Submission #1049291

#	Time	Username	Problem	Language	Result	Execution time	Memory
1049291		sleepntsheep	Infinite Race (EGOI24_infiniterace2)	C11	100 / 100	20 ms	2000 KiB

Main

#include <stdio.h>

int sgn(int x) {
  return x < 0 ? -1 : x > 0 ? 1 : 0;
}

int main() {
  int n, q, z = 1;
  scanf("%d%d", &n, &q);

  static int f[200000] = { 0 }, lap[200000] = { 0 };
  for (int x, y, i = 1; i <= q; ++i) {
    scanf("%d", &x);
    y = x * sgn(x);
    if (lap[y] != z) f[y] = 0;

    if (sgn(x) == -1) {
      f[y] = -1;
      lap[y] = z;
    } else {
      if (f[y] == 1)
        ++z;
      lap[y] = z;
      f[y] = 1;
    }
  }

  printf("%d\n", z - 1);

}

Compilation message (stderr)

Main.c: In function 'main':
Main.c:9:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |   scanf("%d%d", &n, &q);
      |   ^~~~~~~~~~~~~~~~~~~~~
Main.c:13:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%d", &x);
      |     ^~~~~~~~~~~~~~~

• Subtask 1: 29 / 29
• Subtask 2: 34 / 34
• Subtask 3: 22 / 22
• Subtask 4: 15 / 15