运行 ID: 41156

Main.cc: In instantiation of ‘static constexpr Modular Modular::raw(int) [with int mod = 998244353]’:
Main.cc:37:78:   required from ‘constexpr Modular<998244353> operator+(Modular<998244353>, Modular<998244353>)’
Main.cc:64:88:   required from ‘constexpr Modular<998244353>& operator+=(Modular<998244353>&, Modular<998244353>)’
Main.cc:113:55:   required from here
Main.cc:33:5: error: body of constexpr function ‘static constexpr Modular Modular::raw(int) [with int mod = 998244353]’ not a return-statement
     }
     ^