Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:12: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void euler()’: user.cpp:33: warning: operation on ‘k’ may be undefined user.cpp: In function ‘int main()’: user.cpp:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result