oj.uz

Submission #1058519

# Submission time Handle Problem Language Result Execution time Memory
1058519 2024-08-14T10:30:12 Z rainboy COVID tests (CEOI24_covid) C
89.83 / 100
 1216 ms 344 KB 
#include <stdio.h>
#include <string.h>

#define N	1000

int min(int a, int b) { return a < b ? a : b; }

unsigned int Z = 12345;

int rand_() {
	return (Z *= 3) >> 1;
}

int n, m; double p;

int query(int *ii, int k) {
	static char cc[N + 1], s[2];
	int h;

	memset(cc, '0', n * sizeof *cc);
	for (h = 0; h < k; h++)
		cc[ii[h]] = '1';
	printf("Q %s\n", cc), fflush(stdout);
	scanf("%s", s);
	return s[0] == 'P';
}

void shuffle(int *ii, int n) {
	int h, h_, tmp;

	for (h = 0; h < n; h++) {
		h_ = rand_() % (h + 1);
		tmp = ii[h], ii[h] = ii[h_], ii[h_] = tmp;
	}
}

int main() {
	int t, subtask;

	scanf("%d%lf%d", &n, &p, &t), m = 1 / p, subtask = t == 1 ? 1 : 2;
	while (t--) {
		static char cc[N + 1];
		static int ii[N];
		int n_, n__, h, i, l, r, lower, upper;

		memset(cc, '0', n * sizeof *cc), cc[n] = 0;
		if (subtask == 1) {
			for (i = 0; i < n; i++) {
				ii[0] = i;
				if (query(ii, 1))
					cc[i] = '1';
			}
		} else {
			n_ = 0;
			for (i = 0; i < n; i++)
				ii[n_++] = i;
			while (n_ > 0) {
				shuffle(ii, n_);
				n__ = 0;
				for (l = 0; l < n_; l += m) {
					r = min(l + m, n_);
					if (query(ii + l, r - l)) {
						lower = l, upper = r;
						while (upper - lower > 1) {
							h = (lower + upper) / 2;
							if (query(ii + l, h - l))
								upper = h;
							else
								lower = h;
						}
						cc[ii[lower]] = '1';
						for (h = lower + 1; h < r; h++)
							ii[n__++] = ii[h];
					}
				}
				n_ = n__;
			}
		}
		printf("A %s\n", cc), fflush(stdout);
		scanf("%*s");
	}
	return 0;
}

Compilation message

Main.c: In function 'query':
Main.c:24:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |  scanf("%s", s);
      |  ^~~~~~~~~~~~~~
Main.c: In function 'main':
Main.c:40:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |  scanf("%d%lf%d", &n, &p, &t), m = 1 / p, subtask = t == 1 ? 1 : 2;
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:80:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |   scanf("%*s");
      |   ^~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 344 KB Output is correct
2 Correct 4 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 3 ms 344 KB Output is correct
7 Correct 4 ms 344 KB Output is correct
8 Correct 4 ms 344 KB Output is correct
9 Correct 5 ms 344 KB Output is correct
10 Correct 5 ms 344 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 4 ms 344 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 4 ms 344 KB Output is correct
15 Correct 3 ms 344 KB Output is correct
16 Correct 4 ms 344 KB Output is correct
17 Correct 3 ms 344 KB Output is correct

Subtask #2
79.83 / 90.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 344 KB Output is correct (P=0.001, F=15.1, Q=10.7) -> 90.00 points
2 Correct 68 ms 344 KB Output is correct (P=0.005256, F=51.1, Q=47.7) -> 90.00 points
3 Correct 121 ms 344 KB Output is correct (P=0.011546, F=94.9, Q=92.8) -> 90.00 points
4 Correct 305 ms 344 KB Output is correct (P=0.028545, F=191.5, Q=191.4) -> 90.00 points
5 Correct 419 ms 344 KB Output is correct (P=0.039856, F=246.3, Q=251.3) -> 83.24 points
6 Correct 605 ms 344 KB Output is correct (P=0.068648, F=366.2, Q=373.6) -> 83.27 points
7 Correct 838 ms 344 KB Output is correct (P=0.104571, F=490.3, Q=497.8) -> 84.81 points
8 Correct 1089 ms 344 KB Output is correct (P=0.158765, F=639.1, Q=656.5) -> 81.16 points
9 Correct 1216 ms 344 KB Output is correct (P=0.2, F=731.4, Q=754.7) -> 79.83 points