Compilare: main.cpp:2:151: 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,v[1<<17],k[1<<17],a[1<<17];void p(int i){while(a[--i]-r);if(--r)p(i);g<<v[i]<<" ";}main(){f>>n;while(f>>v[++i]){n=0;while(++n<=r&&k[n]<v[i]);r+=n>r;k[a[i]=n]=v[i];}g<<r<<" ",p(i);} | ^~~~