Compilare: user.cpp: In function ‘int main()’: user.cpp:23:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[k1][k2]!=i) ^ user.cpp:31:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[k1][k2]!=i) ^ user.cpp:40:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[k1][k2]!=i) ^ user.cpp:48:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[k1][k2]!=i) ^ user.cpp:12:28: warning: unused variable ‘w’ [-Wunused-variable] int n,m,k,l,i,pp,k1,k2,w=0; ^