fix #3: fix is_prime for msvc

Author: yosupo06

atcoder/internal_math.hpp

@@ -83,7 +83,8 @@ constexpr bool is_prime_constexpr(int n) {
     if (n % 2 == 0) return false;
     long long d = n - 1;
     while (d % 2 == 0) d /= 2;
-    for (long long a : {2, 7, 61}) {
+    constexpr long long bases[3] = {2, 7, 61};
+    for (long long a : bases) {
         long long t = d;
         long long y = pow_mod_constexpr(a, t, n);
         while (t != n - 1 && y != 1 && y != n - 1) {