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<?phpheader("Content-Type: text/plain");function microtime_float(){   list($usec, $sec) = explode(" ", microtime());   return ((float)$usec + (float)$sec);}$time_start = microtime_float();set_time_limit(0);// começa aqui$n = 400;$sextas = 0;$diasemana = 1; // monday/*	1 - monday	2 - tuesday	3 - wednesday	4 - thursday	5 - friday	6 - saturday	7 - sunday*/for($i=1900;$i<1900+$n;$i++){	if($i%4 == 0){ # ano bissexto		$fev = 29;	}else $fev = 28;		for($ii=1;$ii<=31;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." January ".$i."\n";		}	}		for($ii=1;$ii<=$fev;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." February ".$i."\n";		}	}	for($ii=1;$ii<=31;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." March ".$i."\n";		}	}	for($ii=1;$ii<=30;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." April ".$i."\n";		}	}	for($ii=1;$ii<=31;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." May ".$i."\n";		}	}	for($ii=1;$ii<=30;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." June ".$i."\n";		}	}	for($ii=1;$ii<=31;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." July ".$i."\n";		}	}	for($ii=1;$ii<=31;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." August ".$i."\n";		}	}	for($ii=1;$ii<=30;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." September ".$i."\n";		}	}	for($ii=1;$ii<=31;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." October ".$i."\n";		}	}	for($ii=1;$ii<=30;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." November ".$i."\n";		}	}	for($ii=1;$ii<=31;$ii++){		if($diasemana == 7){			$diasemana = 1;		}else $diasemana++;		if($ii == 13 && $diasemana == 5){			$sextas++;			echo $ii." December ".$i."\n";		}	}}echo "\n\n\n$sextas Fridays";// fim$time_end = microtime_float();$time = $time_end - $time_start;echo "\n\n\n\n$time seconds\n";	?>