program1.cpp: In function `int dfs(int)': program1.cpp:11: warning: comparison between signed and unsigned integer expressions program1.cpp:14: warning: control reaches end of non-void function program1.cpp: In function `int main()': program1.cpp:19: warning: char format, different type arg (arg 2) program1.cpp:26: warning: char format, different type arg (arg 2) program1.cpp:29: warning: char format, different type arg (arg 2) program1.cpp:35: warning: char format, different type arg (arg 2) program1.cpp:16: warning: unused variable `int n'