/in/foo.c:2:1: warning: data definition has no type or storage class
 T,ans,t,n;main(){
 ^
/in/foo.c:2:1: warning: type defaults to 'int' in declaration of 'T' [-Wimplicit-int]
/in/foo.c:2:3: warning: type defaults to 'int' in declaration of 'ans' [-Wimplicit-int]
 T,ans,t,n;main(){
   ^~~
/in/foo.c:2:7: warning: type defaults to 'int' in declaration of 't' [-Wimplicit-int]
 T,ans,t,n;main(){
       ^
/in/foo.c:2:9: warning: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
 T,ans,t,n;main(){
         ^
/in/foo.c:2:11: warning: return type defaults to 'int' [-Wimplicit-int]
 T,ans,t,n;main(){
           ^~~~