View Compilation Error

0_0_13795526_10648.cpp:1:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_13795526_10648.cpp:2:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_13795526_10648.cpp:3:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_13795526_10648.cpp: In function 'LL change(char*, LL)':
0_0_13795526_10648.cpp:29:23: error: 'strlen' was not declared in this scope
     int len = strlen(s);
                       ^
0_0_13795526_10648.cpp:31:9: error: expected ';' before 'ans'
         ans = (ans * 10 + a[i] - '0')%m;
         ^
0_0_13795526_10648.cpp:31:40: error: expected ')' before ';' token
         ans = (ans * 10 + a[i] - '0')%m;
                                        ^
0_0_13795526_10648.cpp: At global scope:
0_0_13795526_10648.cpp:33:5: error: expected unqualified-id before 'return'
     return ans ;
     ^
0_0_13795526_10648.cpp:34:1: error: expected declaration before '}' token
 }
 ^