Compilare: main.cpp: In function 'int main()': main.cpp:50:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(i<n && b[i]!=a[j]) ^ main.cpp:42:44: warning: unused variable 'k' [-Wunused-variable] int i=0,j=0,n=b.size(),m=a.size(),nr=0,k; ^