Project Euler #13: Large sum | Hackerrank | Project Euler

  Large sum

Work out the first ten digits of the sum of N 50 - digit numbers.

Input Format

First line contains N, next N lines contain a 50 digit number each.

Constraints

1<=N<=10^3

Output Format

Print only first 10 digit of the final sum

Sample Input

5

37107287533902102798797998220837590246510135740250

46376937677490009712648124896970078050417018260538

74324986199524741059474233309513058123726617309629

91942213363574161572522430563301811072406154908250

23067588207539346171171980310421047513778063246676

Sample Output

2728190129

Explanation

Summing the numbers we get 2728190129820036131461476701043585006837989465343, first 10 digits are 2728190129.

Solution in python:

n = int(input())

tot=0

for i in range(n):

    a=int(input())

    tot=int(tot)+a;

while (tot >= 10000000000):

    tot = tot // 10

print(tot)

You can also run it on an online IDE :

https://ide.geeksforgeeks.org/40288644-2c69-4867-89bc-2432afbb48a5

Your feedback are always welcome! If you have any doubt you 

can contact me or leave a comment!  

Happy Coding!! Cheers!!!

Project Euler #17: Number to Words | Hackerrank | Project Euler

 Number to Words

The numbers 1 to 5 written out in words are One, Two, Three, Four, Five 

First character of each word will be capital letter for example:

 104382426112 is 

One Hundred Four Billion Three Hundred Eighty Two Million Four Hundred Twenty Six Thousand One Hundred and Twelve

Given a number, you have to write it in words.

Input Format

The first line contains an integer T, i.e., number of test cases.

Next T lines will contain an integer N.

Constraints

1<=T<=10

0<=N<=10^2

Output Format

Print the values corresponding to each test case.

Sample Input

2

10

17

Sample Output

Ten 

Seventeen

Solution : Source (Hackerrank)

#include <stdio.h>

#include <string.h>

#include <math.h>

#include <stdlib.h>

char digits[20][10] = {"","One","Two","Three","Four",

"Five","Six","Seven","Eight","Nine","Ten","Eleven",

"Twelve","Thirteen","Fourteen",

"Fifteen","Sixteen","Seventeen","Eighteen","Nineteen"};

char tens[11][10] =  {"","","Twenty","Thirty","Forty",

"Fifty","Sixty","Seventy","Eighty","Ninety"};

void word(int num){

    if(num/100)

        printf("%s Hundred ", digits[num/100]);

    if((num%100) < 20 && (num%100) > 0)

        printf("%s ",digits[num%100]);

    else if((num/10)%10){

        printf("%s ", tens[(num/10)%10]);

        if(num%10)

            printf("%s ", digits[num%10]);

    }

}

int main() {

    int t;

    scanf("%d", &t);

    while(t--){

        long long int num;

        scanf("%lld", &num);

        int tn = num / 1000000000000;

        int bn = (num / 1000000000) % 1000;

        int mn = (num / 1000000) % 1000;

        int th = (num / 1000) % 1000;

        int hd = num % 1000;

        //printf("%d %d %d %d %d\n", tn, bn, mn, th, hd);

        if((tn + bn + mn + th + hd) == 0)

            printf("Zero");

        if(tn){

            word(tn);

            printf("Trillion ");

        }

        if(bn){

            word(bn);

            printf("Billion ");

        }

        if(mn){

            word(mn);

            printf("Million ");

        }

        if(th){

            word(th);

            printf("Thousand ");

        }

        if(hd){

            word(hd);

        }

       printf("\n"); 

    }

    return 0;

}

You can also run it on an online IDE :

https://ide.geeksforgeeks.org/c658ddc7-5ffc-4db5-932a-ad8c3610f6df

Your feedback are always welcome! If you have any doubt you 

can contact me or leave a comment!  

Happy Coding!! Cheers!!!