View Compilation Error

0_0_33633990_7358.cpp: In function 'int main()':
0_0_33633990_7358.cpp:36:5: error: 'io' was not declared in this scope
     io;
     ^
0_0_33633990_7358.cpp:51:40: error: 'mod' was not declared in this scope
                 f[i]=(f[i-1]+f[i-2]+1)%mod;
                                        ^