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Submission #631894

# Submission time Handle Problem Language Result Execution time Memory
631894 2022-08-19T05:18:42 Z AA_Surely Dabbeh (INOI20_dabbeh) C++14
25 / 100
 1821 ms 160756 KB 
#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 decond
#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 = 1e6 + 2;
const int N = 5e5 + 2;
const int M = 5e5 + 2;
const int LOG = 25;
const int B = 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[L], pw[L];
unordered_set<int> 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) {
    LL h = 0;
    F0R(i, (int)ts[id].length()) {
        h = (h * B + ts[id][i]) % MOD;
        keep[i + 1].insert(h);
    }

    return;
}

void mainHash() {
    hsh[0] = s[0];
    pw[0] = 1;

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

    return;
}

inline LL getH(int l, int r) {
    if (!l) return hsh[r];
    return (hsh[r] - (hsh[l - 1] * pw[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;
    int ans = INF, 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) 
            ans = min(ans, sum + (1 << i));
        else {
            sum += (1 << i);
            now = x;
        }
    }
    
    cout << ans << 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 23 ms 43476 KB Output is correct
2 Correct 427 ms 60972 KB Output is correct
3 Correct 526 ms 56664 KB Output is correct
4 Correct 633 ms 60536 KB Output is correct
5 Correct 609 ms 59012 KB Output is correct
6 Correct 633 ms 63256 KB Output is correct
7 Correct 702 ms 66888 KB Output is correct
8 Correct 688 ms 64576 KB Output is correct
9 Correct 582 ms 62352 KB Output is correct
10 Correct 453 ms 48628 KB Output is correct
11 Correct 471 ms 105860 KB Output is correct
12 Correct 392 ms 73256 KB Output is correct
13 Correct 493 ms 91264 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 1821 ms 160756 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 43476 KB Output is correct
2 Correct 427 ms 60972 KB Output is correct
3 Correct 526 ms 56664 KB Output is correct
4 Correct 633 ms 60536 KB Output is correct
5 Correct 609 ms 59012 KB Output is correct
6 Correct 633 ms 63256 KB Output is correct
7 Correct 702 ms 66888 KB Output is correct
8 Correct 688 ms 64576 KB Output is correct
9 Correct 582 ms 62352 KB Output is correct
10 Correct 453 ms 48628 KB Output is correct
11 Correct 471 ms 105860 KB Output is correct
12 Correct 392 ms 73256 KB Output is correct
13 Correct 493 ms 91264 KB Output is correct
14 Incorrect 1821 ms 160756 KB Output isn't correct
15 Halted 0 ms 0 KB -