Run id: 156830

Main.cc: In function 'int main()':
Main.cc:9:13: error: invalid types 'char[int]' for array subscript
  while (a[s1]!='\0'){
             ^
Main.cc:12:13: error: invalid types 'char[int]' for array subscript
  while (a[s2]!='\0'){
             ^