Compilare: user.cpp: In function ‘void BFS(std::pair<short int, short int>)’: user.cpp:45:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(I > 0 & I <= L & J >= 0 & J < C & ^ user.cpp:45:35: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(I > 0 & I <= L & J >= 0 & J < C & ^ user.cpp:45:44: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(I > 0 & I <= L & J >= 0 & J < C & ^ user.cpp:46:28: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] paper[I][J] == color & !visited[I][J]) ^ user.cpp: In function ‘int get_nr()’: user.cpp:84:13: warning: suggest parentheses around comparison in operand of ‘|’ [-Wparentheses] while(c < 48 | c > 57); ^ user.cpp:86:13: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] for(; c > 47 & c < 58; nr = nr * 10 + c - 48, c = GetChar()); ^ user.cpp: In function ‘char GetChar()’: user.cpp:68:41: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, kBuffSize, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:93:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("figuri.in", "r", stdin); ^ user.cpp:94:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("figuri.out", "w", stdout); ^