Compilare: user.cpp: In function ‘int main()’: user.cpp:42:57: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(a[i][j]==0 || a[i][j]>a[i][k]+a[k][j] && j!=k && viz[j]==0) ^ user.cpp:17:38: warning: unused variable ‘ok’ [-Wunused-variable] int n,m,x,y,c,i,j,k,l,poz1=0,poz2=0,ok=1,ok2=0,min,max; ^