dir.cpp: In function `long int f_rcs(long int)': dir.cpp:32: warning: control reaches end of non-void function dir.cpp: In function `int read()': dir.cpp:36: warning: char format, different type arg (arg 3) dir.cpp:37: warning: control reaches end of non-void function dir.cpp: In function `int solve()': dir.cpp:47: warning: control reaches end of non-void function