Compilare: user.cpp: In function ‘int main()’: user.cpp:36:48: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] sz = std::max(dig[i & 1][x], dig[1 - i & 1][j]); ^ user.cpp:39:48: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] t = t + dp[i & 1][x][k] + dp[1 - i & 1][j][k]; ^ user.cpp:46:48: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] sz = std::max(dig[i & 1][j], dig[1 - i & 1][j]); ^ user.cpp:49:30: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] t = t + dp[1 - i & 1][j][k] + dp[i & 1][j][k]; ^