oj.uz

Submission #433242

# Submission time Handle Problem Language Result Execution time Memory
433242 2021-06-19T10:46:06 Z parsabahrami Dabbeh (INOI20_dabbeh) C++17
25 / 100
 2000 ms 430396 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O2")

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 6 ms 4428 KB Output is correct
2 Correct 338 ms 28836 KB Output is correct
3 Correct 294 ms 21516 KB Output is correct
4 Correct 338 ms 28864 KB Output is correct
5 Correct 322 ms 24556 KB Output is correct
6 Correct 364 ms 31788 KB Output is correct
7 Correct 441 ms 34224 KB Output is correct
8 Correct 380 ms 32940 KB Output is correct
9 Correct 395 ms 30872 KB Output is correct
10 Correct 178 ms 11908 KB Output is correct
11 Correct 382 ms 32388 KB Output is correct
12 Correct 202 ms 18544 KB Output is correct
13 Correct 268 ms 24724 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1713 ms 423460 KB Output is correct
2 Execution timed out 2105 ms 430396 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4428 KB Output is correct
2 Correct 338 ms 28836 KB Output is correct
3 Correct 294 ms 21516 KB Output is correct
4 Correct 338 ms 28864 KB Output is correct
5 Correct 322 ms 24556 KB Output is correct
6 Correct 364 ms 31788 KB Output is correct
7 Correct 441 ms 34224 KB Output is correct
8 Correct 380 ms 32940 KB Output is correct
9 Correct 395 ms 30872 KB Output is correct
10 Correct 178 ms 11908 KB Output is correct
11 Correct 382 ms 32388 KB Output is correct
12 Correct 202 ms 18544 KB Output is correct
13 Correct 268 ms 24724 KB Output is correct
14 Correct 1713 ms 423460 KB Output is correct
15 Execution timed out 2105 ms 430396 KB Time limit exceeded
16 Halted 0 ms 0 KB -