#include <assert.h>
#include <limits.h>
#include <stdlib.h>

int threefourths(int x) {
  int p = x >> 2, q = x & 3;
  return p + (p << 1) + q - ((!!q & (~x >> 31)) & 1);
}

int randi() {
  if (rand() & 1) {
    return rand();
  } else {
    return ~rand();
  }
}

int main() {
  assert(RAND_MAX == INT_MAX);

  const int test_cases = 1e8;
  for (int i = 0; i < test_cases; i++) {
    int x = randi();
    assert(threefourths(x) == (long long) x * 3 / 4);
  }
}