January 2022 enrollments are closed and the course commences on 8th of January, 2022. For future cohorts

SHAHBG Solution

#include <stdio.h>
#include <stdlib.h>

#define DEBUG 0

int main ( int argc , char * argv[] ) {

int n;
int i = 0;
int hash;
scanf("%d" , &n);

for ( i = 0 ; i < 300000 ; i++ ) {
hash[i] = 0;
}

int group = 0;
int count = 0;
for ( i = 0 ; i < n ; i++ ) {
int x;
scanf("%d" , &x);

hash[x] = 1;

// New group when no one is around him
if ( x > 0 && x < 30000 && hash[x-1] == 0 && hash[x+1] == 0 ) {
count ++;
}
// when person to the left is present
else if ( x > 0 && x < 30000 && hash[x-1] == 1 && hash[x+1] == 0 ) {
// no change to count
}
// when person to the right is present
else if ( x > 0 && x < 30000 && hash[x-1] == 0 && hash[x+1] == 1 ) {
// no change to count
}
else if ( x > 0 && x < 30000 && hash[x-1] == 1 && hash[x+1] == 1 ) {
count --;
}
else if ( x == 0 && hash[x+1] == 1 ) {
// No change to count
}
else if ( x == 0 && hash[x+1] == 0 ) {
count ++;
}
else if ( x == 30000 && hash[x-1] == 1 ) {
// No change to count
}
else if ( x == 30000 && hash[x-1] == 0 ) {
count ++;
}
printf("%d\n" , count);
}
printf("Justice\n");
return 0;
}