/in/foo.cc: In function 'int main()':
/in/foo.cc:20:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0; j<=str.length()-1; j++) {
                ~^~~~~~~~~~~~~~~~

ValueError("invalid literal for int() with base 10: 'input1.txt|output1.txt|1|10|1024\\n'",)