gcd 最大公约数 模版!
1:
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#define ll long long ll gcd(ll a,ll b) { if(a==0) { return b; }else { return gcd(b % a,a); } }
2:
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int64 gcd(int64 a, int64 b) { return (b != 0) ? gcd(b, a % b) : a; }
3:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
LL gcd(LL a, LL b) { return b == 0 ? a : gcd(b, a % b); }
一道又一道,好高兴!