// C program for printing the hollow triangle pattern

#include <stdio.h>

// Function for printing pattern

void pattern(int N)

{

int i, j, k = 0, space = 1, rows = N;

// For printing stars

for (i = rows; i >= 1; i--) {

for (j = 1; j <= i; j++) {

printf("*");

}

if (i != rows) {

// for printing space

for (k = 1; k <= space; k++) {

printf(" ");

}

// increment by 2

space = space + 2;

}

for (j = i; j >= 1; j--) {

if (j != rows)

printf("*");

}

printf("\n");

}

printf("\n");

}

// Driver code

int main()

{

// Get N

int N = 6;

// Print the pattern

pattern(N);

return 0;

}