Shortening codes (SPOJ)

list of problems

ID	NAME	CODE	USERS	ACC %
53	Kamil	KAMIL	189	53.37
246	Plant a Christmas Tree	CTQUINE	23	35.98
378	Size Contest	SIZECON	265	46.57
1492	Lexicographic sort	SLEXSORT	38	52.70
1690	Intercept	INTER	12	22.71
5642	Fibonacci numbers	FIBON	251	48.58
5656	Binary clock	BINCLOCK	38	40.29
5659	Pascal’s triangle	PASCAL_T	58	54.52
5666	Next permutation	NEXTPERM	64	55.48
5671	Roman calculator	ROMANCAL	31	55.65
5675	Gregorian calendar	GREGCAL	23	48.31
5678	Zeros of factorial	FACTZERO	131	60.24
5681	Factorial length	FACTLENG	197	43.96
5828	Positional notations	POS_NOTA	38	56.16
5829	Factoradic	FACTORAD	28	63.88
5842	Polybius square	POLYBIUS	80	57.76
5910	Checking sudoku	SUDCHECK	31	57.29
6088	Sorting points	XYZ_SORT	60	48.23
6119	Function σ	SIGMA_EN	46	48.61
6120	Totient function	TOTIENT	34	54.12
6277	Morse code	MORSE_CD	41	54.98
6295	Area Difference	SQDIFF	45	44.81
6366	Reverse Polish notation	RPN	22	59.20
6388	Next power of 2	POWEROF2	131	47.65
6411	Dos Date (all languages available)	DDATE2	65	56.66
6454	Street parade (challenge)	S_PARADE	39	47.47
6496	Biggest sum of a coherent subsequence	B_S_C_S	35	55.94
6529	Traversing Grid (challenge)	TR_GRID	43	58.87
6572	Look and say (challenge)	LOOK_SAY	46	66.58
6586	Anagram (challenge)	ANAGRAMS	67	53.85
6597	Sums in a triangle (challenge)	TRI_SUMS	311	59.86
6600	Weighing	WEIGHING	16	67.09
6608	Count on Cantor (challenge)	CANTON2	50	64.56
6621	Binomial coefficient	BINOMIAL	57	48.32
6626	Printing triangle	ELGNAIRT	41	54.41
6630	Spiral	SPIRAL	14	65.84
6646	Fully Parenthesized Expression	BRACKETS	13	37.90
6699	Type of triangle	TRIAN	70	46.78
6904	Shift	SHIFT	21	58.19
7032	Adding reversed numbers (challenge)	ADDING	61	42.45
7105	Reverse the Input	REVINPUT	53	41.74
7183	Pizza (challenge)	PIZZAS	73	54.65
7224	Prime or not	ISPRIME	43	31.62
7225	Word To Number	WORDNUM	26	79.39
7289	Reverse text	MB2	50	35.71
7324	Remake	REMAKE	15	61.84
7334	PP numbers	MB1CH	16	57.23
7480	Nth Prime	NPRIME	36	36.66
7483	C style constants	CCONST	42	47.96
7532	Fibonacci check	ISFIB	46	54.59