bit_strings_1617.cpp (171B)
1 #include <iostream> 2 3 int main() { 4 constexpr long long M = 1e9+7; 5 long long n, a{1}; 6 std::cin >> n; 7 while (--n >= 0) 8 a = (a * 2) % M; 9 std::cout << a << std::endl; 10 }
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bit_strings_1617.cpp (171B)
1 #include <iostream> 2 3 int main() { 4 constexpr long long M = 1e9+7; 5 long long n, a{1}; 6 std::cin >> n; 7 while (--n >= 0) 8 a = (a * 2) % M; 9 std::cout << a << std::endl; 10 }