oj.uz

답안 #1079087

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1079087 2024-08-28T10:33:48 Z boris_mihov Selling RNA Strands (JOI16_selling_rna) C++17
35 / 100
 927 ms 128888 KB 
#include <unordered_map>
#include <algorithm>
#include <iostream>
#include <numeric>
#include <cassert>
#include <vector>
#include <map>

typedef long long llong;
const int MAXN = 100000 + 10;
const int MOD1 = 1000003013;
const int MOD2 = 1000003241;
const int BASE = 5;

int n, q;
int decode[256];
// int base1[MAXN];
// int base2[MAXN];
struct String
{
    std::string value;
    struct Hash
    {
        llong value1, value2;
        Hash()
        {
            value1 = value2 = 0;
        }
        
        void push(char letter)
        {
            value1 *= BASE;
            value2 *= BASE;
            value1 += decode[letter];
            value2 += decode[letter];
            value1 %= MOD1;
            value2 %= MOD2;
        }

        friend bool operator < (const Hash &a, const Hash &b)
        {
            return a.value1 < b.value1 || (a.value1 == b.value1 && a.value2 < b.value2);
        }

        friend bool operator == (const Hash &a, const Hash &b)
        {
            return a.value1 == b.value1 && a.value2 == b.value2;
        }
    };

    std::vector <Hash> prefix;
    void initalize()
    {
        Hash curr;
        prefix.reserve(value.size());
        for (int i = 0 ; i < value.size() ; ++i)
        {
            curr.push(value[i]);
            prefix.push_back(curr);
        }
    }

    friend bool operator < (const String &a, const String &b)
    {
        int l = -1, r = std::max(a.value.size(), b.value.size()), mid;
        while (l < r - 1)
        {
            mid = l + r >> 1;
            if (a.prefix[mid] == b.prefix[mid]) l = mid;
            else r = mid;
        }

        if (r == std::max(a.value.size(), b.value.size()))
        {
            return a.value.size() < b.value.size();
        }

        return a.value[r] < b.value[r];
    }

    bool isPrefix(const String &a)
    {
        if (a.value.size() <= value.size() && a.prefix.back() == prefix[a.value.size() - 1]) return true;
        return false;
    }
};

String s[MAXN];
struct Query
{
    char type;
    String::Hash hash;
    int idx;
};

int output[MAXN];
std::vector <Query> queries[MAXN];

void solve()
{
    std::sort(s + 1, s + 1 + n);
    for (int i = 1 ; i <= q ; ++i)
    {
        String p, q;
        std::cin >> p.value >> q.value;
        std::reverse(q.value.begin(), q.value.end());
        p.initalize(); q.initalize();
        
        int start, end;
        {
            int l = 0, r = n + 1, mid;
            while (l < r - 1)
            {
                mid = l + r >> 1;
                if (s[mid].isPrefix(p))
                {
                    r = mid;
                    continue;
                }

                if (s[mid] < p) l = mid;
                else r = mid;
            }
            
            start = r;
        }

        {
            int l = 0, r = n + 1, mid;
            while (l < r - 1)
            {
                mid = l + r >> 1;
                // std::cout << "here: " << p.value << ' ' << s[mid].value << ' ' << l << ' ' << r << ' ' << mid << ' ' << (p.value < s[mid].value) << '\n';
                if (s[mid].isPrefix(p))
                {
                    l = mid;
                    continue;
                }

                if (s[mid] < p) l = mid;
                else r = mid;
            }
            
            end = l;
        }

        if (end < start)
        {
            continue;
        }

        assert(s[start].isPrefix(p));
        assert(s[end].isPrefix(p));
        // std::cout << "start end: " << p.value << ' ' << start << ' ' << end << '\n';
        queries[start - 1].push_back({'-', q.prefix.back(), i});
        queries[end].push_back({'+', q.prefix.back(), i});
    }

    std::unordered_map <llong, int> cnt;
    for (int i = 1 ; i <= n ; ++i)
    {
        String::Hash curr;
        for (int j = s[i].value.size() - 1 ; j >= 0 ; --j)
        {
            curr.push(s[i].value[j]);
            cnt[curr.value1 * MOD1 + curr.value2]++;
        }

        for (const auto &[type, h, idx] : queries[i])
        {
            if (type == '-') output[idx] -= cnt[h.value1 * MOD1 + h.value2];
            else output[idx] += cnt[h.value1 * MOD1 + h.value2];
        }
    }
}

void input()
{
    std::cin >> n >> q;
    for (int i = 1 ; i <= n ; ++i)
    {
        std::cin >> s[i].value;
        s[i].initalize();
    }
}

void print()
{
    for (int i = 1 ; i <= q ; ++i)
    {
        std::cout << output[i] << '\n';
    }
}

void fastIOI()
{
    std::ios_base :: sync_with_stdio(0);
    std::cout.tie(nullptr);
    std::cin.tie(nullptr);
}

void initialize()
{
    decode['A'] = 1;
    decode['C'] = 2;
    decode['G'] = 3;
    decode['U'] = 4;

    // base1[0] = base2[0] = 1;
    // for (int i = 1 ; i < MAXN ; ++i)
    // {
    //     base1[i] = (1LL * base1[i - 1] * BASE) % MOD1;
    //     base2[i] = (1LL * base2[i - 1] * BASE) % MOD2;
    // }
}

int main()
{
    initialize();
    fastIOI();
    input();
    solve();
    print();

    return 0;
}

Compilation message

selling_rna.cpp: In member function 'void String::Hash::push(char)':
selling_rna.cpp:34:30: warning: array subscript has type 'char' [-Wchar-subscripts]
   34 |             value1 += decode[letter];
      |                              ^~~~~~
selling_rna.cpp:35:30: warning: array subscript has type 'char' [-Wchar-subscripts]
   35 |             value2 += decode[letter];
      |                              ^~~~~~
selling_rna.cpp: In member function 'void String::initalize()':
selling_rna.cpp:56:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         for (int i = 0 ; i < value.size() ; ++i)
      |                          ~~^~~~~~~~~~~~~~
selling_rna.cpp: In function 'bool operator<(const String&, const String&)':
selling_rna.cpp:68:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   68 |             mid = l + r >> 1;
      |                   ~~^~~
selling_rna.cpp:73:15: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
   73 |         if (r == std::max(a.value.size(), b.value.size()))
      |             ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
selling_rna.cpp: In function 'void solve()':
selling_rna.cpp:114:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  114 |                 mid = l + r >> 1;
      |                       ~~^~~
selling_rna.cpp:132:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  132 |                 mid = l + r >> 1;
      |                       ~~^~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8284 KB Output is correct
2 Correct 4 ms 8284 KB Output is correct
3 Correct 4 ms 8284 KB Output is correct
4 Correct 3 ms 8284 KB Output is correct
5 Correct 6 ms 8284 KB Output is correct
6 Correct 3 ms 8284 KB Output is correct
7 Correct 4 ms 8284 KB Output is correct

Subtask #2
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 927 ms 128888 KB Output is correct
2 Correct 810 ms 126896 KB Output is correct
3 Correct 92 ms 45912 KB Output is correct
4 Correct 81 ms 45976 KB Output is correct
5 Incorrect 443 ms 81320 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 38 ms 14964 KB Output is correct
2 Correct 31 ms 13772 KB Output is correct
3 Correct 34 ms 14268 KB Output is correct
4 Correct 30 ms 13324 KB Output is correct
5 Correct 30 ms 13252 KB Output is correct
6 Correct 37 ms 14020 KB Output is correct

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 8284 KB Output is correct
2 Correct 4 ms 8284 KB Output is correct
3 Correct 4 ms 8284 KB Output is correct
4 Correct 3 ms 8284 KB Output is correct
5 Correct 6 ms 8284 KB Output is correct
6 Correct 3 ms 8284 KB Output is correct
7 Correct 4 ms 8284 KB Output is correct
8 Correct 927 ms 128888 KB Output is correct
9 Correct 810 ms 126896 KB Output is correct
10 Correct 92 ms 45912 KB Output is correct
11 Correct 81 ms 45976 KB Output is correct
12 Incorrect 443 ms 81320 KB Output isn't correct
13 Halted 0 ms 0 KB -