oj.uz

답안 #845735

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
845735 2023-09-06T15:10:13 Z vjudge1 Trener (COCI20_trener) C++17
110 / 110
 337 ms 336332 KB 
#include <bits/stdc++.h>
#define int long long int
#define MP make_pair
#define pb push_back
#define REP(i,n) for(int (i) = 0; (i) < (n); (i)++)


using namespace std;

const double EPS = 0.00001;
const int INF = 1e9+500;
const int MOD = 1e9+7;
const int N = 55;
const int K = 1505;
const int ALPH = 26;
int n,m,q,k;
vector<vector<string> > names;
vector<vector<int> > res;
int add(int x, int y) {
    if(x+y < MOD) return x+y;
    return x+y-MOD; 
}
int mull(int x, int y) {
    return (x*y)%MOD;
}

struct TrieNode {
    TrieNode *c[ALPH];
    int val;
    TrieNode() {
        for(int i = 0; i<ALPH; i++) {
            c[i] = NULL;
        }
        val = 0;
    }
    
    void insert(string s, int num, int index) {
        if(index == s.size()) {
            val = add(val,num);
            return;
        }
        if(c[s[index] - 'a'] == NULL) {
        
            c[s[index] - 'a'] = new TrieNode();
        }
        c[s[index] - 'a']->insert(s,num, index+1);
    }

    int query(string s, int index) {
        if(index == s.size()) {
            return val;
        }
        if(c[s[index] - 'a'] == NULL) {
            return 0;
        }
        return c[s[index] - 'a']->query(s, index+1);
    }

};

void solve() {
    cin>>n>>k;
    res.resize(n+1, vector<int> (k));
    names.resize(n+1, vector<string> (k));
    for(int i = 1; i<=n; i++) {
        for(int j = 0; j<k; j++) {
            cin>>names[i][j];
        }
        
    }
    TrieNode *roots[N];
    for(int i = 1; i<=n; i++) {
        roots[i] = new TrieNode();
    }
    for(int i = 0; i <k; i++) {
        res[1][i] = 1;
    }

    for(int i = 1; i<n; i++) {
        for(int j = 0; j<k; j++) {
            //cout<<"i:"<<i<<" j:"<<j<<"\n";
            roots[i]->insert(names[i][j], res[i][j], 0);
            
        }
        for(int j = 0; j<k; j++) {
            string s = names[i+1][j].substr(0,i) ,t = names[i+1][j].substr(1,i);
            //cout<<"i:"<<i<<" j:"<<j<<"\n";
            res[i+1][j] = roots[i]->query(s, 0);
            if(s!=t) {
                res[i+1][j] = add(res[i+1][j] , roots[i]->query(t, 0));
            }
            
        }
    }
    int ans = 0;
    for(int i = 0; i<k; i++) {
        ans = add(ans , res[n][i]);
    }
    cout<<ans<<"\n";
}
 
signed main() {
    int test = 1;
    //cin>>test;
    while(test--) {
        solve();
    }
    
}

Compilation message

trener.cpp: In member function 'void TrieNode::insert(std::string, long long int, long long int)':
trener.cpp:39:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         if(index == s.size()) {
      |            ~~~~~~^~~~~~~~~~~
trener.cpp: In member function 'long long int TrieNode::query(std::string, long long int)':
trener.cpp:51:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         if(index == s.size()) {
      |            ~~~~~~^~~~~~~~~~~

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 23388 KB Output is correct
2 Correct 23 ms 22872 KB Output is correct
3 Correct 21 ms 23384 KB Output is correct
4 Correct 8 ms 1116 KB Output is correct
5 Correct 18 ms 16320 KB Output is correct
6 Correct 19 ms 16464 KB Output is correct
7 Correct 8 ms 1372 KB Output is correct

Subtask #3
55.0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 24 ms 23388 KB Output is correct
6 Correct 23 ms 22872 KB Output is correct
7 Correct 21 ms 23384 KB Output is correct
8 Correct 8 ms 1116 KB Output is correct
9 Correct 18 ms 16320 KB Output is correct
10 Correct 19 ms 16464 KB Output is correct
11 Correct 8 ms 1372 KB Output is correct
12 Correct 326 ms 336332 KB Output is correct
13 Correct 337 ms 335700 KB Output is correct
14 Correct 334 ms 335764 KB Output is correct
15 Correct 337 ms 335676 KB Output is correct
16 Correct 119 ms 8916 KB Output is correct
17 Correct 259 ms 195928 KB Output is correct
18 Correct 257 ms 198428 KB Output is correct
19 Correct 253 ms 198228 KB Output is correct
20 Correct 248 ms 198116 KB Output is correct
21 Correct 254 ms 198292 KB Output is correct
22 Correct 117 ms 8964 KB Output is correct