Compilare: user.cpp: In function ‘void prepareHeavyPath()’: user.cpp:147:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0 ; j < Path[i].size() ; ++ j) ^ user.cpp: In function ‘int main()’: user.cpp:163:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(infile, "r", stdin); ^ user.cpp: In function ‘void getInt(int&)’: user.cpp:43:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, lim, stdin); ^ user.cpp:51:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, lim, stdin); ^