turn1.cpp: In function 'void dfs(int, int)': turn1.cpp:13: warning: comparison between signed and unsigned integer expressions turn1.cpp: In function 'int main()': turn1.cpp:18: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result turn1.cpp:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result turn1.cpp:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result turn1.cpp:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result turn1.cpp:20: warning: 'i1' may be used uninitialized in this function turn1.cpp:20: warning: 'i2' may be used uninitialized in this function turn1.cpp:20: warning: 'sol1' may be used uninitialized in this function turn1.cpp:20: warning: 'sol2' may be used uninitialized in this function