Compilare: main.cpp:2:81: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 2 | using namespace std;ifstream f("rmq.in");ofstream g("rmq.out");int a[17][1<<17];main(){int n,q,i=1,j=1,k,l,r;f>>n>>q;for(;i<=n;i++)f>>a[0][i];for(;j<17;j++)for(i=1;i<n;i++)a[j][i]=min(a[j-1][i],a[j-1][i+(1<<(j-1))]);while (q--){f>>l>>r;k=__lg(r-l+1);g<<min(a[k][l],a[k][r-(1<<k)+1])<<'\n';}} | ^~~~