oj.uz

Submission #86284

# Submission time Handle Problem Language Result Execution time Memory
86284 2018-11-25T21:52:55 Z nikolapesic2802 Zagrade (COI17_zagrade) C++14
40 / 100
 3000 ms 162036 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;
        int c=0;
        while(set1.size()&&(*set1.begin()).first+delta<0){
            assert((*set1.begin()).first+delta==-1);
            obr=((*set1.begin()).second);
            set1.erase(set1.begin());
            assert(c==0);
            c++;
        }
        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:252:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i",&n);
     ~~~~~^~~~~~~~~
zagrade.cpp:262:14: 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 10 ms 7544 KB Output is correct
2 Correct 10 ms 7544 KB Output is correct
3 Correct 10 ms 7592 KB Output is correct
4 Correct 10 ms 7604 KB Output is correct
5 Correct 10 ms 7804 KB Output is correct
6 Correct 10 ms 7804 KB Output is correct
7 Correct 10 ms 7904 KB Output is correct
8 Correct 10 ms 7904 KB Output is correct
9 Correct 14 ms 7960 KB Output is correct
10 Correct 9 ms 8016 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 357 ms 159604 KB Output is correct
2 Correct 417 ms 159716 KB Output is correct
3 Correct 331 ms 159716 KB Output is correct
4 Correct 423 ms 159716 KB Output is correct
5 Correct 340 ms 159860 KB Output is correct
6 Correct 389 ms 159860 KB Output is correct
7 Correct 335 ms 159860 KB Output is correct
8 Correct 401 ms 159860 KB Output is correct
9 Correct 369 ms 159860 KB Output is correct
10 Correct 377 ms 162036 KB Output is correct
11 Correct 329 ms 162036 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7544 KB Output is correct
2 Correct 10 ms 7544 KB Output is correct
3 Correct 10 ms 7592 KB Output is correct
4 Correct 10 ms 7604 KB Output is correct
5 Correct 10 ms 7804 KB Output is correct
6 Correct 10 ms 7804 KB Output is correct
7 Correct 10 ms 7904 KB Output is correct
8 Correct 10 ms 7904 KB Output is correct
9 Correct 14 ms 7960 KB Output is correct
10 Correct 9 ms 8016 KB Output is correct
11 Correct 357 ms 159604 KB Output is correct
12 Correct 417 ms 159716 KB Output is correct
13 Correct 331 ms 159716 KB Output is correct
14 Correct 423 ms 159716 KB Output is correct
15 Correct 340 ms 159860 KB Output is correct
16 Correct 389 ms 159860 KB Output is correct
17 Correct 335 ms 159860 KB Output is correct
18 Correct 401 ms 159860 KB Output is correct
19 Correct 369 ms 159860 KB Output is correct
20 Correct 377 ms 162036 KB Output is correct
21 Correct 329 ms 162036 KB Output is correct
22 Correct 1159 ms 162036 KB Output is correct
23 Correct 1104 ms 162036 KB Output is correct
24 Correct 1221 ms 162036 KB Output is correct
25 Correct 1128 ms 162036 KB Output is correct
26 Execution timed out 3072 ms 162036 KB Time limit exceeded
27 Halted 0 ms 0 KB -