oj.uz

Submission #481413

# Submission time Handle Problem Language Result Execution time Memory
481413 2021-10-20T17:50:48 Z rainboy Klasika (COCI20_klasika) C
110 / 110
 3440 ms 123604 KB 
#include <stdio.h>
#include <stdlib.h>

#define N	200001
#define H	30
#define N_	(1 + N * H)
#define INF	0x3f3f3f3f

int max(int a, int b) { return a > b ? a : b; }

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 == 0 || o >= 2 && (o & o - 1) == 0)
		ej[i] = (int *) realloc(ej[i], (o == 0 ? 2 : o * 2) * sizeof *ej[i]);
	ej[i][o] = j;
}

int ta[N], tb[N];

void dfs(int i) {
	static int time;
	int o;

	ta[i] = time++;
	for (o = eo[i]; o--; ) {
		int j = ej[i][o];

		dfs(j);
	}
	tb[i] = time;
}

int zz[1 + N_], ll[1 + N_], rr[1 + N_], kk[1 + 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 {
		split(ll[u], k);
		ll[u] = r_, r_ = u;
	}
}

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_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 tt[N_][2], tr[N_], _ = 2;

void update(int a, int x) {
	int h, t;

	for (h = H - 1, t = 1; h >= 0; h--) {
		int c = a >> h & 1;

		if (!tt[t][c])
			tt[t][c] = _++;
		t = tt[t][c];
		tr[t] = tr_add(tr[t], x);
	}
}

int query(int a, int l, int r) {
	int h, t, x;

	x = 0;
	for (h = H - 1, t = 1; h >= 0; h--) {
		int c = (a >> h & 1) ^ 1;

		if (tt[t][c] && tr_ceil(tr[tt[t][c]], l) < r)
			x |= 1 << h;
		else
			c ^= 1;
		t = tt[t][c];
	}
	return x;
}

int main() {
	static int aa[N], ii[N], jj[N];
	int n, q, h;

	scanf("%d", &q);
	n = 1;
	for (h = 0; h < q; h++) {
		static char s[8];
		int i, j;

		scanf("%s%d", s, &i), i--;
		if (s[0] == 'A') {
			j = n++;
			scanf("%d", &aa[j]), aa[j] ^= aa[i];
			append(i, j);
			ii[h] = -1, jj[h] = j;
		} else {
			scanf("%d", &j), j--;
			ii[h] = i, jj[h] = j;
		}
	}
	dfs(0);
	update(aa[0], 0);
	for (h = 0; h < q; h++)
		if (ii[h] == -1)
			update(aa[jj[h]], ta[jj[h]]);
		else
			printf("%d\n", query(aa[ii[h]], ta[jj[h]], tb[jj[h]]));
	return 0;
}

Compilation message

klasika.c: In function 'append':
klasika.c:22:33: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   22 |  if (o == 0 || o >= 2 && (o & o - 1) == 0)
      |                               ~~^~~
klasika.c:22:23: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   22 |  if (o == 0 || o >= 2 && (o & o - 1) == 0)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
klasika.c: In function 'main':
klasika.c:131:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  131 |  scanf("%d", &q);
      |  ^~~~~~~~~~~~~~~
klasika.c:137:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  137 |   scanf("%s%d", s, &i), i--;
      |   ^~~~~~~~~~~~~~~~~~~~
klasika.c:140:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  140 |    scanf("%d", &aa[j]), aa[j] ^= aa[i];
      |    ^~~~~~~~~~~~~~~~~~~
klasika.c:144:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  144 |    scanf("%d", &j), j--;
      |    ^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 2 ms 716 KB Output is correct
14 Correct 3 ms 972 KB Output is correct
15 Correct 3 ms 1304 KB Output is correct
16 Correct 3 ms 1612 KB Output is correct
17 Correct 2 ms 588 KB Output is correct
18 Correct 4 ms 920 KB Output is correct
19 Correct 5 ms 1228 KB Output is correct
20 Correct 5 ms 1484 KB Output is correct
21 Correct 2 ms 588 KB Output is correct
22 Correct 3 ms 972 KB Output is correct
23 Correct 4 ms 1228 KB Output is correct
24 Correct 5 ms 1484 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 325 ms 33768 KB Output is correct
2 Correct 554 ms 62808 KB Output is correct
3 Correct 700 ms 91084 KB Output is correct
4 Correct 861 ms 119580 KB Output is correct
5 Correct 592 ms 31344 KB Output is correct
6 Correct 1358 ms 58016 KB Output is correct
7 Correct 2124 ms 83932 KB Output is correct
8 Correct 2956 ms 109724 KB Output is correct
9 Correct 428 ms 31616 KB Output is correct
10 Correct 878 ms 58948 KB Output is correct
11 Correct 1329 ms 85660 KB Output is correct
12 Correct 1702 ms 111852 KB Output is correct

Subtask #4
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 2 ms 716 KB Output is correct
14 Correct 3 ms 972 KB Output is correct
15 Correct 3 ms 1304 KB Output is correct
16 Correct 3 ms 1612 KB Output is correct
17 Correct 2 ms 588 KB Output is correct
18 Correct 4 ms 920 KB Output is correct
19 Correct 5 ms 1228 KB Output is correct
20 Correct 5 ms 1484 KB Output is correct
21 Correct 2 ms 588 KB Output is correct
22 Correct 3 ms 972 KB Output is correct
23 Correct 4 ms 1228 KB Output is correct
24 Correct 5 ms 1484 KB Output is correct
25 Correct 325 ms 33768 KB Output is correct
26 Correct 554 ms 62808 KB Output is correct
27 Correct 700 ms 91084 KB Output is correct
28 Correct 861 ms 119580 KB Output is correct
29 Correct 592 ms 31344 KB Output is correct
30 Correct 1358 ms 58016 KB Output is correct
31 Correct 2124 ms 83932 KB Output is correct
32 Correct 2956 ms 109724 KB Output is correct
33 Correct 428 ms 31616 KB Output is correct
34 Correct 878 ms 58948 KB Output is correct
35 Correct 1329 ms 85660 KB Output is correct
36 Correct 1702 ms 111852 KB Output is correct
37 Correct 1018 ms 34900 KB Output is correct
38 Correct 1274 ms 66404 KB Output is correct
39 Correct 1372 ms 95360 KB Output is correct
40 Correct 1258 ms 123604 KB Output is correct
41 Correct 1375 ms 34728 KB Output is correct
42 Correct 2192 ms 61428 KB Output is correct
43 Correct 2751 ms 87552 KB Output is correct
44 Correct 3440 ms 113356 KB Output is correct
45 Correct 1160 ms 34900 KB Output is correct
46 Correct 1730 ms 62380 KB Output is correct
47 Correct 2054 ms 89052 KB Output is correct
48 Correct 2183 ms 115624 KB Output is correct