Compilare: user.cpp: In function ‘int main()’: user.cpp:2:150: warning: second operand of conditional expression has no effect [-Wunused-value] using namespace std;ifstream f("nim.in");ofstream g("nim.out");int n,t,s,x;int main(){f>>t;while(t--){f>>n;s=0;while(n--)f>>x,s^=x;g<<s?"DA\n":"NU\n";}} ^ user.cpp:2:150: warning: third operand of conditional expression has no effect [-Wunused-value]