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#include <bits/stdc++.h>
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using namespace std;
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//最大公约数，辗转相除法
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int gcd(int a, int b) {
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if (b == 0) return a;
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return gcd(b, a % b);
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}
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int main() {
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int n;
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scanf("%d", &n);
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int d = 0, a;
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for (int i = 1; i <= n; i++) {
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scanf("%d", &a);
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d = gcd(d, abs(a));
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}
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printf("%d", d);
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return 0;
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} |
