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problem_17.cpp
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problem_17.cpp
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#include <iostream>
#include <vector>
#include <string>
using namespace std ;
int main( int argc , char** argv ) {
vector<string> unit(11) ;
vector<string> dec(10) ;
vector<string> excep(2) ;
excep[0] = "eleven" ;
excep[1] = "twelve" ;
excep[2] = "thirteen";
unit[1] = "one" ;
unit[2] = "two" ;
unit[3] = "three" ;
unit[4] = "four" ;
unit[5] = "five" ;
unit[6] = "six" ;
unit[7] = "seven" ;
unit[8] = "eight" ;
unit[9] = "nine" ;
unit[10] = "ten" ;
dec[2] = "twenty" ;
dec[3] = "thirty" ;
dec[4] = "forty" ;
dec[5] = "fifty" ;
dec[6] = "sixty" ;
dec[7] = "seventy" ;
dec[8] = "eighty" ;
dec[9] = "ninety" ;
unsigned long int sum = 0 ; // 11 12 13
for ( int i = 1 ; i <= 10 ; i++ ) sum += unit[i].length() ; //1 to 10
cout << sum << endl ;
sum += excep[0].length() + excep[1].length() + excep[2].length() ;
for( int i = 4 ; i <= 9 ; i++ ) sum += ( unit[i].length() + 4 ) ; // 14 to 19 ; 4 = "teen"
sum -= 2 ; //eighteen
cout << sum << endl ;
for( int i = 2 ; i <= 9 ; i++ ) sum += dec[i].length() ; //20 to 90
for ( int i = 2 ; i <= 9 ; i++ ) {
for ( int j = 1 ; j <= 9 ; j++ )
sum += ( dec[i].length() + unit[j].length() ) ; //21 to 99
}
cout << sum << endl ;
string s = "hundred" ;
const int hund_len = s.length() ;
const int aNd = 3 ;
for ( int k = 1 ; k <= 9 ; k++ ) {
sum += ( unit[k].length() + hund_len ) ;
//101 to 110... 201 to 210 ... 301 to 310 and so on
for ( int i = 1 ; i <= 10 ; i++ ) sum += ( unit[k].length() + hund_len + unit[i].length() + aNd) ;
for ( int i = 4 ; i <= 9 ; i++ ) sum += ( unit[k].length() + hund_len + unit[i].length() + 4 + aNd) ;
sum -= 2 ; //eighteen
//114 to 119... 214 to 219... 314 to 319 and so on
for ( int i = 2 ; i <= 9 ; i++ ) sum += ( unit[k].length() + hund_len + dec[i].length() + aNd) ;
// 120 130 140... 220 230 240... and so on
for ( int j = 0 ; j <= 2 ; j++ ) sum += ( unit[k].length() + hund_len + excep[j].length() + aNd) ;
// 111 112 113... 211 212 213... and so on
for ( int i = 2 ; i <= 9 ; i++ ) {
for ( int j = 1 ; j <= 9 ; j++ ) sum += ( unit[k].length() + hund_len + dec[i].length() + unit[j].length() + aNd ) ;
}
// 121 to 199... 221 to 299 ... 921 to 999
}
s = "one thousand" ;
sum += s.length() ;
cout << sum << endl ;
return 0 ;
}