Compilare: user.cpp: In function ‘void readData()’: user.cpp:37:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); M = N * (N - 1) / 2; ^ user.cpp:39:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int u, v; scanf("%d%d", &u, &v); ^ user.cpp: In function ‘void solveComponent(int)’: user.cpp:193:45: warning: array subscript is below array bounds [-Warray-bounds] checked[node_1] = checked[node_2] = true; ^