zapezi.cpp: In function 'void dfsdown(int, int)': zapezi.cpp:27: warning: comparison between signed and unsigned integer expressions zapezi.cpp:32: warning: comparison between signed and unsigned integer expressions zapezi.cpp: In function 'void dfsup(int, int)': zapezi.cpp:44: warning: comparison between signed and unsigned integer expressions zapezi.cpp:51: warning: comparison between signed and unsigned integer expressions zapezi.cpp:57: warning: comparison between signed and unsigned integer expressions zapezi.cpp:70: warning: comparison between signed and unsigned integer expressions zapezi.cpp: In function 'int main()': zapezi.cpp:79: warning: unused variable 'j' zapezi.cpp:80: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result zapezi.cpp:81: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result zapezi.cpp:82: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result zapezi.cpp:84: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result