Alternating Character

ALTERNATING CHARACTER from Hackerrank.com
https://www.hackerrank.com/challenges/alternating-characters/problem
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#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
int main()
{
    char **s;
    long long int c = 0,i,j,n;
                scanf(“%llu”,&n);
                s = malloc(sizeof(char*)*n);
                for(i=0;i<n;i++)
                s[i] = malloc(sizeof(char)*250000);
                for(i=0;i<n;i++)
                {
                                scanf(” %[^\n]”,s[i]);
                }
                for(i=0;i<n;i++)
                {
                                c=0;
                                for(j=0;s[i][j];j++)
                                {
                                                if(s[i][j] == s[i][j+1])
                                                c++;
                                }
                                printf(“%llu\n”,c);
                }
    return 0;
}

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