <= n + q; i++) {
if (prr[i] == -1 && kuhn(i)) {
run = 1;
}
}
memset(used, 0, sizeof used);
}
// for (int i = 2; i <= n; i++) {
// cout << i << ' ' << mt[i] - n << endl;
// }
// for (int i = 2; i <= n; i++) {
// assert(prr[i] - n >= 1 && prr[i] - n <= q);
// }
for (int i = 2; i <= n; i++) {
int val;
if (mt[i] == -1) {
val = 1;
} else {
val = asq[mt[i] - n].val;
}
printf("%d %d %d\n", i, pr[i], val);
}
}
/*
5
1 2
1 3
3 4
3 5
4
m 2 4 1
M 4 5 2
M 2 3 5
m 2 3 4
*/
Compilation message
minmaxtree.cpp:188:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
main() {
^
minmaxtree.cpp: In function 'int main()':
minmaxtree.cpp:191:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
~~~~~^~~~~~~~~~
minmaxtree.cpp:194:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &v, &u);
~~~~~^~~~~~~~~~~~~~~~~
minmaxtree.cpp:202:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &q);
~~~~~^~~~~~~~~~
minmaxtree.cpp:206:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("\n");
~~~~~^~~~~~
minmaxtree.cpp:208:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%c %d %d %d", &c, &a, &b, &x);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
45 ms |
42744 KB |
Output is correct |
| 2 |
Correct |
44 ms |
42852 KB |
Output is correct |
| 3 |
Correct |
47 ms |
42884 KB |
Output is correct |
| 4 |
Correct |
47 ms |
42964 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
493 ms |
59764 KB |
Output is correct |
| 2 |
Correct |
675 ms |
59764 KB |
Output is correct |
| 3 |
Correct |
552 ms |
59764 KB |
Output is correct |
| 4 |
Correct |
465 ms |
60272 KB |
Output is correct |
| 5 |
Correct |
735 ms |
60272 KB |
Output is correct |
| 6 |
Correct |
467 ms |
60272 KB |
Output is correct |
| 7 |
Correct |
375 ms |
60272 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
373 ms |
60272 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
45 ms |
42744 KB |
Output is correct |
| 2 |
Correct |
44 ms |
42852 KB |
Output is correct |
| 3 |
Correct |
47 ms |
42884 KB |
Output is correct |
| 4 |
Correct |
47 ms |
42964 KB |
Output is correct |
| 5 |
Correct |
493 ms |
59764 KB |
Output is correct |
| 6 |
Correct |
675 ms |
59764 KB |
Output is correct |
| 7 |
Correct |
552 ms |
59764 KB |
Output is correct |
| 8 |
Correct |
465 ms |
60272 KB |
Output is correct |
| 9 |
Correct |
735 ms |
60272 KB |
Output is correct |
| 10 |
Correct |
467 ms |
60272 KB |
Output is correct |
| 11 |
Correct |
375 ms |
60272 KB |
Output is correct |
| 12 |
Incorrect |
373 ms |
60272 KB |
Output isn't correct |
| 13 |
Halted |
0 ms |
0 KB |
- |
