Compilare: user.cpp: In function ‘void readData()’: user.cpp:56:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < G[x].size(); ++j) ^ user.cpp:63:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j == G[x].size()) ^ user.cpp: In function ‘bool impossibleEdge(int&, int&)’: user.cpp:240:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < imposibile[x].size(); ++i) ^ user.cpp: In function ‘void readData()’: user.cpp:47:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:51:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ user.cpp: In function ‘void setFinalEdges()’: user.cpp:156:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &e); ^ user.cpp:162:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lf", &a, &b, &chance); ^