oj.uz

Submission #444492

# Submission time Handle Problem Language Result Execution time Memory
444492 2021-07-14T07:43:12 Z zxcvbnm Parametriziran (COCI19_parametriziran) C++14
99 / 110
 1198 ms 65540 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int p = 31;
const int mod = 1e9 + 9;

int hsh(const string& s) {
    ll ret = 0;
    ll p_pow = 1;

    for(char c : s) {
        int ch = 26;
        if (isalpha(c)) {
            ch = c - 'a';
        } else if (c == '*') {
            ch = 27;
        }

//        cout << c << " " << ch << "\n";
        ret = (ret + ch * p_pow) % mod;
        p_pow = (p_pow * p) % mod;
    }

    return ret;
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, m;
    cin >> n >> m;
    unordered_map<int, int> cnt;
    vector<string> a(n);

    for(int i = 0; i < n; i++) {
        cin >> a[i];
    }

    for(int i = 0; i < n; i++) {
        string str = a[i];
        for(int mask = 0; mask < (1 << m); mask++) {
            for(int j = 0; j < m; j++) {
                if (mask & (1 << j)) {
                    str[j] = '*';
                }
            }
            cnt[hsh(str)]++;
            for(int j = 0; j < m; j++) {
                if (mask & (1 << j)) {
                    str[j] = a[i][j];
                }
            }
        }
    }

    ll ans = 0;
    for(string str : a) {
        vector<int> idx;
        for(int i = 0; i < m; i++) {
            if (isalpha(str[i])) {
                idx.push_back(i);
            }
        }

        int letters = idx.size();
        for(char& c : str) {
            if (c == '?') {
                c = '*';
            }
        }
        string str2 = str;

        for(int mask = 0; mask < (1 << letters); mask++) {
            for(int j = 0; j < letters; j++) {
                if (mask & (1 << j)) {
                    str[idx[j]] = '?';
                }
            }
            ans += cnt[hsh(str)];
            for(int j = 0; j < letters; j++) {
                if (mask & (1 << j)) {
                    str[idx[j]] = str2[idx[j]];
                }
            }
        }
//        cerr << "\n";
    }

    ans -= n;
    ans /= 2;
    cout << ans << "\n";
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 1868 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 1228 KB Output is correct
2 Correct 13 ms 1228 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 1612 KB Output is correct
2 Correct 23 ms 1896 KB Output is correct

Subtask #4
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 1764 KB Output is correct
2 Correct 24 ms 1484 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 2324 KB Output is correct
2 Correct 44 ms 2332 KB Output is correct

Subtask #6
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 180 ms 7836 KB Output is correct
2 Correct 58 ms 2176 KB Output is correct

Subtask #7
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 338 ms 20720 KB Output is correct
2 Correct 98 ms 2436 KB Output is correct

Subtask #8
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 590 ms 29088 KB Output is correct
2 Correct 300 ms 14320 KB Output is correct

Subtask #9
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1142 ms 52292 KB Output is correct
2 Correct 218 ms 3924 KB Output is correct

Subtask #10
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 1198 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -