/in/foo.c: In function 'main':
/in/foo.c:22:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(;j>=0;j--)
     ^~~
/in/foo.c:24:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  for(i=0;i<=wei-1;i++,l--)
  ^~~
/in/foo.c:4:9: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
 {   int j,n,i,k,wei,t,l,xmax=0,xmin=0;
         ^