Compilare: user.cpp: In function ‘void BFS(std::pair<short int, short int>)’: user.cpp:41:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(I > 0 & I <= L & J >= 0 & J < C & ^ user.cpp:41:35: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(I > 0 & I <= L & J >= 0 & J < C & ^ user.cpp:41:44: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(I > 0 & I <= L & J >= 0 & J < C & ^ user.cpp:42:28: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] paper[I][J] == color & !visited[I][J]) ^ user.cpp: In function ‘int main()’: user.cpp:56:37: 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:57:39: 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); ^ user.cpp:61:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd %hd %hd", &C, &L, &shapes); ^ user.cpp:65:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd %hd %hd %hd %hd", &x1, &y1, &x2, &y2, &color); ^