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Submission #483310

# Submission time Handle Problem Language Result Execution time Memory
483310 2021-10-28T15:45:12 Z rainboy Specijacija (COCI20_specijacija) C
110 / 110
 1824 ms 41624 KB 
#include <stdio.h>
#include <stdlib.h>

#define N	200000
#define N_	(1 << 18)	/* N_ = pow2(ceil(log2(N + 2))) */
#define K	100

int n;

int depth(long long i) {
	int lower = -1, upper = n;

	while (upper - lower > 1) {
		int d = (lower + upper) / 2;

		if (i < (long long) (d + 1) * (d + 2) / 2)
			upper = d;
		else
			lower = d;
	}
	return upper;
}

int *aaa[N_ * 2], sz[N_ * 2], n_;

void pul(int i) {
	int l = i << 1, r = l | 1, hl, hr, h;

	aaa[i] = (int *) malloc((sz[i] = sz[l] + sz[r]) * sizeof *aaa[i]);
	hl = 0, hr = 0, h = 0;
	while (hl < sz[l] && hr < sz[r])
		if (aaa[l][hl] + hr < aaa[r][hr])
			aaa[i][h++] = aaa[l][hl++] + hr;
		else
			aaa[i][h++] = aaa[r][hr++];
	while (hl < sz[l])
		aaa[i][h++] = aaa[l][hl++] + hr;
	while (hr < sz[r])
		aaa[i][h++] = aaa[r][hr++];
}

void build(int *aa, int n) {
	int i;

	n_ = 1;
	while (n_ < n + 2)
		n_ <<= 1;
	for (i = 0; i < n_; i++)
		if (i >= n)
			sz[n_ + i] = 0;
		else {
			aaa[n_ + i] = (int *) malloc((sz[n_ + i] = 1) * sizeof *aaa[n_ + i]);
			aaa[n_ + i][0] = aa[i];
		}
	for (i = n_ - 1; i > 0; i--)
		pul(i);
}

int lift(int i, int a) {
	int lower = -1, upper = sz[i];

	while (upper - lower > 1) {
		int h = (lower + upper) / 2;

		if (aaa[i][h] < a)
			lower = h;
		else
			upper = h;
	}
	return a - upper;
}

int lift1(int l, int r, int a) {
	static int qu[K];
	int cnt;

	cnt = 0;
	for (l += n_, r += n_; l <= r; l >>= 1, r >>= 1) {
		if ((l & 1) == 1)
			qu[cnt++] = l++;
		if ((r & 1) == 0)
			a = lift(r--, a);
	}
	while (cnt--)
		a = lift(qu[cnt], a);
	return a;
}

long long lift2(int r, int a, int b) {
	int l = 0;

	for (l += n_, r += n_; l <= r; l >>= 1, r >>= 1)
		if ((r & 1) == 0) {
			int i = r--, a_ = lift(i, a), b_ = lift(i, b);

			if (a_ != b_)
				a = a_, b = b_;
			else {
				while (i < n_) {
					a_ = lift(i << 1 | 1, a), b_ = lift(i << 1 | 1, b);
					if (a_ != b_)
						a = a_, b = b_, i = i << 1 | 0;
					else
						i = i << 1 | 1;
				}
				return (long long) (i - n_) * (i - n_ + 1) / 2 + lift(i, a);
			}
		}
	return -1;
}

int main() {
	static int ii[N];
	int q, t, i, j;
	long long n1, ans;

	scanf("%d%d%d", &n, &q, &t);
	for (i = 0; i < n; i++) {
		long long a;

		scanf("%lld", &a), a--, ii[i] = a - (long long) i * (i + 1) / 2;
	}
	build(ii, n);
	n1 = (long long) (n + 1) * (n + 2) / 2, ans = 0;
	while (q--) {
		long long x, y, tmp;
		int dx, dy;

		scanf("%lld%lld", &x, &y), x--, y--;
		x = (x + t * ans) % n1, y = (y + t * ans) % n1;
		if (x > y)
			tmp = x, x = y, y = tmp;
		dx = depth(x), i = x - (long long) dx * (dx + 1) / 2;
		dy = depth(y), j = y - (long long) dy * (dy + 1) / 2;
		j = lift1(dx, dy - 1, j);
		printf("%lld\n", ans = (i == j ? (long long) dx * (dx + 1) / 2 + i : lift2(dx - 1, i, j)) + 1);
	}
	return 0;
}

Compilation message

Main.c: In function 'main':
Main.c:117:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  117 |  scanf("%d%d%d", &n, &q, &t);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:121:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  121 |   scanf("%lld", &a), a--, ii[i] = a - (long long) i * (i + 1) / 2;
      |   ^~~~~~~~~~~~~~~~~
Main.c:129:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  129 |   scanf("%lld%lld", &x, &y), x--, y--;
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 32960 KB Output is correct
2 Correct 6 ms 3532 KB Output is correct
3 Correct 65 ms 33360 KB Output is correct
4 Correct 35 ms 17464 KB Output is correct
5 Correct 64 ms 33256 KB Output is correct
6 Correct 20 ms 9804 KB Output is correct
7 Correct 50 ms 33348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 32960 KB Output is correct
2 Correct 6 ms 3532 KB Output is correct
3 Correct 65 ms 33360 KB Output is correct
4 Correct 35 ms 17464 KB Output is correct
5 Correct 64 ms 33256 KB Output is correct
6 Correct 20 ms 9804 KB Output is correct
7 Correct 50 ms 33348 KB Output is correct
8 Correct 255 ms 1392 KB Output is correct
9 Correct 193 ms 1360 KB Output is correct
10 Correct 235 ms 1300 KB Output is correct
11 Correct 150 ms 1040 KB Output is correct
12 Correct 240 ms 1280 KB Output is correct
13 Correct 165 ms 1160 KB Output is correct
14 Correct 243 ms 1788 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 32960 KB Output is correct
2 Correct 6 ms 3532 KB Output is correct
3 Correct 65 ms 33360 KB Output is correct
4 Correct 35 ms 17464 KB Output is correct
5 Correct 64 ms 33256 KB Output is correct
6 Correct 20 ms 9804 KB Output is correct
7 Correct 50 ms 33348 KB Output is correct
8 Correct 255 ms 1392 KB Output is correct
9 Correct 193 ms 1360 KB Output is correct
10 Correct 235 ms 1300 KB Output is correct
11 Correct 150 ms 1040 KB Output is correct
12 Correct 240 ms 1280 KB Output is correct
13 Correct 165 ms 1160 KB Output is correct
14 Correct 243 ms 1788 KB Output is correct
15 Correct 1695 ms 38244 KB Output is correct
16 Correct 730 ms 12100 KB Output is correct
17 Correct 1680 ms 40328 KB Output is correct
18 Correct 755 ms 12116 KB Output is correct
19 Correct 1633 ms 40064 KB Output is correct
20 Correct 706 ms 11696 KB Output is correct
21 Correct 1814 ms 41624 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1639 ms 33388 KB Output is correct
2 Correct 1089 ms 21944 KB Output is correct
3 Correct 1657 ms 40360 KB Output is correct
4 Correct 1037 ms 21668 KB Output is correct
5 Correct 1652 ms 40012 KB Output is correct
6 Correct 1072 ms 22588 KB Output is correct
7 Correct 1824 ms 41520 KB Output is correct