Compilare: main.cpp: In function 'int main()': main.cpp:37:27: warning: comparison of constant '-1' with boolean expression is always false [-Wbool-compare] while(p[i][j]==k[i][j]==-1) ~~~~~~~~~~~~~~~~^~~~ main.cpp:37:18: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses] while(p[i][j]==k[i][j]==-1) ~~~~~~~^~~~~~~~~ main.cpp:45:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses] while(p[i][j]==x && k[i][j]==y || p[i][j]==y && k[i][j]==x) ~~~~~~~~~~~^~~~~~~~~~~~~