Main.cc: In function ‘int bag(int, int)’:
Main.cc:11:18: error: ‘n’ was not declared in this scope
if(bag(ts-a[tn],n-1)==1){
^
Main.cc:11:18: note: suggested alternative: ‘tn’
if(bag(ts-a[tn],n-1)==1){
^
tn