#include <stdio.h>
#include <stdlib.h>
#define N 200000
#define M 200000
#define Q 200000
#define N_ (M * 2 + Q * 3 + 1)
#define INF 0x3f3f3f3f
unsigned int X = 12345;
int rand_() {
return (X *= 3) >> 1;
}
int *ej[N], eo[N];
void append(int i, int j) {
int o = eo[i]++;
if (o >= 2 && (o & o - 1) == 0)
ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
ej[i][o] = j;
}
int dd[N], pp[N], qq[N], qu[N], cnt;
int dfs1(int p, int i, int d) {
int o, s, k_, j_;
pp[i] = p, dd[i] = d;
s = 1, k_ = 0, j_ = -1;
for (o = eo[i]; o--; ) {
int j = ej[i][o];
if (j != p) {
int k = dfs1(i, j, d + 1);
s += k;
if (k_ < k)
k_ = k, j_ = j;
}
}
qq[i] = j_;
return s;
}
void dfs2(int p, int i, int q) {
int o, j_;
j_ = qq[i], qq[i] = q;
if (j_ != -1)
dfs2(i, j_, q);
for (o = eo[i]; o--; ) {
int j = ej[i][o];
if (j != p && j != j_)
dfs2(i, j, j);
}
}
int lca(int i, int j) {
while (qq[i] != qq[j])
if (dd[qq[i]] > dd[qq[j]])
i = pp[qq[i]];
else
j = pp[qq[j]];
return dd[i] < dd[j] ? i : j;
}
int zz[N_], ll[N_], rr[N_], kk[N_], u_, l_, r_;
int node(int k) {
static int _ = 1;
zz[_] = rand_();
kk[_] = k;
return _++;
}
void split(int u, int k) {
if (u == 0) {
u_ = l_ = r_ = 0;
return;
}
if (kk[u] < k) {
split(rr[u], k);
rr[u] = l_, l_ = u;
} else if (kk[u] > k) {
split(ll[u], k);
ll[u] = r_, r_ = u;
} else {
u_ = u, l_ = ll[u], r_ = rr[u];
ll[u] = rr[u] = 0;
}
}
int merge(int u, int v) {
if (u == 0)
return v;
if (v == 0)
return u;
if (zz[u] < zz[v]) {
rr[u] = merge(rr[u], v);
return u;
} else {
ll[v] = merge(u, ll[v]);
return v;
}
}
int tr_add(int u, int k) {
split(u, k);
return merge(merge(l_, node(k)), r_);
}
int tr_remove(int u, int k) {
split(u, k);
return merge(l_, r_);
}
int tr_ceil(int u, int k) {
int k_ = INF;
while (u)
if (kk[u] >= k)
k_ = kk[u], u = ll[u];
else
u = rr[u];
return k_;
}
int main() {
static int ii[M], tt[N];
int n, m, q, h, i, j, l, r;
scanf("%d%d%d", &n, &m, &q);
for (i = 0; i < n; i++)
ej[i] = (int *) malloc(2 * sizeof *ej[i]);
for (h = 0; h < n - 1; h++) {
scanf("%d%d", &i, &j), i--, j--;
append(i, j), append(j, i);
}
dfs1(-1, 0, 0);
dfs2(-1, 0, 0);
for (h = 0; h < m; h++)
scanf("%d", &ii[h]), ii[h]--;
for (h = 0; h < m; h++) {
i = ii[h];
tt[i] = merge(tt[i], node(h * 2));
if (h + 1 < m) {
i = lca(ii[h], ii[h + 1]);
tt[i] = merge(tt[i], node(h * 2 + 1));
}
}
while (q--) {
int t;
scanf("%d", &t);
if (t == 1) {
scanf("%d%d", &h, &j), h--, j--;
i = ii[h];
tt[i] = tr_remove(tt[i], h * 2);
if (h > 0) {
i = lca(ii[h - 1], ii[h]);
tt[i] = tr_remove(tt[i], h * 2 - 1);
}
if (h + 1 < m) {
i = lca(ii[h], ii[h + 1]);
tt[i] = tr_remove(tt[i], h * 2 + 1);
}
ii[h] = j;
i = ii[h];
tt[i] = tr_add(tt[i], h * 2);
if (h > 0) {
i = lca(ii[h - 1], ii[h]);
tt[i] = tr_add(tt[i], h * 2 - 1);
}
if (h + 1 < m) {
i = lca(ii[h], ii[h + 1]);
tt[i] = tr_add(tt[i], h * 2 + 1);
}
} else {
scanf("%d%d%d", &l, &r, &i), l--, r--, i--;
if ((h = tr_ceil(tt[i], l * 2)) <= r * 2)
printf("%d %d\n", h / 2 + 1, (h + 1) / 2 + 1);
else
printf("-1\n");
}
}
return 0;
}
Compilation message
treearray.c: In function 'append':
treearray.c:21:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
21 | if (o >= 2 && (o & o - 1) == 0)
| ~~^~~
treearray.c: In function 'main':
treearray.c:137:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
137 | scanf("%d%d%d", &n, &m, &q);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
treearray.c:141:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
141 | scanf("%d%d", &i, &j), i--, j--;
| ^~~~~~~~~~~~~~~~~~~~~
treearray.c:147:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
147 | scanf("%d", &ii[h]), ii[h]--;
| ^~~~~~~~~~~~~~~~~~~
treearray.c:159:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
159 | scanf("%d", &t);
| ^~~~~~~~~~~~~~~
treearray.c:161:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
161 | scanf("%d%d", &h, &j), h--, j--;
| ^~~~~~~~~~~~~~~~~~~~~
treearray.c:184:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
184 | scanf("%d%d%d", &l, &r, &i), l--, r--, i--;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
340 KB |
Unexpected end of file - int32 expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
340 KB |
Unexpected end of file - int32 expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
340 KB |
Unexpected end of file - int32 expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
340 KB |
Unexpected end of file - int32 expected |
| 2 |
Halted |
0 ms |
0 KB |
- |
