Submission #19798

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
19798	2016-02-25 05:44:09	mitslll	창문 (kriii4_C)	C++98	100 / 100	0 ms	1716 KiB

C

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#include<cstdio>
#include<iostream>
#include<string>
#include<vector>
using namespace std;
typedef unsigned long long ull;
ull gcd(ull a, ull b){
    return ( a % b == 0 ) ? b : gcd(b, a % b);
}
const ull mod = 1000000007;
struct Solution { ull gcd, x, y;
    Solution(ull gcd, ull x, ull y)
        :gcd(gcd), x(x), y(y)
    {
        
    }
    
    
};
Solution extendedEuclid(ull a, ull b) {
  ull q = a / b, r = a % b;
  if(r == 0) return Solution(b, 0, 1); 
  Solution s = extendedEuclid(b, r);                                                                                                            
  // now, we have
  // s.gcd = s.x * b + s.y * r
  //       = s.x * b + s.y * (a - q * b)
  //       = s.y * a + (s.x - q * s.y) * b
  return Solution(s.gcd, s.y, s.x - q * s.y);
 
 
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• Subtask 1: 3 / 3
• Subtask 2: 97 / 97