Problem:
Score : 200 points

Problem Statement

You are given a string S consisting of lowercase English letters.
We will write down this string, starting a new line after every w letters. Print the string obtained by concatenating the letters at the beginnings of these lines from top to bottom.

Constraints

1 \leq w \leq |S| \leq 1000

S consists of lowercase English letters.

w is an integer.

Input

Input is given from Standard Input in the following format:

S
w

Output

Print the desired string in one line.

Sample Input 1

abcdefgh
3

Sample Output 1

adg

When we write down abcdefgh, starting a new line after every three letters, we get the following:

abc

def

gh

Concatenating the letters at the beginnings of these lines, we obtain adg.

Sample Input 2

lllll
1

Sample Output 2

lllll

Sample Input 3

souuundhound
2

Sample Output 3

suudon

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(void){
    int count,count2;
    int win=0;
    int n;
    int r=0,b=0,w;
    int maxval=99999,maxnum=0,sum=0;
    int l[105];
    char s[1050];
    
    scanf("%s",s);
    scanf("%d",&w);

    for(count=0;s[count]!='\0';count++){
        if(count==0||count%w==0){printf("%c",s[count]);}
    }
    return 0;
}
 
int min(int a,int b){
    int ans;
    if(a>b){return b;}
    else {return a;}
}
 
int max(int a,int b){
    int ans;
    if(a>b){return a;}
    else {return b;}
}