subperm.cpp: In function 'int verif(int, int)': subperm.cpp:12: warning: comparison between signed and unsigned integer expressions subperm.cpp: In function 'void bfs(int)': subperm.cpp:28: warning: comparison between signed and unsigned integer expressions subperm.cpp: In function 'int main()': subperm.cpp:44: warning: unused variable 'j' subperm.cpp:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result subperm.cpp:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result subperm.cpp:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result subperm.cpp:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result