Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:78: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] std::ifstream r("suma2.in");std::ofstream w("suma2.out");int d[2],c,n,x;main(){r>>n;while(n--){r>>x;c^=1;d[c]=std::max(d[c^1],x+d[c]);}w<<d[c];} ^