turn1.cpp: In function `void dfs(int, int)': turn1.cpp:9: warning: comparison between signed and unsigned integer expressions turn1.cpp: In function `int main()': turn1.cpp:34: warning: comparison between signed and unsigned integer expressions turn1.cpp:41: warning: comparison between signed and unsigned integer expressions turn1.cpp:48: warning: comparison between signed and unsigned integer expressions turn1.cpp:20: warning: `int nr1' might be used uninitialized in this function turn1.cpp:20: warning: `int nr2' might be used uninitialized in this function