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Submission #433255

# Submission time Handle Problem Language Result Execution time Memory
433255 2021-06-19T11:03:16 Z parsabahrami Dabbeh (INOI20_dabbeh) C++17
50 / 100
 2000 ms 439544 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")

using namespace std;
     
typedef long long int ll;
typedef pair<int, int> pii;
  
#define SZ(x)                       (int) x.size()
#define F                           first
#define S                           second
     
const int N = 3e5 + 10, MOD[] = {(int) 1e9 + 9, (int) 1e9 + 7};
struct pair_hash {
    template <class T1, class T2>
    size_t operator () (const std::pair<T1,T2> &p) const {
        auto h1 = std::hash<T1>{}(p.first);
        auto h2 = std::hash<T2>{}(p.second);
        return h1 ^ h2;  
    }
};

int pw[2][N], H[2][N], dp[19][N], rmq[19][19][N], lg[N], n, m, q, base[] = {37, 31}; 
char S[N * 2]; 
unordered_map<pii, int, pair_hash> mp;
pii get_hash(int l, int r) {
    pii h = {(H[0][r] - 1ll * H[0][l - 1] * pw[0][r - l + 1] % MOD[0] + MOD[0]) % MOD[0], 
        (H[1][r] - 1ll * H[1][l - 1] * pw[1][r - l + 1] % MOD[1] + MOD[1]) % MOD[1]};
    return h;
}
     
void build_rmq(int id) {
    for (int i = 1; i <= n; i++) {
        rmq[id][0][i] = dp[id][i];
    }
    for (int i = 1; i < 19; i++) {
        for (int j = 1; j <= n; j++) {
            if (j + (1 << i) <= n + 1) {
                rmq[id][i][j] = max(rmq[id][i - 1][j], rmq[id][i - 1][j + (1 << (i - 1))]);
            }
        }
    }
}
     
int get_max(int id, int l, int r) {
    if (r <= l) return l;
    r = min(r, n + 1);
    int x = lg[r - l];
    return max(rmq[id][x][l], rmq[id][x][r - (1 << x)]);
}
     
int main() {
    for (int i = 2; i < N; i++) 
        lg[i] = lg[i >> 1] + 1;
    pw[0][0] = pw[1][0] = 1;
    for (int i = 1; i < N; i++) 
        for (int j : {0, 1})
            pw[j][i] = 1ll * pw[j][i - 1] * base[j] % MOD[j];
    scanf("%d%d", &n, &q);
    for (int i = 1; i <= n; i++) {
        scanf("%s", S);
        pii h = {0, 0};
        for (int j = 0; S[j]; j++) {
            h = {(1ll * h.F * base[0] % MOD[0] + S[j] - 'a' + 1) % MOD[0], 
                (1ll * h.S * base[1] % MOD[1] + S[j] - 'a' + 1) % MOD[1]};
            mp[h] = 1;
        }
    }
    scanf("%s", S + 1); m = strlen(S + 1);
    for (int i = 1; i <= m; i++) {
        for (int j : {0, 1}) 
            H[j][i] = (1ll * H[j][i - 1] * base[j] % MOD[j] + S[i] - 'a' + 1) % MOD[j];
    }
    swap(n, m);
    for (int i = 1; i <= n; i++) {
        int l = i - 1, r = n + 1;
        while (r - l > 1) {
            int md = (l + r) >> 1;
            if (mp.count(get_hash(i, md))) l = md;
            else r = md;
        }
        dp[0][i] = l + 1;
    }
    for (int j = 1; j < 19; j++) {
        build_rmq(j - 1);
        for (int i = 1; i <= n; i++) {
            dp[j][i] = get_max(j - 1, i, dp[j - 1][i] + 1);
        }
    }
    for (build_rmq(18); q; q--) {
        int l, r; scanf("%d%d", &l, &r); l++;
        int ret = 0, p = l;
        for (int i = 18; ~i; i--) {
            if (get_max(i, l, p + 1) <= r) ret += 1 << i, p = get_max(i, l, p + 1);
        }
        printf("%d\n", ret > n ? -1 : ret + 1);
    }
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:59:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |     scanf("%d%d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:61:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         scanf("%s", S);
      |         ~~~~~^~~~~~~~~
Main.cpp:69:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |     scanf("%s", S + 1); m = strlen(S + 1);
      |     ~~~~~^~~~~~~~~~~~~
Main.cpp:91:24: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |         int l, r; scanf("%d%d", &l, &r); l++;
      |                   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 4428 KB Output is correct
2 Correct 336 ms 28916 KB Output is correct
3 Correct 244 ms 21480 KB Output is correct
4 Correct 354 ms 28832 KB Output is correct
5 Correct 281 ms 24552 KB Output is correct
6 Correct 392 ms 31788 KB Output is correct
7 Correct 373 ms 34168 KB Output is correct
8 Correct 367 ms 33008 KB Output is correct
9 Correct 367 ms 30868 KB Output is correct
10 Correct 164 ms 12236 KB Output is correct
11 Correct 350 ms 32304 KB Output is correct
12 Correct 231 ms 18480 KB Output is correct
13 Correct 261 ms 24644 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1252 ms 423580 KB Output is correct
2 Correct 1642 ms 430432 KB Output is correct
3 Correct 1229 ms 425844 KB Output is correct
4 Correct 803 ms 418772 KB Output is correct
5 Correct 772 ms 418500 KB Output is correct
6 Correct 1633 ms 430756 KB Output is correct
7 Correct 1787 ms 432964 KB Output is correct
8 Correct 1412 ms 428136 KB Output is correct
9 Correct 1647 ms 431432 KB Output is correct
10 Correct 1591 ms 437592 KB Output is correct
11 Correct 1231 ms 426124 KB Output is correct
12 Correct 1241 ms 423132 KB Output is correct
13 Correct 1627 ms 439444 KB Output is correct
14 Correct 1486 ms 437256 KB Output is correct
15 Correct 670 ms 416268 KB Output is correct
16 Correct 1190 ms 439544 KB Output is correct
17 Correct 761 ms 421796 KB Output is correct
18 Correct 751 ms 421592 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 4428 KB Output is correct
2 Correct 336 ms 28916 KB Output is correct
3 Correct 244 ms 21480 KB Output is correct
4 Correct 354 ms 28832 KB Output is correct
5 Correct 281 ms 24552 KB Output is correct
6 Correct 392 ms 31788 KB Output is correct
7 Correct 373 ms 34168 KB Output is correct
8 Correct 367 ms 33008 KB Output is correct
9 Correct 367 ms 30868 KB Output is correct
10 Correct 164 ms 12236 KB Output is correct
11 Correct 350 ms 32304 KB Output is correct
12 Correct 231 ms 18480 KB Output is correct
13 Correct 261 ms 24644 KB Output is correct
14 Correct 1252 ms 423580 KB Output is correct
15 Correct 1642 ms 430432 KB Output is correct
16 Correct 1229 ms 425844 KB Output is correct
17 Correct 803 ms 418772 KB Output is correct
18 Correct 772 ms 418500 KB Output is correct
19 Correct 1633 ms 430756 KB Output is correct
20 Correct 1787 ms 432964 KB Output is correct
21 Correct 1412 ms 428136 KB Output is correct
22 Correct 1647 ms 431432 KB Output is correct
23 Correct 1591 ms 437592 KB Output is correct
24 Correct 1231 ms 426124 KB Output is correct
25 Correct 1241 ms 423132 KB Output is correct
26 Correct 1627 ms 439444 KB Output is correct
27 Correct 1486 ms 437256 KB Output is correct
28 Correct 670 ms 416268 KB Output is correct
29 Correct 1190 ms 439544 KB Output is correct
30 Correct 761 ms 421796 KB Output is correct
31 Correct 751 ms 421592 KB Output is correct
32 Correct 1002 ms 275088 KB Output is correct
33 Correct 1574 ms 286564 KB Output is correct
34 Correct 1650 ms 294648 KB Output is correct
35 Correct 1663 ms 289592 KB Output is correct
36 Correct 1670 ms 297720 KB Output is correct
37 Correct 979 ms 274540 KB Output is correct
38 Execution timed out 2118 ms 439148 KB Time limit exceeded
39 Halted 0 ms 0 KB -