View Compilation Error

0_0_37740355_7210.cpp:7:10: error: '::main' must return 'int'
 int main(){
          ^
0_0_37740355_7210.cpp: In function 'int main()':
0_0_37740355_7210.cpp:8:11: error: array must be initialized with a brace-enclosed initializer
  int f[0]=0;
           ^
0_0_37740355_7210.cpp:18:11: error: 't' was not declared in this scope
     while(t--){
           ^
0_0_37740355_7210.cpp:19:14: error: 'n' was not declared in this scope
         cin>>n;
              ^