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#include <bits/stdc++.h> using namespace std; long long gcd(long long a, long long b) { long long x, y, temp; if (a > b) { x = b, y = a; } else { x = a, y = b; } temp = y % x; while (temp > 0) { y = x; x = temp; temp = y % x; } return x; } int main() { long long m, n; while (cin >> m >> n) { long long ans = gcd(m, n); cout << ans << endl ; } return 0; }
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