Compilare: main.cpp:2:95: 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],n,q,i,j,k,l,r;main(){f>>n>>q;for(;i<n;i++)f>>a[0][i];while(j++<16)for(i=0;i<n;i++)a[j][i]=min(a[j-1][i],a[j-1][i+(1<<j-1)]);for(;f>>l>>r;k=__lg(r-l+1),g<<min(a[k][l-1],a[k][r-(1<<k)])<<'\n');} | ^~~~ main.cpp: In function 'int main()': main.cpp:2:199: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] 2 | using namespace std;ifstream f("rmq.in");ofstream g("rmq.out");int a[17][1<<17],n,q,i,j,k,l,r;main(){f>>n>>q;for(;i<n;i++)f>>a[0][i];while(j++<16)for(i=0;i<n;i++)a[j][i]=min(a[j-1][i],a[j-1][i+(1<<j-1)]);for(;f>>l>>r;k=__lg(r-l+1),g<<min(a[k][l-1],a[k][r-(1<<k)])<<'\n');} | ~^~