oj.uz

Submission #1048160

# Submission time Handle Problem Language Result Execution time Memory
1048160 2024-08-08T03:24:43 Z vjudge1 Selling RNA Strands (JOI16_selling_rna) C++17
100 / 100
 157 ms 45324 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define fi first
#define se second

const int N = 2e6 + 3;

int n, m;
string s, p, q;
vector<pair<string, int> > a, b;
int ans = 0;

//////////////////// Persistent IT

int nVer = 0;

struct Node {
    int left, right;    // ID of left child & right child
    long long ln;       // Max value of node
    Node() {}
    Node(long long ln, int left, int right) : ln(ln), left(left), right(right) {}
} it[1 << 21];         // Each node has a position in this array, called ID
int nNode;

const int MN = 1e5 + 3;
int ver[MN];            // ID of root in each version

// Update max value of a node
inline void refine(int cur) {
    it[cur].ln = (it[it[cur].left].ln + it[it[cur].right].ln);
}

// Update a range, and return new ID of node
int update(int l, int r, int u, int x, int oldId) {
    if (l == r) {
//        cout << l << ' ' << x << ' ' << nNode + 1 << '\n';
        ++nNode;
        it[nNode] = Node(x + it[nNode].ln, 0, 0);
        return nNode;
    }

    int mid = (l + r) >> 1;
    int cur = ++nNode;

    if (u <= mid) {
        it[cur].left = update(l, mid, u, x, it[oldId].left);
        it[cur].right = it[oldId].right;
        refine(cur);
    }
    else {
        it[cur].left = it[oldId].left;
        it[cur].right = update(mid+1, r, u, x, it[oldId].right);
        refine(cur);
    }

    return cur;
}

// Get max of range. Same as usual IT
int get(int nodeId, int l, int r, int u, int v) {
    if (v < l || r < u) return -1;
    if (u <= l && r <= v) return it[nodeId].ln;

    int mid = (l + r) >> 1;
    return (get(it[nodeId].left, l, mid, u, v) + get(it[nodeId].right, mid+1, r, u, v));
}


//// When update:
//    ++nVer;
//    ver[nVer] = update(1, n, u, x, ver[nVer-1]);
//
//// When query:
//    res = get(ver[t], 1, n, u, v);

int main () {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    cin >> n >> m;
    for (int i = 1; i <= n; ++ i) {
        cin >> s;
        a.push_back({s, i});
    }

    sort (a.begin(), a.end());
    for (int i = 0; i < n; ++ i) {
        s = a[i].fi;
        reverse(s.begin(), s.end());
        b.push_back({s, i});
    }

    sort (b.begin(), b.end());

    for (auto [s, id] : b) {
        ++ nVer;
        ver[nVer] = update(0, n - 1, id, 1, ver[nVer-1]);
    }

//    for (auto [s, id] : a) cout << s << '\n';
//    for (auto [s, id] : b) cout << s << ' ' << id << '\n';

    while (m --) {
        cin >> p >> q;
        reverse(q.begin(), q.end());

        int l = lower_bound(a.begin(), a.end(), make_pair(p, -1)) - a.begin();
        p.back() ++;
        int r = lower_bound(a.begin(), a.end(), make_pair(p, -1)) - a.begin() - 1;

        int tl = lower_bound(b.begin(), b.end(), make_pair(q, -1)) - b.begin();
        q.back() ++;
        int tr = lower_bound(b.begin(), b.end(), make_pair(q, -1)) - b.begin() - 1;

        if (l >= a.size() || tl >= b.size()) {
            cout << 0 << '\n';
            continue;
        }

//        cout << l << ' ' << r << ' ' << tl << ' ' << tr + 1 << '\n';
        cout << get(ver[tr + 1], 0, n-1, l, r) - get(ver[tl], 0, n-1, l, r) << '\n';
    }
}

Compilation message

selling_rna.cpp: In constructor 'Node::Node(long long int, int, int)':
selling_rna.cpp:22:15: warning: 'Node::ln' will be initialized after [-Wreorder]
   22 |     long long ln;       // Max value of node
      |               ^~
selling_rna.cpp:21:9: warning:   'int Node::left' [-Wreorder]
   21 |     int left, right;    // ID of left child & right child
      |         ^~~~
selling_rna.cpp:24:5: warning:   when initialized here [-Wreorder]
   24 |     Node(long long ln, int left, int right) : ln(ln), left(left), right(right) {}
      |     ^~~~
selling_rna.cpp: In function 'int main()':
selling_rna.cpp:118:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::__cxx11::basic_string<char>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |         if (l >= a.size() || tl >= b.size()) {
      |             ~~^~~~~~~~~~~
selling_rna.cpp:118:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::__cxx11::basic_string<char>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |         if (l >= a.size() || tl >= b.size()) {
      |                              ~~~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 4892 KB Output is correct
2 Correct 16 ms 6072 KB Output is correct
3 Correct 16 ms 5396 KB Output is correct
4 Correct 19 ms 5812 KB Output is correct
5 Correct 15 ms 4536 KB Output is correct
6 Correct 14 ms 4548 KB Output is correct
7 Correct 13 ms 3932 KB Output is correct
8 Correct 21 ms 5816 KB Output is correct
9 Correct 20 ms 6016 KB Output is correct
10 Correct 13 ms 5816 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 19000 KB Output is correct
2 Correct 46 ms 11136 KB Output is correct
3 Correct 48 ms 15952 KB Output is correct
4 Correct 36 ms 13384 KB Output is correct
5 Correct 34 ms 11140 KB Output is correct
6 Correct 45 ms 15932 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 11 ms 4892 KB Output is correct
9 Correct 16 ms 6072 KB Output is correct
10 Correct 16 ms 5396 KB Output is correct
11 Correct 19 ms 5812 KB Output is correct
12 Correct 15 ms 4536 KB Output is correct
13 Correct 14 ms 4548 KB Output is correct
14 Correct 13 ms 3932 KB Output is correct
15 Correct 21 ms 5816 KB Output is correct
16 Correct 20 ms 6016 KB Output is correct
17 Correct 13 ms 5816 KB Output is correct
18 Correct 62 ms 19000 KB Output is correct
19 Correct 46 ms 11136 KB Output is correct
20 Correct 48 ms 15952 KB Output is correct
21 Correct 36 ms 13384 KB Output is correct
22 Correct 34 ms 11140 KB Output is correct
23 Correct 45 ms 15932 KB Output is correct
24 Correct 35 ms 9584 KB Output is correct
25 Correct 54 ms 9584 KB Output is correct
26 Correct 27 ms 9588 KB Output is correct
27 Correct 35 ms 9400 KB Output is correct
28 Correct 157 ms 45324 KB Output is correct
29 Correct 138 ms 38192 KB Output is correct