oj.uz

Submission #1058725

# Submission time Handle Problem Language Result Execution time Memory
1058725 2024-08-14T12:56:20 Z rainboy COVID tests (CEOI24_covid) C
50.38 / 100
 1243 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 l, int r) {
	static char cc[N + 1], s[2];

	memset(cc, '0', n * sizeof *cc), memset(cc + l, '1', (r - l) * sizeof *cc);
	printf("Q %s\n", cc), fflush(stdout);
	scanf("%s", s);
	return s[0] == 'P';
}

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];
		int i, l, r, lower, upper;

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

Compilation message

Main.c: In function 'query':
Main.c:21:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |  scanf("%s", s);
      |  ^~~~~~~~~~~~~~
Main.c: In function 'main':
Main.c:28:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |  scanf("%d%lf%d", &n, &p, &t), m = 1 / p, subtask = t == 1 ? 1 : 2;
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:57:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |   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 5 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 5 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 4 ms 344 KB Output is correct
11 Correct 3 ms 344 KB Output is correct
12 Correct 4 ms 344 KB Output is correct
13 Correct 4 ms 344 KB Output is correct
14 Correct 4 ms 344 KB Output is correct
15 Correct 4 ms 344 KB Output is correct
16 Correct 5 ms 344 KB Output is correct
17 Correct 4 ms 344 KB Output is correct

Subtask #2
40.380000003 / 90.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 344 KB Output is correct (P=0.001, F=15.1, Q=18.1) -> 50.15 points
2 Correct 94 ms 344 KB Output is correct (P=0.005256, F=51.1, Q=66.8) -> 40.38 points
3 Correct 187 ms 344 KB Output is correct (P=0.011546, F=94.9, Q=123.9) -> 40.50 points
4 Correct 357 ms 344 KB Output is correct (P=0.028545, F=191.5, Q=246.0) -> 42.09 points
5 Correct 502 ms 344 KB Output is correct (P=0.039856, F=246.3, Q=304.4) -> 46.31 points
6 Correct 681 ms 344 KB Output is correct (P=0.068648, F=366.2, Q=430.1) -> 53.00 points
7 Correct 919 ms 344 KB Output is correct (P=0.104571, F=490.3, Q=592.2) -> 49.14 points
8 Correct 1116 ms 344 KB Output is correct (P=0.158765, F=639.1, Q=697.9) -> 65.79 points
9 Correct 1243 ms 344 KB Output is correct (P=0.2, F=731.4, Q=804.0) -> 64.42 points