Compilare: user.cpp: In function ‘void doPairing(int)’: user.cpp:58:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graph[nod].size(); ++i) ^ user.cpp:61:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graph[nod].size(); ++i) { ^ user.cpp:68:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i + dist < v.size(); ++i) { ^ user.cpp: In function ‘void print()’: user.cpp:91:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); ++i) ^ user.cpp: In function ‘void doEuler(int, int, int, int)’: user.cpp:111:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graphPairing[nod].size(); ++i) { ^