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Submission #433272

# Submission time Handle Problem Language Result Execution time Memory
433272 2021-06-19T11:29:03 Z parsabahrami Dabbeh (INOI20_dabbeh) C++17
50 / 100
 2000 ms 439584 KB 
#include <bits/stdc++.h>

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() {
  	mp.max_load_factor(.6), mp.reserve(1 << 4);
    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 294 ms 28832 KB Output is correct
3 Correct 277 ms 24400 KB Output is correct
4 Correct 305 ms 28848 KB Output is correct
5 Correct 295 ms 27424 KB Output is correct
6 Correct 369 ms 31776 KB Output is correct
7 Correct 409 ms 40748 KB Output is correct
8 Correct 414 ms 40752 KB Output is correct
9 Correct 339 ms 30824 KB Output is correct
10 Correct 204 ms 11976 KB Output is correct
11 Correct 358 ms 41180 KB Output is correct
12 Correct 188 ms 18488 KB Output is correct
13 Correct 273 ms 27452 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1505 ms 424844 KB Output is correct
2 Correct 1745 ms 433284 KB Output is correct
3 Correct 1542 ms 425904 KB Output is correct
4 Correct 1033 ms 419436 KB Output is correct
5 Correct 949 ms 419184 KB Output is correct
6 Correct 1622 ms 433452 KB Output is correct
7 Correct 1655 ms 435888 KB Output is correct
8 Correct 1414 ms 431140 KB Output is correct
9 Correct 1588 ms 434160 KB Output is correct
10 Correct 1774 ms 437636 KB Output is correct
11 Correct 1346 ms 426040 KB Output is correct
12 Correct 1258 ms 424484 KB Output is correct
13 Correct 1816 ms 439572 KB Output is correct
14 Correct 1594 ms 437300 KB Output is correct
15 Correct 635 ms 416648 KB Output is correct
16 Correct 1351 ms 439584 KB Output is correct
17 Correct 870 ms 423108 KB Output is correct
18 Correct 830 ms 423064 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 294 ms 28832 KB Output is correct
3 Correct 277 ms 24400 KB Output is correct
4 Correct 305 ms 28848 KB Output is correct
5 Correct 295 ms 27424 KB Output is correct
6 Correct 369 ms 31776 KB Output is correct
7 Correct 409 ms 40748 KB Output is correct
8 Correct 414 ms 40752 KB Output is correct
9 Correct 339 ms 30824 KB Output is correct
10 Correct 204 ms 11976 KB Output is correct
11 Correct 358 ms 41180 KB Output is correct
12 Correct 188 ms 18488 KB Output is correct
13 Correct 273 ms 27452 KB Output is correct
14 Correct 1505 ms 424844 KB Output is correct
15 Correct 1745 ms 433284 KB Output is correct
16 Correct 1542 ms 425904 KB Output is correct
17 Correct 1033 ms 419436 KB Output is correct
18 Correct 949 ms 419184 KB Output is correct
19 Correct 1622 ms 433452 KB Output is correct
20 Correct 1655 ms 435888 KB Output is correct
21 Correct 1414 ms 431140 KB Output is correct
22 Correct 1588 ms 434160 KB Output is correct
23 Correct 1774 ms 437636 KB Output is correct
24 Correct 1346 ms 426040 KB Output is correct
25 Correct 1258 ms 424484 KB Output is correct
26 Correct 1816 ms 439572 KB Output is correct
27 Correct 1594 ms 437300 KB Output is correct
28 Correct 635 ms 416648 KB Output is correct
29 Correct 1351 ms 439584 KB Output is correct
30 Correct 870 ms 423108 KB Output is correct
31 Correct 830 ms 423064 KB Output is correct
32 Correct 1024 ms 275752 KB Output is correct
33 Correct 1479 ms 289528 KB Output is correct
34 Correct 1650 ms 294740 KB Output is correct
35 Correct 1542 ms 292300 KB Output is correct
36 Correct 1529 ms 303352 KB Output is correct
37 Correct 1006 ms 274612 KB Output is correct
38 Execution timed out 2096 ms 439132 KB Time limit exceeded
39 Halted 0 ms 0 KB -