oj.uz

Submission #125085

# Submission time Handle Problem Language Result Execution time Memory
125085 2019-07-04T14:58:50 Z hugo_pm Long Mansion (JOI17_long_mansion) C++17
25 / 100
 3000 ms 85316 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define form2(i, a, b) for (int i = (a); i < (b); ++i)
#define ford2(i, a, b) for (int i = (a-1); i >= (b); --i)
#define form(i, n) form2(i, 0, n)
#define ford(i, n) ford2(i, n, 0)
 
#define chmax(x, v) x = max(x, (v))
#define chmin(x, v) x = min(x, (v))
#define fi first
#define se second
 
const long long BIG = 1000000000000000000LL;
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
 
void solve();
signed main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	solve();
	return 0;
}
 
 
// Version classique du segment tree
// Opérations en O(log N)
// Indices 0-indexés
 
class SegtreeClassic
{
    public:
        void init(vector<int> tab);
        int requete(int gauche, int droite);
        void modifier(int index, int val);
 
    private:
        const int UNDEF = 1e9 + 171;
        int nbElements;
        int combiner(int a, int b);
        vector<int> interne;
};
 
void SegtreeClassic::init(vector<int> tab)
{
    nbElements = tab.size();
    interne.resize(2 * nbElements);
 
    for (int ind = 0; ind < nbElements; ++ind)
        interne[ind + nbElements] = tab[ind];
 
    for (int ind = nbElements - 1; ind >= 0; --ind)
        interne[ind] = combiner(interne[2*ind], interne[2*ind + 1]);
}
 
int SegtreeClassic::requete(int gauche, int droite)
{
    int res = UNDEF;
    ++droite; // Pour passer à un intervalle semi-ouvert [l ; r[
    gauche += nbElements;
    droite += nbElements;
 
    while (gauche < droite)
    {
        // Si gauche est impair, le noeud est inclus mais pas le parent
        // On ajoute donc ce noeud et on passera plus tard au noeud à droite du parent
        if (gauche & 1)
            res = combiner(res, interne[gauche++]);
        // Même raisonnement sachant que droite est exclus, d'où la {pré}-décrémentation
        if (droite & 1)
            res = combiner(res, interne[--droite]);
        
        gauche /= 2;
        droite /= 2;
    }
 
    return res;
}
 
void SegtreeClassic::modifier(int index, int val)
{
    index += nbElements;
    interne[index] = val;
    index /= 2;
    while (index > 0)
    {
        interne[index] = combiner(interne[2*index], interne[2*index+1]);
        index /= 2;
    }
}
 
int SegtreeClassic::combiner(int a, int b)
{
    if (a == UNDEF) return b;
    if (b == UNDEF) return a;
    return min(a, b);
}
 
 
 
const int borne = 501*1000;
int nbElem, nbReq;
int reqKey[borne];
int conLeft[borne], conRight[borne];
vector<int> keyPos[borne];
vector<int> iniTab[borne];
 
int lastLigneDroite[borne];
int li[borne], ri[borne];
 
void solve()
{
	cin >> nbElem;
	form(i, nbElem-1) { cin >> reqKey[i]; }
	form(iPos, nbElem) {
		int nbKeys; cin >> nbKeys;
		form(iRcp, nbKeys) {
			int keyId; cin >> keyId;
			keyPos[keyId].push_back(iPos);
			iniTab[iPos].push_back(keyId);
		}
	}
 
	conLeft[0] = BIG;
	conRight[nbElem-1] = -BIG;
 
	form(iElem, nbElem) {
		if (iElem > 0) {
			int keyToLeft = reqKey[iElem-1];
			auto &listePos = keyPos[keyToLeft];
			
			auto it = lower_bound(listePos.begin(), listePos.end(), iElem);
			if (listePos.empty() || it == listePos.end()) {
				conLeft[iElem] = BIG;
			} else {
				conLeft[iElem] = *it;
			}
		}
 
		if (iElem+1 < nbElem) {
			int keyToRight = reqKey[iElem];
			auto &listePos = keyPos[keyToRight];
 
			auto it = upper_bound(listePos.begin(), listePos.end(), iElem);
			if (listePos.empty() || it == listePos.begin()) {
				conRight[iElem] = -BIG;
			} else {
				--it;
				conRight[iElem] = *it;
			}
		}
	}
 
 
	vector<int> lstPos(borne, nbElem-1);
	SegtreeClassic sc; sc.init(lstPos);
 
	ford(iElem, nbElem) {
 
		if (conRight[iElem] >= 0) sc.modifier(conRight[iElem]+1, iElem);
		else sc.modifier(0, iElem);
 
		lastLigneDroite[iElem] = sc.requete(0, iElem); // TODO A VERIFIER
	}
 
	li[0] = 0; ri[0] = lastLigneDroite[0];
	form2(iElem, 1, nbElem) {
		li[iElem] = iElem;
		ri[iElem] = lastLigneDroite[iElem];
		if (conLeft[iElem] <= ri[iElem]) {
			li[iElem] = li[iElem-1];
			chmax(ri[iElem], ri[iElem-1]);
		}
		while (true) {
			if (conLeft[li[iElem]] <= ri[iElem]) {
				--li[iElem];
				chmin(li[iElem], li[li[iElem]]);
				chmax(ri[iElem], ri[li[iElem]]);
			}
			else if (conRight[ri[iElem]] >= li[iElem]) {
				++ri[iElem];
			}
			else break;
		}
	}
 

	cin >> nbReq;
	form(iReq, nbReq) {
		int x, y; cin >> x >> y;
		--x; --y;
		if (li[x] <= y && y <= ri[x]) {
			cout << "YES\n";
		} else {
			cout << "NO\n";
		}
	}
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 39928 KB Output is correct
2 Correct 42 ms 39928 KB Output is correct
3 Correct 43 ms 39928 KB Output is correct
4 Correct 41 ms 39800 KB Output is correct
5 Correct 41 ms 39800 KB Output is correct
6 Correct 41 ms 39800 KB Output is correct
7 Correct 41 ms 39800 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 39928 KB Output is correct
2 Correct 42 ms 39928 KB Output is correct
3 Correct 43 ms 39928 KB Output is correct
4 Correct 41 ms 39800 KB Output is correct
5 Correct 41 ms 39800 KB Output is correct
6 Correct 41 ms 39800 KB Output is correct
7 Correct 41 ms 39800 KB Output is correct
8 Correct 154 ms 39928 KB Output is correct
9 Correct 153 ms 39928 KB Output is correct
10 Correct 158 ms 39972 KB Output is correct
11 Correct 156 ms 40056 KB Output is correct
12 Correct 141 ms 39740 KB Output is correct
13 Correct 150 ms 39800 KB Output is correct
14 Correct 150 ms 39800 KB Output is correct
15 Correct 165 ms 39928 KB Output is correct
16 Correct 148 ms 39800 KB Output is correct
17 Correct 150 ms 39800 KB Output is correct
18 Correct 151 ms 39800 KB Output is correct
19 Correct 149 ms 39928 KB Output is correct
20 Correct 158 ms 39928 KB Output is correct
21 Correct 153 ms 39800 KB Output is correct
22 Correct 151 ms 39928 KB Output is correct
23 Correct 153 ms 39928 KB Output is correct
24 Correct 152 ms 39928 KB Output is correct
25 Correct 151 ms 39928 KB Output is correct
26 Correct 153 ms 39928 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 521 ms 51772 KB Output is correct
2 Correct 683 ms 53288 KB Output is correct
3 Correct 755 ms 55012 KB Output is correct
4 Correct 607 ms 55504 KB Output is correct
5 Correct 672 ms 55452 KB Output is correct
6 Correct 438 ms 51364 KB Output is correct
7 Correct 259 ms 51684 KB Output is correct
8 Correct 312 ms 51368 KB Output is correct
9 Correct 252 ms 51344 KB Output is correct
10 Correct 255 ms 51164 KB Output is correct
11 Correct 251 ms 51112 KB Output is correct

Subtask #4
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 39928 KB Output is correct
2 Correct 42 ms 39928 KB Output is correct
3 Correct 43 ms 39928 KB Output is correct
4 Correct 41 ms 39800 KB Output is correct
5 Correct 41 ms 39800 KB Output is correct
6 Correct 41 ms 39800 KB Output is correct
7 Correct 41 ms 39800 KB Output is correct
8 Correct 154 ms 39928 KB Output is correct
9 Correct 153 ms 39928 KB Output is correct
10 Correct 158 ms 39972 KB Output is correct
11 Correct 156 ms 40056 KB Output is correct
12 Correct 141 ms 39740 KB Output is correct
13 Correct 150 ms 39800 KB Output is correct
14 Correct 150 ms 39800 KB Output is correct
15 Correct 165 ms 39928 KB Output is correct
16 Correct 148 ms 39800 KB Output is correct
17 Correct 150 ms 39800 KB Output is correct
18 Correct 151 ms 39800 KB Output is correct
19 Correct 149 ms 39928 KB Output is correct
20 Correct 158 ms 39928 KB Output is correct
21 Correct 153 ms 39800 KB Output is correct
22 Correct 151 ms 39928 KB Output is correct
23 Correct 153 ms 39928 KB Output is correct
24 Correct 152 ms 39928 KB Output is correct
25 Correct 151 ms 39928 KB Output is correct
26 Correct 153 ms 39928 KB Output is correct
27 Correct 521 ms 51772 KB Output is correct
28 Correct 683 ms 53288 KB Output is correct
29 Correct 755 ms 55012 KB Output is correct
30 Correct 607 ms 55504 KB Output is correct
31 Correct 672 ms 55452 KB Output is correct
32 Correct 438 ms 51364 KB Output is correct
33 Correct 259 ms 51684 KB Output is correct
34 Correct 312 ms 51368 KB Output is correct
35 Correct 252 ms 51344 KB Output is correct
36 Correct 255 ms 51164 KB Output is correct
37 Correct 251 ms 51112 KB Output is correct
38 Correct 580 ms 77752 KB Output is correct
39 Correct 602 ms 85316 KB Output is correct
40 Correct 487 ms 70708 KB Output is correct
41 Execution timed out 3061 ms 75268 KB Time limit exceeded
42 Halted 0 ms 0 KB -