View Compilation Error

0_0_35398576_18994.cpp: In function 'int main()':
0_0_35398576_18994.cpp:80:28: error: 'inv2' was not declared in this scope
         printf("%lld\n", ((inv2 + gn * invn % P) % P + P) % P);
                            ^
0_0_35398576_18994.cpp:80:35: error: 'gn' was not declared in this scope
         printf("%lld\n", ((inv2 + gn * invn % P) % P + P) % P);
                                   ^
0_0_35398576_18994.cpp:80:40: error: 'invn' was not declared in this scope
         printf("%lld\n", ((inv2 + gn * invn % P) % P + P) % P);
                                        ^
0_0_35398576_18994.cpp:80:47: error: 'P' was not declared in this scope
         printf("%lld\n", ((inv2 + gn * invn % P) % P + P) % P);
                                               ^