Main.c: In function 'main':
Main.c:23:5: error: expected declaration specifiers before 'scanf'
   23 |     scanf("%d%d",&n,&r);
      |     ^~~~~
Main.c:25:5: error: expected declaration specifiers before 'if'
   25 |     if(r%2==0){
      |     ^~
Main.c:29:5: error: expected declaration specifiers before 'else'
   29 |     else{
      |     ^~~~
Main.c:39:5: error: expected declaration specifiers before 'sz'
   39 |     sz=2*rz;
      |     ^~
Main.c:40:5: error: expected declaration specifiers before 'for'
   40 |     for(i=0;i<rw;i++){
      |     ^~~
Main.c:40:13: error: expected declaration specifiers before 'i'
   40 |     for(i=0;i<rw;i++){
      |             ^
Main.c:40:18: error: expected declaration specifiers before 'i'
   40 |     for(i=0;i<rw;i++){
      |                  ^
Main.c:54:5: error: expected declaration specifiers before 'if'
   54 |     if(rw==rz){
      |     ^~
Main.c:57:5: error: expected declaration specifiers before 'else'
   57 |     else if(rw>rz){
      |     ^~~~
Main.c:60:5: error: expected declaration specifiers before 'else'
   60 |     else{
      |     ^~~~
Main.c:63:5: error: expected declaration specifiers before 'return'
   63 |     return 0;
      |     ^~~~~~
Main.c:64:1: error: expected declaration specifiers before '}' token
   64 | }
      | ^
Main.c:24:18: error: declaration for parameter 'sz' but no such parameter
   24 |     int rw,rz,sw,sz;
      |                  ^~
Main.c:24:15: error: declaration for parameter 'sw' but no such parameter
   24 |     int rw,rz,sw,sz;
      |               ^~
Main.c:24:12: error: declaration for parameter 'rz' but no such parameter
   24 |     int rw,rz,sw,sz;
      |            ^~
Main.c:24:9: error: declaration for parameter 'rw' but no such parameter
   24 |     int rw,rz,sw,sz;
      |         ^~
Main.c:22:11: error: declaration for parameter 'r' but no such parameter
   22 |     int n,r;
      |           ^
Main.c:22:9: error: declaration for parameter 'n' but no such parameter
   22 |     int n,r;
      |         ^
Main.c:65: error: expected '{' at end of input