Submission #9233

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
9233	2014-09-28 04:56:04	kcm1700	Quaternion inverse (kriii2_Q)	C++14	4 / 4	136 ms	1088 KiB

Q

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#include <cstdio>
#include <algorithm>
using namespace std;
int mod;
pair<long long, long long> extended_gcd(long long a, long long b) {
    if (b == 0) return make_pair(1, 0);
      pair<long long, long long> t = extended_gcd(b, a % b);
        return make_pair(t.second, t.first - t.second * (a / b));
}
long long modinverse(long long a, long long m) {
    return (extended_gcd(a, m).first % m + m) % m;
}
int main(){
  int T;
  scanf("%d%d",&mod,&T);
  while(T-->0){
    long long a,b,c,d;
    scanf("%lld%lld%lld%lld",&a,&b,&c,&d);
    long long tmp = (a*a+b*b+c*c+d*d) % mod;
    if (tmp == 0) {
      puts("0 0 0 0");
      continue;
    }
    tmp = modinverse(tmp, mod);
 
 
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• Subtask 1: 1 / 1
• Subtask 2: 3 / 3