Submission #653177

#	Time	Username	Problem	Language	Result	Execution time	Memory
653177		guagua0407	Zoltan (COCI16_zoltan)	C++17	0 / 140	199 ms	33896 KiB

zoltan

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void setIO(string s) {
	freopen((s + ".in").c_str(), "r", stdin);
	freopen((s + ".out").c_str(), "w", stdout);
}

const ll mxn=2e5+5;
const ll mod=1e9+7;
ll arr[mxn];
ll id[mxn];
map<ll,ll> num;
ll MX=0;
pair<ll,ll> segtree[mxn][2];

ll fpow(ll a,ll b){
	ll ans=1;
	while(b>0){
		if(b&1) ans=(ans*a)%mod;
		a=(a*a)%mod;
		b/=2;
	}
	return ans;
}

pair<ll,ll> comb(pair<ll,ll> a,pair<ll,ll> b){
	if(a.f==b.f){
		return {a.f,a.s+b.s};
	}
	return max(a,b);
}

void update(ll pos,pair<ll,ll> val,ll k,ll l=1,ll r=MX,ll v=1){
	if(l==r){
		segtree[v][k]=comb(segtree[v][k],val);
		return;
	}
	ll mid=(l+r)/2;
	if(pos<=mid) update(pos,val,k,l,mid,v*2);
	else update(pos,val,k,mid+1,r,v*2+1);
	segtree[v][k]=comb(segtree[v*2][k],segtree[v*2+1][k]);
}

pair<ll,ll> query(ll tl,ll tr,ll k,ll l=1,ll r=MX,ll v=1){
	if(tl>tr){
		return {0,1};
	}
	else if(tl<=l and r<=tr){
		return segtree[v][k];
	}
	ll mid=(l+r)/2;
	return comb(query(tl,min(mid,tr),k,l,mid,v*2),query(max(tl,mid+1),tr,k,mid+1,r,v*2+1));
}


int main() {_
	//setIO("wayne");
    ll n;
	cin>>n;
	for(ll i=1;i<=n;i++){
		cin>>arr[i];
		num[arr[i]]++;
	}
	for(auto &v:num){
		MX++;
		v.s=MX;
	}
	for(ll i=1;i<=n;i++){
		id[i]=num[arr[i]];
	}
	for(ll i=n;i>=1;i--){
		pair<ll,ll> tmp=query(id[i]+1,MX,0);
		update(id[i],{tmp.f+1,tmp.s},0);
	}
	for(ll i=n;i>=1;i--){
		pair<ll,ll> tmp=query(1,id[i]-1,1);
		update(id[i],{tmp.f+1,tmp.s},1);
	}
	pair<ll,ll> best={0,0};
	for(ll i=1;i<=n;i++){
		best=comb(best,{(query(id[i],id[i],1).f+query(id[i]+1,MX,0).f)%mod,(query(id[i],id[i],1).s*query(id[i]+1,MX,0).s)%mod});
		//cout<<best.f<<' '<<best.s<<'\n';
	}
	cout<<best.f<<' '<<best.s*fpow(2,n-best.f)/2;
	return 0;
}
//maybe its multiset not set

Compilation message (stderr)

zoltan.cpp: In function 'void setIO(std::string)':
zoltan.cpp:10:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |  freopen((s + ".in").c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
zoltan.cpp:11:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  freopen((s + ".out").c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 140