Saskaitiet veidus, kā uzrakstīt ciparu ar atkārtotiem cipariem
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Izvade
#practiceLinkDiv { display: none !important; } Dota virkne, kas satur skaitļa ciparus. Numurā var būt daudz tādu pašu nepārtrauktu ciparu. Uzdevums ir saskaitīt skaitļa rakstīšanas veidus.
Piemēram, apsveriet 8884441100, to var uzrakstīt vienkārši kā trīskārši astoņi trīskārši četri dubultā divi un dubultā nulle. Var arī rakstīt kā dubultā astoņi astoņi četri dubultā četri divi divi dubultā nulle.
Piemēri:
Input : num = 100 Output : 2 The number 100 has only 2 possibilities 1) one zero zero 2) one double zero. Input : num = 11112 Output: 8 1 1 1 1 2 11 1 1 2 1 1 11 2 1 11 1 2 11 11 2 1 111 2 111 1 2 1111 2 Input : num = 8884441100 Output: 64 Input : num = 12345 Output: 1 Input : num = 11111 Output: 16Recommended Practice Uzrakstiet numuru Izmēģiniet to!
Šī ir vienkārša permutācijas un kombinācijas problēma. Ja mēs ņemam piemēru testa gadījumam, kas dots jautājumā 11112. Atbilde ir atkarīga no iespējamo apakšvirkņu skaita 1111. Iespējamo apakšvirkņu skaits '1111' ir 2^3 = 8, jo tas ir kombināciju skaits no 4 - 1 = 3 atdalītāji '|' starp divām virknes rakstzīmēm (virknes attēlotā skaitļa cipari): '1|1|1|1'. Tā kā mūsu kombinācijas būs atkarīgas no tā, vai mēs izvēlamies konkrētu 1, un '2' būs tikai viena iespēja 2^0 = 1, tāpēc atbilde uz '11112' būs 8*1 = 8.
Tātad pieeja ir saskaitīt konkrēto nepārtraukto ciparu virknē un reizināt 2^ (skaits-1) ar iepriekšējo rezultātu.
C++ // C++ program to count number of ways we // can spell a number #include using namespace std ; typedef long long int ll ; // Function to calculate all possible spells of // a number with repeated digits // num --> string which is favourite number ll spellsCount ( string num ) { int n = num . length (); // final count of total possible spells ll result = 1 ; // iterate through complete number for ( int i = 0 ; i < n ; i ++ ) { // count contiguous frequency of particular // digit num[i] int count = 1 ; while ( i < n -1 && num [ i + 1 ] == num [ i ]) { count ++ ; i ++ ; } // Compute 2^(count-1) and multiply with result result = result * pow ( 2 count -1 ); } return result ; } // Driver program to run the case int main () { string num = '11112' ; cout < < spellsCount ( num ); return 0 ; }
Java // Java program to count number of ways we // can spell a number import java.io.* ; class GFG { // Function to calculate all possible // spells of a number with repeated digits // num --> string which is favourite number static long spellsCount ( String num ) { int n = num . length (); // final count of total possible spells long result = 1 ; // iterate through complete number for ( int i = 0 ; i < n ; i ++ ) { // count contiguous frequency of // particular digit num[i] int count = 1 ; while ( i < n - 1 && num . charAt ( i + 1 ) == num . charAt ( i )) { count ++ ; i ++ ; } // Compute 2^(count-1) and multiply // with result result = result * ( long ) Math . pow ( 2 count - 1 ); } return result ; } public static void main ( String [] args ) { String num = '11112' ; System . out . print ( spellsCount ( num )); } } // This code is contributed by Anant Agarwal.
Python3 # Python3 program to count number of # ways we can spell a number # Function to calculate all possible # spells of a number with repeated # digits num --> string which is # favourite number def spellsCount ( num ): n = len ( num ); # final count of total # possible spells result = 1 ; # iterate through complete # number i = 0 ; while ( i < n ): # count contiguous frequency # of particular digit num[i] count = 1 ; while ( i < n - 1 and num [ i + 1 ] == num [ i ]): count += 1 ; i += 1 ; # Compute 2^(count-1) and # multiply with result result = result * int ( pow ( 2 count - 1 )); i += 1 ; return result ; # Driver Code num = '11112' ; print ( spellsCount ( num )); # This code is contributed # by mits
C# // C# program to count number of ways we // can spell a number using System ; class GFG { // Function to calculate all possible // spells of a number with repeated // digits num --> string which is // favourite number static long spellsCount ( String num ) { int n = num . Length ; // final count of total possible // spells long result = 1 ; // iterate through complete number for ( int i = 0 ; i < n ; i ++ ) { // count contiguous frequency of // particular digit num[i] int count = 1 ; while ( i < n - 1 && num [ i + 1 ] == num [ i ]) { count ++ ; i ++ ; } // Compute 2^(count-1) and multiply // with result result = result * ( long ) Math . Pow ( 2 count - 1 ); } return result ; } // Driver code public static void Main () { String num = '11112' ; Console . Write ( spellsCount ( num )); } } // This code is contributed by nitin mittal.
PHP // PHP program to count // number of ways we // can spell a number // Function to calculate // all possible spells of // a number with repeated // digits num --> string // which is favourite number function spellsCount ( $num ) { $n = strlen ( $num ); // final count of total // possible spells $result = 1 ; // iterate through // complete number for ( $i = 0 ; $i < $n ; $i ++ ) { // count contiguous frequency // of particular digit num[i] $count = 1 ; while ( $i < $n - 1 && $num [ $i + 1 ] == $num [ $i ]) { $count ++ ; $i ++ ; } // Compute 2^(count-1) and // multiply with result $result = $result * pow ( 2 $count - 1 ); } return $result ; } // Driver Code $num = '11112' ; echo spellsCount ( $num ); // This code is contributed // by nitin mittal. ?>
JavaScript < script > // Javascript program to count number of // ways we can spell a number // Function to calculate all possible // spells of a number with repeated // digits num --> string which is // favourite number function spellsCount ( num ) { let n = num . length ; // Final count of total possible // spells let result = 1 ; // Iterate through complete number for ( let i = 0 ; i < n ; i ++ ) { // Count contiguous frequency of // particular digit num[i] let count = 1 ; while ( i < n - 1 && num [ i + 1 ] == num [ i ]) { count ++ ; i ++ ; } // Compute 2^(count-1) and multiply // with result result = result * Math . pow ( 2 count - 1 ); } return result ; } // Driver code let num = '11112' ; document . write ( spellsCount ( num )); // This code is contributed by code_hunt < /script>
Izvade
8
Laika sarežģītība: O(n*log(n))
Palīgtelpa: O(1)
Ja jums ir cita pieeja šīs problēmas risināšanai, lūdzu, dalieties tajā.
