oj.uz

Submission #86283

# Submission time Handle Problem Language Result Execution time Memory
86283 2018-11-25T21:49:11 Z nikolapesic2802 Zagrade (COI17_zagrade) C++14
40 / 100
 3000 ms 161684 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>

#define ll long long
#define pb push_back
#define sz(x) (int)(x).size()
#define mp make_pair
#define all(x) x.begin(), x.end()

using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;

template<class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>; ///find_by_order(),order_of_key()
template<class T1, class T2> ostream& operator<<(ostream& os, const pair<T1,T2>& a) { os << '{' << a.f << ", " << a.s << '}'; return os; }
template<class T> ostream& operator<<(ostream& os, const vector<T>& a) {
	os << '{';
	for(int i=0;i<sz(a);i++)
	{
		if(i>0&&i<sz(a)-1)
			os << ", ";
		os << a[i];
	}
	os << '}';
    return os;
}
const int N=3e5+5;
ll cnt=0;
int sta[N];
int sz[N];
vector<vector<int> > graf(N);
void dfs(int tr,int par)
{
    sz[tr]=1;
    for(auto p:graf[tr])
    {
        if(p==par)
            continue;
        dfs(p,tr);
        sz[tr]+=sz[p];
    }
}
struct str{
    set<pair<int,int> > set1;
    int delta;
    void insert(int i,int p=1)
    {
        i-=delta;
        if(set1.lower_bound({i,0})==set1.end())
        {
            set1.insert({i,p});
            return;
        }
        pair<int,int> a=*set1.lower_bound({i,0});
        if(a.first==i)
        {
            set1.erase(a);
            a.second+=p;
            set1.insert(a);
        }
        else
        {
            set1.insert({i,p});
        }
    }
    int count(int i)
    {
        i-=delta;
        if(set1.lower_bound({i,0})==set1.end())
            return 0;
        pair<int,int> a=*set1.lower_bound({i,0});
        if(a.first==i)
            return a.second;
        return 0;
    }
    int size()
    {
        return set1.size();
    }
    void erase(int i)
    {
        i-=delta;
        pair<int,int> a=*set1.lower_bound({i,0});
        if(a.first==i)
        {
            set1.erase(a);
            a.second--;
            if(a.second>0)
                set1.insert(a);
        }
        else
        {
            assert(0);
        }
    }
    int erase()
    {
        int obr=0;
        while(set1.size()&&(*set1.begin()).first+delta<0){
            assert((*set1.begin()).first+delta==-1);
            obr=((*set1.begin()).second);
            set1.erase(set1.begin());
        }
        return obr;
    }
    vector<int> all_elements()
    {
        vector<int> al;
        for(auto p:set1)
        {
            for(int i=0;i<p.second;i++)
                al.pb(p.first+delta);
        }
        return al;
    }
} e;
vector<str> pocetak,kraj;
str poc,krj;
pair<int,int> solve(int tr,int par)
{
    //printf("%i %i\n",tr,par);

    //printf("%i: %lld\n",tr,cnt);
    if(graf[tr].size()==1&&tr!=0)
    {
        //printf("Usao!\n");
        if(sta[tr]==0)
            cnt+=krj.count(1);
        else
            cnt+=poc.count(1);
        pocetak.pb(e);
        kraj.pb(e);
        if(sta[tr]==0)
            pocetak.back().insert(1);
        else
            kraj.back().insert(1);
        return mp(pocetak.size()-1,kraj.size()-1);
    }
    int obr;
    if(sta[tr]==0)
    {
        cnt+=krj.count(1);
        poc.delta++;
        krj.delta--;
        obr=krj.erase();
    }
    else
    {
        cnt+=poc.count(1);
        poc.delta--;
        krj.delta++;
        obr=poc.erase();
    }
    //printf("Prosao!\n");
    vector<pair<int,int> > ind;
    for(auto p:graf[tr])
    {
        if(p==par)
            continue;
        ind.pb({sz[p],p});
    }
    sort(ind.begin(),ind.end());
    vector<int> dodao,dodaok;
    for(int i=0;i<(int)ind.size()-1;i++)
    {
        pair<int,int> tren=solve(ind[i].second,tr);
        //printf("%i: %i %i %i\n",tr,tren.first,tren.second,ind.size());
        if(sta[tr]==0)
        {
            cnt+=kraj[tren.second].count(1);
            pocetak[tren.first].delta++;
            kraj[tren.second].delta--;
            kraj[tren.second].erase();
        }
        else
        {
            cnt+=pocetak[tren.first].count(1);
            pocetak[tren.first].delta--;
            kraj[tren.second].delta++;
            pocetak[tren.first].erase();
        }
        vector<int> al=pocetak[tren.first].all_elements();
        for(auto p:al)
        {
            //printf("%i: Dodao: %i\n",tr,p);
            dodao.pb(p);
            poc.insert(p);
        }
        al=kraj[tren.second].all_elements();
        for(auto p:al)
        {
            //printf("%i: Dodaokraj: %i\n",tr,p);
            dodaok.pb(p);
            krj.insert(p);
        }
    }
    pair<int,int> tren=solve(ind[ind.size()-1].second,tr);
    if(sta[tr]==0)
    {
        cnt+=kraj[tren.second].count(1);
        pocetak[tren.first].delta++;
        kraj[tren.second].delta--;
        kraj[tren.second].erase();
        pocetak[tren.first].insert(1);
    }
    else
    {
        cnt+=pocetak[tren.first].count(1);
        pocetak[tren.first].delta--;
        kraj[tren.second].delta++;
        pocetak[tren.first].erase();
        kraj[tren.second].insert(1);
    }
    for(auto p:dodao)
    {
        //printf("%i: brisem %i\n",tr,p);
        poc.erase(p);
        pocetak[tren.first].insert(p);
    }
    for(auto p:dodaok)
    {
        //printf("%i: brisem kraj %i\n",tr,p);
        krj.erase(p);
        kraj[tren.second].insert(p);
    }
    if(sta[tr]==0)
    {
        if(obr)
            krj.insert(-1,obr);
        poc.delta--;
        krj.delta++;
    }
    else
    {
        if(obr)
            poc.insert(-1,obr);
        poc.delta++;
        krj.delta--;
    }
    return tren;
}
int main()
{
    e.set1.clear();
    e.delta=0;
    int n;
    scanf("%i",&n);
    string s;
    cin >> s;
    for(int i=0;i<n;i++)
    {
        sta[i]=s[i]==')';
    }
    for(int i=1;i<n;i++)
    {
        int x,y;
        scanf("%i %i",&x,&y);
        x--;
        y--;
        graf[x].pb(y);
        graf[y].pb(x);
    }
    solve(0,-1);
    printf("%lld\n",cnt);
    return 0;
}

Compilation message

zagrade.cpp: In function 'int main()':
zagrade.cpp:249:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i",&n);
     ~~~~~^~~~~~~~~
zagrade.cpp:259:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i %i",&x,&y);
         ~~~~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 7544 KB Output is correct
2 Correct 12 ms 7544 KB Output is correct
3 Correct 11 ms 7616 KB Output is correct
4 Correct 11 ms 7820 KB Output is correct
5 Correct 11 ms 7820 KB Output is correct
6 Correct 11 ms 7820 KB Output is correct
7 Correct 11 ms 7820 KB Output is correct
8 Correct 13 ms 7896 KB Output is correct
9 Correct 11 ms 7896 KB Output is correct
10 Correct 9 ms 7928 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 346 ms 159380 KB Output is correct
2 Correct 422 ms 159508 KB Output is correct
3 Correct 376 ms 159560 KB Output is correct
4 Correct 429 ms 159560 KB Output is correct
5 Correct 383 ms 159560 KB Output is correct
6 Correct 391 ms 159560 KB Output is correct
7 Correct 341 ms 159560 KB Output is correct
8 Correct 409 ms 159560 KB Output is correct
9 Correct 353 ms 159560 KB Output is correct
10 Correct 388 ms 161684 KB Output is correct
11 Correct 317 ms 161684 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 7544 KB Output is correct
2 Correct 12 ms 7544 KB Output is correct
3 Correct 11 ms 7616 KB Output is correct
4 Correct 11 ms 7820 KB Output is correct
5 Correct 11 ms 7820 KB Output is correct
6 Correct 11 ms 7820 KB Output is correct
7 Correct 11 ms 7820 KB Output is correct
8 Correct 13 ms 7896 KB Output is correct
9 Correct 11 ms 7896 KB Output is correct
10 Correct 9 ms 7928 KB Output is correct
11 Correct 346 ms 159380 KB Output is correct
12 Correct 422 ms 159508 KB Output is correct
13 Correct 376 ms 159560 KB Output is correct
14 Correct 429 ms 159560 KB Output is correct
15 Correct 383 ms 159560 KB Output is correct
16 Correct 391 ms 159560 KB Output is correct
17 Correct 341 ms 159560 KB Output is correct
18 Correct 409 ms 159560 KB Output is correct
19 Correct 353 ms 159560 KB Output is correct
20 Correct 388 ms 161684 KB Output is correct
21 Correct 317 ms 161684 KB Output is correct
22 Correct 1130 ms 161684 KB Output is correct
23 Correct 1093 ms 161684 KB Output is correct
24 Correct 1127 ms 161684 KB Output is correct
25 Correct 1152 ms 161684 KB Output is correct
26 Execution timed out 3062 ms 161684 KB Time limit exceeded
27 Halted 0 ms 0 KB -