View Compilation Error

0_0_37513564_1517.cpp: In function 'constexpr ll cfloor(long double)':
0_0_37513564_1517.cpp:53:1: error: body of constexpr function 'constexpr ll cfloor(long double)' not a return-statement
 }
 ^
0_0_37513564_1517.cpp: In function 'constexpr ll cceil(long double)':
0_0_37513564_1517.cpp:58:1: error: body of constexpr function 'constexpr ll cceil(long double)' not a return-statement
 }
 ^
0_0_37513564_1517.cpp: In function 'constexpr ll mpow(ll, ll, ll)':
0_0_37513564_1517.cpp:72:1: error: body of constexpr function 'constexpr ll mpow(ll, ll, ll)' not a return-statement
 }
 ^