/in/foo.cc: In function 'int main()':
/in/foo.cc:9:8: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  cin>>s+1;
       ~^~
/in/foo.cc:7:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k,l=0,n,m,al,bl,ar,br;char cc;
        ^
/in/foo.cc:7:37: warning: 'cc' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int i,j,k,l=0,n,m,al,bl,ar,br;char cc;
                                     ^~
/in/foo.cc:22:4: warning: 'm' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if(i<=m) {
    ^~