Compilare: user.cpp: In function ‘char canMerge(int, int)’: user.cpp:51:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (!isMagic[c1] || !isMagic[c2]) ^ user.cpp:51:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (!isMagic[c1] || !isMagic[c2]) ^ user.cpp:53:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] int msk = 7 & (~isMagic[c1]) & (~isMagic[c2]); ^ user.cpp:53:46: warning: array subscript has type ‘char’ [-Wchar-subscripts] int msk = 7 & (~isMagic[c1]) & (~isMagic[c2]); ^ user.cpp: In function ‘bool query_aux()’: user.cpp:61:47: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if (rez = canMerge(t, u = physical[t].prv)) { ^ user.cpp:70:47: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if (rez = canMerge(t, u = physical[t].nxt)) { ^ user.cpp: In function ‘int main()’: user.cpp:95:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] isMagic[magics[1 << i]] = 1 << i; ^ user.cpp:94:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %c", &magics[1 << i]); ^ user.cpp:98:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:102:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &P); ^ user.cpp:103:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", buf); ^