title: Number Days Tank Will Become Empty
signature: number_days_tank_will_become_empty <- function(c, l) {
source_py: def number_days_tank_will_become_empty(C, l):
      if (l >= C):
          return C
      eq_root = ((math.sqrt((1 + (8 * (C - l)))) - 1) / 2)
      return (math.ceil(eq_root) + l)
source_cpp: int number_days_tank_will_become_empty(int C, int l) {
    if ( l >= C ) return C;
    double eq_root = ( std :: sqrt ( 1 + 8 * ( C - l ) ) - 1 ) / 2;
    return std :: ceil ( eq_root ) + l;
  }