Compilare: user.cpp: In function ‘void go(int, int, int, int)’: user.cpp:51:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int u=0;u<path.size();++u) ^ user.cpp: In function ‘int main()’: user.cpp:93:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<H[j].size();++i) ^ user.cpp: In function ‘int readInt()’: user.cpp:27:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,BSIZE,stdin); ^ user.cpp:38:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,BSIZE,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:69:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclu2.in","r",stdin); ^ user.cpp:70:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclu2.out","w",stdout); ^ user.cpp:72:28: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,BSIZE,stdin); ^