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#include <stdio.h>

int main(void) {
	for ( int i =  0 ; i <  5 ; i ++ ) {
		
		for(int j = i; j > 0; j--)
			printf("%d", j);
		
		for ( int j = 0 ; j <= i ; j ++ )
			printf("%d", j);
		
		printf("\n");
	}
		
	return 0;
}
Success #stdin #stdout 0s 5272KB
stdin
Standard input is empty
stdout
0
101
21012
3210123
432101234