Submission #19857

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
19857	2016-02-25 06:20:29	xhae	창문 (kriii4_C)	C++14	100 / 100	1 ms	1880 KiB

C

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#include <cstdio>
/**
 * Big integer class, optimized for decimal integers.
 * Stores and manipulates integers represented as byte arrays,
 * where each byte is a decimal digit. If you're looking for
 * robust, bug-free, efficient code, keep looking. This is a quick
 * and dirty hack. Some day I'll write a templatized BigInt, where
 * you will be able to select the base in which to store the 
 * number. When that day comes, most of this code will be thrown
 * away.
 *
 * BUGS:
 *      operator-(int) does not work.
 *
 *      BigInt doesn't play nice with long long. Either use int
 *      or string.
 *
 * INVARIANTS:
 *      - capacity is never smaller than 16
 *      - capacity is not the smallest it can be because every
 *         modifying member function first grows digits as much as
 *         it might ever need and then does its job.
 * FIELD TESTING:
 *      - Passed numerous problems on Valladolid, including
 *          107, 288, 324, 424, 465, 485, 495, 560, 619, 623, etc.
 *
 * COMPATIBILITY:
 *      - This class was written for the g++ compiler and uses some
 *          of the g++ extensions (like "long double" and the ">?="
 
 
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• Subtask 1: 3 / 3
• Subtask 2: 97 / 97