/in/foo.c: In function 'main':
/in/foo.c:37:44: warning: unused variable 'n' [-Wunused-variable]
  int score1=0,score2=0,N,NA,NB,la,lb,xa,xb,n[201],a[201],b[201],na[201],nb[201];
                                            ^
/in/foo.c: In function 'vs':
/in/foo.c:32:9: warning: 'z' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return z;
         ^