oj.uz

Submission #433270

# Submission time Handle Problem Language Result Execution time Memory
433270 2021-06-19T11:27:54 Z parsabahrami Dabbeh (INOI20_dabbeh) C++17
50 / 100
 2000 ms 441044 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3, fast-math, unroll-loops")

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(.5), 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:2:51: warning: bad option '-f fast-math' to pragma 'optimize' [-Wpragmas]
    2 | #pragma GCC optimize("O3, fast-math, unroll-loops")
      |                                                   ^
Main.cpp:2:51: warning: bad option '-f unroll-loops' to pragma 'optimize' [-Wpragmas]
Main.cpp:16:52: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes]
   16 |     size_t operator () (const std::pair<T1,T2> &p) const {
      |                                                    ^~~~~
Main.cpp:16:52: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes]
Main.cpp:26:26: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes]
   26 | pii get_hash(int l, int r) {
      |                          ^
Main.cpp:26:26: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes]
Main.cpp:32:22: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes]
   32 | void build_rmq(int id) {
      |                      ^
Main.cpp:32:22: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes]
Main.cpp:45:33: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes]
   45 | int get_max(int id, int l, int r) {
      |                                 ^
Main.cpp:45:33: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes]
Main.cpp:52:10: warning: bad option '-f fast-math' to attribute 'optimize' [-Wattributes]
   52 | int main() {
      |          ^
Main.cpp:52:10: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes]
Main.cpp: In function 'int main()':
Main.cpp:60:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |     scanf("%d%d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:62:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         scanf("%s", S);
      |         ~~~~~^~~~~~~~~
Main.cpp:70:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |     scanf("%s", S + 1); m = strlen(S + 1);
      |     ~~~~~^~~~~~~~~~~~~
Main.cpp:92:24: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         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 282 ms 30336 KB Output is correct
3 Correct 243 ms 25888 KB Output is correct
4 Correct 297 ms 30324 KB Output is correct
5 Correct 265 ms 28892 KB Output is correct
6 Correct 308 ms 33336 KB Output is correct
7 Correct 364 ms 46368 KB Output is correct
8 Correct 316 ms 34468 KB Output is correct
9 Correct 297 ms 32260 KB Output is correct
10 Correct 165 ms 12264 KB Output is correct
11 Correct 298 ms 33956 KB Output is correct
12 Correct 177 ms 19284 KB Output is correct
13 Correct 243 ms 28936 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1136 ms 425640 KB Output is correct
2 Correct 1330 ms 434876 KB Output is correct
3 Correct 1141 ms 426668 KB Output is correct
4 Correct 780 ms 419836 KB Output is correct
5 Correct 774 ms 419676 KB Output is correct
6 Correct 1340 ms 435032 KB Output is correct
7 Correct 1389 ms 437304 KB Output is correct
8 Correct 1237 ms 432544 KB Output is correct
9 Correct 1285 ms 435896 KB Output is correct
10 Correct 1409 ms 439168 KB Output is correct
11 Correct 1175 ms 426740 KB Output is correct
12 Correct 1113 ms 425216 KB Output is correct
13 Correct 1470 ms 441044 KB Output is correct
14 Correct 1370 ms 438816 KB Output is correct
15 Correct 621 ms 416724 KB Output is correct
16 Correct 1110 ms 441036 KB Output is correct
17 Correct 754 ms 423852 KB Output is correct
18 Correct 707 ms 423628 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 282 ms 30336 KB Output is correct
3 Correct 243 ms 25888 KB Output is correct
4 Correct 297 ms 30324 KB Output is correct
5 Correct 265 ms 28892 KB Output is correct
6 Correct 308 ms 33336 KB Output is correct
7 Correct 364 ms 46368 KB Output is correct
8 Correct 316 ms 34468 KB Output is correct
9 Correct 297 ms 32260 KB Output is correct
10 Correct 165 ms 12264 KB Output is correct
11 Correct 298 ms 33956 KB Output is correct
12 Correct 177 ms 19284 KB Output is correct
13 Correct 243 ms 28936 KB Output is correct
14 Correct 1136 ms 425640 KB Output is correct
15 Correct 1330 ms 434876 KB Output is correct
16 Correct 1141 ms 426668 KB Output is correct
17 Correct 780 ms 419836 KB Output is correct
18 Correct 774 ms 419676 KB Output is correct
19 Correct 1340 ms 435032 KB Output is correct
20 Correct 1389 ms 437304 KB Output is correct
21 Correct 1237 ms 432544 KB Output is correct
22 Correct 1285 ms 435896 KB Output is correct
23 Correct 1409 ms 439168 KB Output is correct
24 Correct 1175 ms 426740 KB Output is correct
25 Correct 1113 ms 425216 KB Output is correct
26 Correct 1470 ms 441044 KB Output is correct
27 Correct 1370 ms 438816 KB Output is correct
28 Correct 621 ms 416724 KB Output is correct
29 Correct 1110 ms 441036 KB Output is correct
30 Correct 754 ms 423852 KB Output is correct
31 Correct 707 ms 423628 KB Output is correct
32 Correct 982 ms 275980 KB Output is correct
33 Correct 1371 ms 291052 KB Output is correct
34 Correct 1491 ms 296056 KB Output is correct
35 Correct 1438 ms 293684 KB Output is correct
36 Correct 1523 ms 299188 KB Output is correct
37 Correct 973 ms 274864 KB Output is correct
38 Execution timed out 2098 ms 440780 KB Time limit exceeded
39 Halted 0 ms 0 KB -