Compilare: user.cpp: In function ‘int main()’: user.cpp:18:66: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(a[i-1][j]!=0&&a[i-1][j]!=a[i][j]&&a[i][j+1]==a[i-1][j]&&a[i-1][j+1]==k||a[i+1][j]!=0&&a[i+1][j]!=a[i][j]&&a[i][j+1]==a[i+1][j]&&a[i+1][j+1]==k) {ap[k]++; ap[a[i][j+1]]++;} ^