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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
32 lines
694 B
C++
32 lines
694 B
C++
#include <iostream>
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#include <cstdio>
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using namespace std;
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const double eps = 1e-7;
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int cases, m, c, gg;
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double des, xs;
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bool flag;
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int gcd(int a, int b) {
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if (b == 0) return a; else return gcd(b, a%b);
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}
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double abs(double x) {
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if (x < 0) return -x; else return x;
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}
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int main() {
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scanf("%d", &cases);
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while (cases--) {
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scanf("%lf", &des);
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des = 4*des;
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xs = des-int(des);
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flag = true;if (abs(xs)>eps) flag = false;
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scanf("%d", &m);
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for (int i = 0; i < m; i++) {
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scanf("%d", &c);
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if (!i) gg = c; else gg = gcd(c, gg);
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}
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while ((gg&1)==0) gg>>=1;
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if (int(des)%gg!=0) flag = false;
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if (flag) puts("yes"); else puts("no");
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}
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return 0;
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}
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