Compilare: user.cpp: In function ‘int main()’: user.cpp:2:189: warning: second operand of conditional expression has no effect [-Wunused-value] using namespace std;int t,n,s,a,x,i;int main(){ifstream f("xerox.in");ofstream g("xerox.out");f>>t;while(t--){s=0;f>>n>>x>>x;while(n--){f>>a;s^=a;for(i=0;i<a;++i) f>>x>>x;}g<<s ? 1:0<<'\n';}} ^ user.cpp:2:189: warning: third operand of conditional expression has no effect [-Wunused-value]