19 lines
313 B
C++
19 lines
313 B
C++
#include <bits/stdc++.h>
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using namespace std;
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typedef long long LL;
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LL x, y, ans;
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//辗转相除法
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LL gcd(LL a, LL b) {
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if (b == 0) return a;
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ans += 4 * b * (a / b);
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return gcd(b, a % b);
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}
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int main() {
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cin >> x >> y;
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gcd(x, y);
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printf("%lld\n", ans);
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return 0;
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} |