Compilare: main.cpp: In function 'int main()': main.cpp:2:135: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses] using namespace std;ifstream r("suma3.in");ofstream w("suma3.out");int d[2],n,i,x;int main(){r>>n;for(i=0;i<n;i++){r>>x;d[i&1]=max(d[1-i&1],x+d[i&1]);}w<<d[(n-1)&1];} ~^~