tcast.cpp: In function 'void copiaza(int)': tcast.cpp:24: warning: comparison between signed and unsigned integer expressions tcast.cpp: In function 'void restaureaza(int)': tcast.cpp:28: warning: comparison between signed and unsigned integer expressions tcast.cpp: In function 'void DFS(int, int)': tcast.cpp:42: warning: comparison between signed and unsigned integer expressions tcast.cpp:54: warning: comparison between signed and unsigned integer expressions tcast.cpp:84: warning: comparison between signed and unsigned integer expressions tcast.cpp: In function 'int main()': tcast.cpp:99: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result tcast.cpp:100: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result tcast.cpp:101: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result tcast.cpp:104: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result tcast.cpp:110: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result