/in/foo.c: In function 'main':
/in/foo.c:75:5: warning: 'return' with no value, in function returning non-void
     return;
     ^~~~~~
/in/foo.c:4:5: note: declared here
 int main()
     ^~~~
/in/foo.c:102:4: warning: 'return' with no value, in function returning non-void
    return;
    ^~~~~~
/in/foo.c:4:5: note: declared here
 int main()
     ^~~~
/in/foo.c:7:25: warning: unused variable 'flag1' [-Wunused-variable]
  int max,i,j,pos,flag=0,flag1=0,t,m;
                         ^~~~~
/in/foo.c:7:14: warning: variable 'pos' set but not used [-Wunused-but-set-variable]
  int max,i,j,pos,flag=0,flag1=0,t,m;
              ^~~