oj.uz

Submission #747064

# Submission time Handle Problem Language Result Execution time Memory
747064 2023-05-23T14:49:36 Z model_code Mađioničar (COI22_madionicar) C++17
100 / 100
 2012 ms 256 KB 
#include <bits/stdc++.h>

using namespace std;

int N;

int ask(int l, int r) {
  printf("? %d %d\n", l + 1, r + 1);
  fflush(stdout);
  int ret;
  scanf("%d", &ret);
  return ret;
}

void ans(int L) {
  printf("! %d\n", L);
  fflush(stdout);
}

int main(void) {
  scanf("%d", &N);

  int r_odd = 0, r_even = 0;
  for (int i = 0; i < N; ++i) {
    while (i - r_odd - 1 >= 0 && i + r_odd + 1 < N && ask(i - r_odd - 1, i + r_odd + 1)) ++r_odd;
    while (i - r_even >= 0 && i + r_even + 1 < N && ask(i - r_even, i + r_even + 1)) ++r_even;
  }

  ans(max(2 * r_odd + 1, 2 * r_even));
  return 0;
}

Compilation message

Main.cpp: In function 'int ask(int, int)':
Main.cpp:11:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |   scanf("%d", &ret);
      |   ~~~~~^~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |   scanf("%d", &N);
      |   ~~~~~^~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 208 KB Output is correct
2 Correct 120 ms 208 KB Output is correct
3 Correct 118 ms 208 KB Output is correct
4 Correct 73 ms 208 KB Output is correct
5 Correct 86 ms 208 KB Output is correct
6 Correct 57 ms 208 KB Output is correct
7 Correct 127 ms 208 KB Output is correct
8 Correct 124 ms 208 KB Output is correct
9 Correct 139 ms 208 KB Output is correct
10 Correct 135 ms 208 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 208 KB Output is correct
2 Correct 120 ms 208 KB Output is correct
3 Correct 118 ms 208 KB Output is correct
4 Correct 73 ms 208 KB Output is correct
5 Correct 86 ms 208 KB Output is correct
6 Correct 57 ms 208 KB Output is correct
7 Correct 127 ms 208 KB Output is correct
8 Correct 124 ms 208 KB Output is correct
9 Correct 139 ms 208 KB Output is correct
10 Correct 135 ms 208 KB Output is correct
11 Correct 1195 ms 208 KB Output is correct
12 Correct 1211 ms 208 KB Output is correct
13 Correct 1185 ms 256 KB Output is correct
14 Correct 619 ms 208 KB Output is correct
15 Correct 872 ms 208 KB Output is correct
16 Correct 1028 ms 208 KB Output is correct
17 Correct 1022 ms 208 KB Output is correct
18 Correct 1313 ms 208 KB Output is correct
19 Correct 1188 ms 208 KB Output is correct
20 Correct 1156 ms 208 KB Output is correct
21 Correct 1336 ms 208 KB Output is correct
22 Correct 1419 ms 208 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1797 ms 208 KB Output is correct
2 Correct 1227 ms 208 KB Output is correct
3 Correct 1588 ms 208 KB Output is correct
4 Correct 1855 ms 208 KB Output is correct
5 Correct 1959 ms 208 KB Output is correct
6 Correct 1479 ms 208 KB Output is correct
7 Correct 1953 ms 208 KB Output is correct
8 Correct 1974 ms 208 KB Output is correct
9 Correct 1737 ms 208 KB Output is correct
10 Correct 1973 ms 208 KB Output is correct
11 Correct 2012 ms 208 KB Output is correct
12 Correct 1503 ms 208 KB Output is correct
13 Correct 1820 ms 208 KB Output is correct
14 Correct 1689 ms 208 KB Output is correct

Subtask #4
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 208 KB Output is correct
2 Correct 120 ms 208 KB Output is correct
3 Correct 118 ms 208 KB Output is correct
4 Correct 73 ms 208 KB Output is correct
5 Correct 86 ms 208 KB Output is correct
6 Correct 57 ms 208 KB Output is correct
7 Correct 127 ms 208 KB Output is correct
8 Correct 124 ms 208 KB Output is correct
9 Correct 139 ms 208 KB Output is correct
10 Correct 135 ms 208 KB Output is correct
11 Correct 1195 ms 208 KB Output is correct
12 Correct 1211 ms 208 KB Output is correct
13 Correct 1185 ms 256 KB Output is correct
14 Correct 619 ms 208 KB Output is correct
15 Correct 872 ms 208 KB Output is correct
16 Correct 1028 ms 208 KB Output is correct
17 Correct 1022 ms 208 KB Output is correct
18 Correct 1313 ms 208 KB Output is correct
19 Correct 1188 ms 208 KB Output is correct
20 Correct 1156 ms 208 KB Output is correct
21 Correct 1336 ms 208 KB Output is correct
22 Correct 1419 ms 208 KB Output is correct
23 Correct 1797 ms 208 KB Output is correct
24 Correct 1227 ms 208 KB Output is correct
25 Correct 1588 ms 208 KB Output is correct
26 Correct 1855 ms 208 KB Output is correct
27 Correct 1959 ms 208 KB Output is correct
28 Correct 1479 ms 208 KB Output is correct
29 Correct 1953 ms 208 KB Output is correct
30 Correct 1974 ms 208 KB Output is correct
31 Correct 1737 ms 208 KB Output is correct
32 Correct 1973 ms 208 KB Output is correct
33 Correct 2012 ms 208 KB Output is correct
34 Correct 1503 ms 208 KB Output is correct
35 Correct 1820 ms 208 KB Output is correct
36 Correct 1689 ms 208 KB Output is correct
37 Correct 1586 ms 208 KB Output is correct
38 Correct 1539 ms 208 KB Output is correct
39 Correct 1556 ms 208 KB Output is correct
40 Correct 1578 ms 208 KB Output is correct
41 Correct 1624 ms 208 KB Output is correct
42 Correct 1622 ms 208 KB Output is correct
43 Correct 1455 ms 208 KB Output is correct
44 Correct 1769 ms 208 KB Output is correct
45 Correct 1243 ms 208 KB Output is correct
46 Correct 1506 ms 208 KB Output is correct
47 Correct 970 ms 208 KB Output is correct
48 Correct 1195 ms 208 KB Output is correct
49 Correct 1879 ms 208 KB Output is correct
50 Correct 1496 ms 208 KB Output is correct
51 Correct 1571 ms 208 KB Output is correct
52 Correct 1193 ms 208 KB Output is correct