Compilare: user.cpp: In function ‘void processState(int)’: user.cpp:42:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (color[currState[j]] == 0) ^ user.cpp:43:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] color[currState[j]] = curr++; ^ user.cpp:48:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] currState[j] = color[currState[j]]; ^ user.cpp: In function ‘int main()’: user.cpp:90:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] currState[currSize++] = 0; ^ user.cpp:108:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (color[cachedState[j]] == -1) ^ user.cpp:109:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] color[cachedState[j]] = j; ^ user.cpp:111:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] pairNodes[j] = color[cachedState[j]]; ^ user.cpp:112:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] pairNodes[color[cachedState[j]]] = j; ^ user.cpp:58:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &N, &K, &X, &M); ^ user.cpp:61:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^