oj.uz

Submission #632042

# Submission time Handle Problem Language Result Execution time Memory
632042 2022-08-19T10:40:34 Z AA_Surely Dabbeh (INOI20_dabbeh) C++14
50 / 100
 2000 ms 180424 KB 
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#include <bits/stdc++.h>

#define FOR(i, x, n) for(int i = x; i < n; i++)
#define F0R(i, n) FOR(i, 0, n)
#define ROF(i, x, n) for(int i = n - 1; i >= x; i--)
#define R0F(i, n) ROF(i, 0, n)

#define WTF cout << "WTF" << endl

#define IOS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define F first
#define S second
#define PB push_back

#define ALL(x) x.begin(), x.end()
#define RALL(x) x.rbegin(), x.rend()

using namespace std;

typedef long long LL;

typedef pair<int, int> PII;
typedef pair<LL, LL> PLL;

typedef vector<int> VI;
typedef vector<LL> VLL;
typedef vector<PII> VPII;
typedef vector<PLL> VPLL;

const int L = 3e5 + 2;
const int N = 5e5 + 2;
const int M = 5e5 + 2;
const int LOG = 20;
const int B[2] = {313, 131};
const int MOD = 1e9 + 7;
const int INF = 1e9 + 7;

#define endl '\n'
#define lc now << 1
#define rc now << 1 | 1

int q, m, n;
LL tmp[L];
LL hsh[2][L], pw[2][L];
unordered_set<LL> keep[M];
string ts[N], s;

struct IntMaxSeg {
    int tree[N << 2];

    int build(int now = 1, int ls = 0, int rs = n) {
        if (ls == rs) return tree[now] = tmp[ls];
        int mid = (ls + rs) >> 1;
        return tree[now] = max(build(lc, ls, mid), build(rc, mid + 1, rs));
    }

    int get(int lq, int rq, int now = 1, int ls = 0, int rs = n) {
        if (rq < lq || rq < ls || rs < lq) return 0;
        if (lq <= ls && rs <= rq) return tree[now];
        int mid = (ls + rs) >> 1;
        return max(get(lq, rq, lc, ls, mid), get(lq, rq, rc, mid + 1, rs));
    }
} dp[LOG];

void init() {
    cin >> q >> m;
    F0R(i, q) cin >> ts[i];

    cin >> s;
    n = s.length();
}

void calcHash(int id) {
    PLL h = {0, 0};
    F0R(i, min((int)ts[id].length(), n)) {
        h.F = (h.F * B[0] + ts[id][i]) % MOD;
        h.S = (h.S * B[1] + ts[id][i]) % MOD;
        keep[i + 1].insert(h.F * MOD + h.S);
    }

    return;
}

void mainHash() {

    F0R(k, 2) {
        hsh[k][0] = s[0];
        pw[k][0] = 1;

        FOR(i, 1, n) {
            hsh[k][i] = (hsh[k][i - 1] * B[k] + s[i]) % MOD;
            pw[k][i] = pw[k][i - 1] * B[k] % MOD;
        }
    }

    return;
}

inline LL getH(int l, int r) {
    if (!l) return hsh[0][r] * MOD + hsh[1][r];
    return ((hsh[0][r] - (hsh[0][l - 1] * pw[0][r - l + 1] % MOD) + MOD) % MOD) * MOD + 
            ((hsh[1][r] - (hsh[1][l - 1] * pw[1][r - l + 1] % MOD) + MOD) % MOD);
}

void dpBase() {
    F0R(i, n + 1) {
        int l = i, r = n, mid;
        while(l < r) {
            mid = (l + r) >> 1;
            if (keep[mid - i + 1].count(getH(i, mid))) l = mid + 1;
            else r = mid;
        }

        tmp[i] = l;
    }

    dp[0].build();
}

void calcLayer(int id) {
    F0R(i, n + 1) {
        int x = dp[id - 1].get(i, i);
        tmp[i] = dp[id - 1].get(i, x);
    }

    dp[id].build();
}

void handleQuery() {
    int l, r; 
    cin >> l >> r;
    r--;

    int now = l, sum = 0;
    if (dp[LOG - 1].get(l, l) <= r) {
        cout << -1 << endl;
        return;
    }

    R0F(i, LOG) {
        int x = dp[i].get(l, now);
        if (x <= r) {
            sum += (1 << i);
            now = x;
        }
    }
    
    cout << sum + 1 << endl;
}

int main() {
    IOS;

    init();

    F0R(i, q) calcHash(i);
    mainHash();
    dpBase();

    FOR(i, 1, LOG) calcLayer(i);
    while(m--) handleQuery();

    return 0;
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 43500 KB Output is correct
2 Correct 345 ms 55660 KB Output is correct
3 Correct 482 ms 56212 KB Output is correct
4 Correct 618 ms 60540 KB Output is correct
5 Correct 566 ms 58616 KB Output is correct
6 Correct 684 ms 63256 KB Output is correct
7 Correct 484 ms 46916 KB Output is correct
8 Correct 603 ms 64584 KB Output is correct
9 Correct 512 ms 61260 KB Output is correct
10 Correct 399 ms 48592 KB Output is correct
11 Correct 280 ms 44808 KB Output is correct
12 Correct 293 ms 44612 KB Output is correct
13 Correct 286 ms 44768 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1535 ms 144920 KB Output is correct
2 Correct 1634 ms 150036 KB Output is correct
3 Correct 1523 ms 146004 KB Output is correct
4 Correct 1471 ms 141192 KB Output is correct
5 Correct 1461 ms 140872 KB Output is correct
6 Correct 1650 ms 150404 KB Output is correct
7 Correct 1659 ms 152456 KB Output is correct
8 Correct 1570 ms 148012 KB Output is correct
9 Correct 1696 ms 151004 KB Output is correct
10 Correct 1607 ms 154420 KB Output is correct
11 Correct 1506 ms 146052 KB Output is correct
12 Correct 1564 ms 144728 KB Output is correct
13 Correct 1716 ms 155872 KB Output is correct
14 Correct 1614 ms 153844 KB Output is correct
15 Correct 1400 ms 139056 KB Output is correct
16 Correct 1133 ms 180424 KB Output is correct
17 Correct 1151 ms 155544 KB Output is correct
18 Correct 1117 ms 154828 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 43500 KB Output is correct
2 Correct 345 ms 55660 KB Output is correct
3 Correct 482 ms 56212 KB Output is correct
4 Correct 618 ms 60540 KB Output is correct
5 Correct 566 ms 58616 KB Output is correct
6 Correct 684 ms 63256 KB Output is correct
7 Correct 484 ms 46916 KB Output is correct
8 Correct 603 ms 64584 KB Output is correct
9 Correct 512 ms 61260 KB Output is correct
10 Correct 399 ms 48592 KB Output is correct
11 Correct 280 ms 44808 KB Output is correct
12 Correct 293 ms 44612 KB Output is correct
13 Correct 286 ms 44768 KB Output is correct
14 Correct 1535 ms 144920 KB Output is correct
15 Correct 1634 ms 150036 KB Output is correct
16 Correct 1523 ms 146004 KB Output is correct
17 Correct 1471 ms 141192 KB Output is correct
18 Correct 1461 ms 140872 KB Output is correct
19 Correct 1650 ms 150404 KB Output is correct
20 Correct 1659 ms 152456 KB Output is correct
21 Correct 1570 ms 148012 KB Output is correct
22 Correct 1696 ms 151004 KB Output is correct
23 Correct 1607 ms 154420 KB Output is correct
24 Correct 1506 ms 146052 KB Output is correct
25 Correct 1564 ms 144728 KB Output is correct
26 Correct 1716 ms 155872 KB Output is correct
27 Correct 1614 ms 153844 KB Output is correct
28 Correct 1400 ms 139056 KB Output is correct
29 Correct 1133 ms 180424 KB Output is correct
30 Correct 1151 ms 155544 KB Output is correct
31 Correct 1117 ms 154828 KB Output is correct
32 Execution timed out 2089 ms 96076 KB Time limit exceeded
33 Halted 0 ms 0 KB -