/in/foo.cc: In function 'int read()':
/in/foo.cc:18:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
         if (ch=='-') f=-1; ch=getchar();
         ^~
/in/foo.cc:18:28: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         if (ch=='-') f=-1; ch=getchar();
                            ^~
/in/foo.cc: In function 'int judge(int)':
/in/foo.cc:43:5: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if (x==y){
     ^~
/in/foo.cc:45:13: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
         last=x;
         ~~~~^~