Eroare de compilare: user.cpp: In function `void dfs(int, int)': user.cpp:41: warning: comparison between signed and unsigned integer expressions user.cpp: In function `void parc(int, int)': user.cpp:78: warning: comparison between signed and unsigned integer expressions user.cpp: In function `int main()': user.cpp:139: error: call of overloaded `sqrt(int&)' is ambiguous /usr/include/bits/mathcalls.h:157: error: candidates are: double sqrt(double) /usr/include/c++/3.3/cmath:550: error: long double std::sqrt(long double) /usr/include/c++/3.3/cmath:546: error: float std::sqrt(float) user.cpp:139: error: call of overloaded `sqrt(int&)' is ambiguous /usr/include/bits/mathcalls.h:157: error: candidates are: double sqrt(double) /usr/include/c++/3.3/cmath:550: error: long double std::sqrt(long double) /usr/include/c++/3.3/cmath:546: error: float std::sqrt(float)