oj.uz

Submission #98113

# Submission time Handle Problem Language Result Execution time Memory
98113 2019-02-20T18:29:48 Z silxikys Long Mansion (JOI17_long_mansion) C++14
10 / 100
 3000 ms 96800 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const int maxn = 500005;
int N, Q;
int C[maxn];
set<int> keys[maxn];
int furthest[maxn]; //furthest right index just by going right

struct Query {
    int st, en, id;
};
vector<Query> queries[maxn]; //queries that start at queries[i]

void expand(int &li, int &ri, set<int> &se) {
    while (true) {
        if (li > 1 && se.count(C[li-1])) {
            --li;
            for (int a: keys[li]) se.insert(a);
        }
        else if (ri < N && se.count(C[ri])) {
            ++ri;
            for (int a: keys[ri]) se.insert(a);
        }
        else break;
    }
}

int li[maxn], ri[maxn];
set<int>* currkeys[maxn];

vector<int> pos[maxn]; //list of posititions for keys


int main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    cin >> N;
    for (int i = 1; i <= N - 1; i++) {
        cin >> C[i];
    }
    for (int i = 1; i <= N; i++) {
        int k; cin >> k;
        for (int j = 0; j < k; j++) {
            int key; cin >> key;
            keys[i].insert(key);
            pos[key].push_back(i);
        }
    }
    //precalc
    furthest[N] = N;
    for (int i = N-1; i >= 1; i--) {
        furthest[i] = keys[i].count(C[i]) ? furthest[i+1] : i;
    }
    cin >> Q;
    for (int i = 0; i < Q; i++) {
        int x, y; cin >> x >> y;
        queries[x].push_back({x,y,i});        
    }
    vector<string> ans(Q);
    for (int i = 1; i <= N; i++) {
        li[i] = ri[i] = i;
        if (keys[i].count(C[i-1])) {
            if (ri[i-1] >= i) {
                //same
                li[i] = li[i-1];
                ri[i] = ri[i-1];
                currkeys[i] = currkeys[i-1];
                //copy the pointer over
            }
            else {
                li[i] = li[i-1];
                currkeys[i] = currkeys[i-1];
                for (int a: keys[i]) currkeys[i]->insert(a);
                expand(li[i],ri[i],*currkeys[i]);        
            }
        }
        else {
            currkeys[i] = new set<int>;
            for (int a: keys[i]) currkeys[i]->insert(a);
            expand(li[i],ri[i],*currkeys[i]);
            /*
            ri[i] = furthest[i];
            auto it = lower_bound(pos[C[i-1]].begin(),pos[C[i-1]].end(),i);
            if (it != pos[C[i-1]].end() && *it <= ri[i]) {
                li[i] = min(li[i],li[i-1]);
                ri[i] = max(ri[i],ri[i-1]);
                currkeys[i] = currkeys[i-1];
                for (int j = i; j <= ri[i]; j++) {
                    for (int a: keys[j]) currkeys[i]->insert(a);
                }
                expand(li[i],ri[i],*currkeys[i]);
            }
            else {
                currkeys[i] = new set<int>;
                for (int j = i; j <= ri[i]; j++) {
                    for (int a: keys[j]) currkeys[i]->insert(a);
                }
            }
            */
        }
        for (Query q: queries[i]) {
            ans[q.id] = (li[i] <= q.en && q.en <= ri[i]) ? "YES" : "NO"; 
        }
    }
    //output
    for (int i = 0; i < Q; i++) {
        cout << ans[i] << '\n';
    }

    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 48376 KB Output is correct
2 Correct 144 ms 48252 KB Output is correct
3 Correct 258 ms 48504 KB Output is correct
4 Correct 48 ms 48120 KB Output is correct
5 Correct 47 ms 47992 KB Output is correct
6 Correct 46 ms 48252 KB Output is correct
7 Correct 49 ms 49144 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 48376 KB Output is correct
2 Correct 144 ms 48252 KB Output is correct
3 Correct 258 ms 48504 KB Output is correct
4 Correct 48 ms 48120 KB Output is correct
5 Correct 47 ms 47992 KB Output is correct
6 Correct 46 ms 48252 KB Output is correct
7 Correct 49 ms 49144 KB Output is correct
8 Correct 315 ms 74348 KB Output is correct
9 Correct 287 ms 74204 KB Output is correct
10 Correct 426 ms 75000 KB Output is correct
11 Correct 507 ms 73720 KB Output is correct
12 Correct 322 ms 73852 KB Output is correct
13 Correct 226 ms 75256 KB Output is correct
14 Correct 294 ms 75384 KB Output is correct
15 Correct 253 ms 75000 KB Output is correct
16 Correct 292 ms 75128 KB Output is correct
17 Correct 226 ms 75384 KB Output is correct
18 Correct 247 ms 75000 KB Output is correct
19 Correct 228 ms 75236 KB Output is correct
20 Correct 244 ms 73424 KB Output is correct
21 Correct 238 ms 75256 KB Output is correct
22 Correct 227 ms 75256 KB Output is correct
23 Correct 270 ms 74500 KB Output is correct
24 Correct 274 ms 74664 KB Output is correct
25 Correct 290 ms 74548 KB Output is correct
26 Correct 277 ms 74232 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3091 ms 96800 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 48376 KB Output is correct
2 Correct 144 ms 48252 KB Output is correct
3 Correct 258 ms 48504 KB Output is correct
4 Correct 48 ms 48120 KB Output is correct
5 Correct 47 ms 47992 KB Output is correct
6 Correct 46 ms 48252 KB Output is correct
7 Correct 49 ms 49144 KB Output is correct
8 Correct 315 ms 74348 KB Output is correct
9 Correct 287 ms 74204 KB Output is correct
10 Correct 426 ms 75000 KB Output is correct
11 Correct 507 ms 73720 KB Output is correct
12 Correct 322 ms 73852 KB Output is correct
13 Correct 226 ms 75256 KB Output is correct
14 Correct 294 ms 75384 KB Output is correct
15 Correct 253 ms 75000 KB Output is correct
16 Correct 292 ms 75128 KB Output is correct
17 Correct 226 ms 75384 KB Output is correct
18 Correct 247 ms 75000 KB Output is correct
19 Correct 228 ms 75236 KB Output is correct
20 Correct 244 ms 73424 KB Output is correct
21 Correct 238 ms 75256 KB Output is correct
22 Correct 227 ms 75256 KB Output is correct
23 Correct 270 ms 74500 KB Output is correct
24 Correct 274 ms 74664 KB Output is correct
25 Correct 290 ms 74548 KB Output is correct
26 Correct 277 ms 74232 KB Output is correct
27 Execution timed out 3091 ms 96800 KB Time limit exceeded
28 Halted 0 ms 0 KB -