Submission #445506

#	Time	Username	Problem	Language	Result	Execution time	Memory
445506		keta_tsimakuridze	Zoltan (COCI16_zoltan)	C++14	49 / 140	564 ms	23336 KiB

zoltan

#include<bits/stdc++.h>
#define f first
#define s second
#define pii pair<int,int>
using namespace std;
const int N=2e5+5,mod=1e9+7;
int t,a[N],b[N],n,pwr[N];
pair<int,int> tree[4*N][2],l[N][2];
map<int,int> ind;
void upd(pii &a,pii b){
	if(a.f == b.f) {
		a.s = (a.s + b.s)%mod;
	}
	else if(a.f < b.f) {
		a.s = b.s;
		a.f = b.f;
	}
}
void update(int u,int ind,int l,int r,int val1,int val2,int t) {
	if(l>ind || r<ind) return;
	if(l==r) {
		upd(tree[u][t],{val1,val2});
		return;
	}
	int mid = (l+r)/2;
	update(2*u,ind,l,mid,val1,val2,t);
	update(2*u+1,ind,mid+1,r,val1,val2,t);
	tree[u][t] = {0,0};
	upd(tree[u][t],tree[2*u][t]);
	upd(tree[u][t],tree[2*u+1][t]);
}
pii getans(int u,int start,int end,int l,int r,int t) {
	if(l > end || r<start) return {0,0};
	if(start<=l && r<=end) return tree[u][t];
	int mid = (l+r)/2;
	pii g1 = getans(2*u,start,end,l,mid,t);
	pii g2 = getans(2*u+1,start,end,mid+1,r,t);
	upd(g1,g2);
	return g1;
}
 main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		b[i] = a[i];
	}
	sort(b+1,b+n+1);
	int idx = 0;
	b[0] = -1;
	pwr[0] = 1;
	for(int i=1;i<=n;i++){
		pwr[i] = pwr[i-1] * 2 % mod;
		if(b[i]!=b[i-1]) idx++;
		ind[b[i]] = idx;
	}
	for(int i=n;i>=2;i--){
		a[i] = ind[a[i]];
		pii p = getans(1,1,a[i]-1,1,n,1);
		p.f++;
		if(p.f == 1) p.s = 1;
		upd(l[a[i]][1],p);
		update(1,a[i],1,n,p.f,p.s,1);
		
			 p = getans(1,a[i]+1,n,1,n,0);
			p.f++;
			if(p.f == 1) p.s = 1;
			update(1,a[i],1,n,p.f,p.s,0);
			upd(l[a[i]][0],p);
		
	}
	l[0][1] = {0,1};
	l[idx+1][0] = {0,1}; 
	pii ans;
	ans = {0,0};
	for(int i=idx;i>=0;i--){
		upd(l[i][0],l[i+1][0]);
	}
	for(int i=0;i<=idx;i++) {
		if(i)upd(l[i][1],l[i-1][1]);
		upd(ans,{l[i][1].f + l[i+1][0].f,(long long) l[i][1].s * l[i+1][0].s %mod* pwr[n -l[i][1].f - l[i+1][0].f - 1]%mod});
	}
	// 
	a[1] = ind[a[1]];
	pii p = getans(1,a[1]+1,n,1,n,0);
	p.f++;
	if(p.f==1) p.s = 1;
	for(int i=0; i<a[1]; i++) {
		upd(ans,{l[i][1].f + p.f,(long long) l[i][1].s * p.s %mod* pwr[n -l[i][1].f - p.f]%mod});
		
	}

	cout<<ans.f<<" "<<ans.s;
	
}

Compilation message (stderr)

zoltan.cpp:41:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   41 |  main(){
      |  ^~~~

• Subtask 1: 49 / 140