Compilare: user.cpp: In function ‘int main()’: user.cpp:84:17: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (((x3!=-1) && (b[x3][y3].s<b[x2][y2+1].s) || (x3==-1)) && b[x2][y2+1].s<b[x2][y2].s && !viz[x2][y2+1]){ ^ user.cpp:87:17: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (((x3!=-1) && (b[x3][y3].s<b[x2+1][y2].s) || (x3==-1)) && b[x2+1][y2].s<b[x2][y2].s && !viz[x2+1][y2]) { ^ user.cpp:90:18: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if ((((x3!=-1) && (b[x3][y3].s<b[x2][y2-1].s) || (x3!=-1) && (b[x3][y3].s==0 && b[x2][y2-1].s==0)) || (x3==-1)) && b[x2][y2-1].s<b[x2][y2].s && !viz[x2][y2-1]) { ^ user.cpp:77:8: warning: unused variable ‘v’ [-Wunused-variable] bool v=0; ^ user.cpp:95:16: warning: ‘y3’ may be used uninitialized in this function [-Wmaybe-uninitialized] viz[x3][y3]=1; ^