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- <?php
- function Euler_8()
- {
- $s = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450";
- $_max = 0;
- $_t = 1;
- $_len = 0;
- foreach(range(0, 999) as $i)
- {
- if($s[$i] == "0")
- {
- $_t = 1;
- $_len = 0;
- continue;
- }
- if($_len == 5)
- $_t /= (int)$s[$i-5];
- else
- $_len += 1;
- $_t *= (int)$s[$i];
- if($_t > $_max)
- $_max = $_t;
- }
- echo $_max; // Print greatest product of five consecutive digits
- }
- $start = microtime(TRUE);
- Euler_8();
- $end = microtime(TRUE)-$start;
- echo "<br/>Time: ".($end*1000)." ms";
- ?>
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