Compilare: main.cpp:2:164: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 2 | std::ifstream f("scmax.in");std::ofstream g("scmax.out");int n,r,i,s,d,m,v[1<<17],k[1<<17],a[1<<17];void p(){if(r){int n;while(a[n=--i]!=r);r--;p();g<<v[n]<<" ";}}main(){for(f>>n,i=1;i<=n;d=i++){f>>v[i],s=0,k[i]=2e9;while(s<=d)if(k[m=(s+d)/2]<=v[i])s=m+1;else d=m-1;if(k[d]<v[i])k[a[i]=s]=v[i],r=s>r?s:r;}g<<r<<" ",p();} | ^~~~