View Compilation Error

0_0_27496959_32486.cpp: In function 'll sum(int)':
0_0_27496959_32486.cpp:32:8: error: 'mod' was not declared in this scope
   res%=mod;
        ^
0_0_27496959_32486.cpp: In function 'int main()':
0_0_27496959_32486.cpp:37:2: error: 'T' was not declared in this scope
  T=read();
  ^
0_0_27496959_32486.cpp:44:7: error: expected primary-expression before ')' token
   for()
       ^
0_0_27496959_32486.cpp:45:2: error: expected primary-expression before '}' token
  }
  ^
0_0_27496959_32486.cpp:45:2: error: expected ';' before '}' token
0_0_27496959_32486.cpp:45:2: error: expected primary-expression before '}' token
0_0_27496959_32486.cpp:45:2: error: expected ')' before '}' token
0_0_27496959_32486.cpp:45:2: error: expected primary-expression before '}' token