oj.uz

Submission #845614

# Submission time Handle Problem Language Result Execution time Memory
845614 2023-09-06T14:29:41 Z vjudge1 Trener (COCI20_trener) C++11
110 / 110
 139 ms 19316 KB 
#include <bits/stdc++.h>
#define lg(a) (31 - __builtin_clz((a)))
#define endl ("\n")
#define pb push_back
#define mp make_pair
#define lb lower_bound
#define ub upper_bound
#define vi vector<int>
#define st first
#define nd second
#define all(aa) aa.begin(), aa.end()
#define rall(aa) aa.rbegin(), aa.rend()
#define forn(i, n) for(int i=0;i<n;i++)
#define trav(e, x) for(auto& e:x)
#define until(n, v) (int) (lower_bound(v.begin(), v.end(), n)-v.begin()) //# of elements < n
#define after(n, v) (int) (v.end()-upper_bound(v.begin(), v.end(), n))   //# of elements > n
#define sameas(n, v) (int) (upper_bound(v.begin(), v.end(), n) - lower_bound(v.begin(), v.end(), n)) //# of elements ==n
typedef long long ll;
const ll MOD = 1e9+7;
using namespace std;
/*

*/

map<string, ll> dp;
map<string, int> cnt;
vector<set<string>> v;

ll d(string s){
    if(dp.count(s)) return (dp[s]%MOD);
    // cout<<s<<endl;
    if(v[s.size()-1].count(s)==0) return 0;
    string left, right;
    for(int i=0;i<s.size()-1;i++){
        left.pb(s[i]);
    }
    for(int i=1;i<s.size();i++){
        right.pb(s[i]);
    }
    if(right==left) return (d(right)%MOD)*(cnt[right]%MOD)%MOD;
    return dp[s] = (((cnt[left]%MOD)*(d(left)%MOD) + (cnt[right]%MOD)*(d(right)%MOD))%MOD);
}


void solve(){
    int n, k; cin>>n>>k;
    v.resize(n);
    for(int i=0;i<n*k;i++){
        string a; cin>>a;
        cnt[a]++;
        v[a.size()-1].insert(a);
        if(a.size()==1) dp[a]=1;
    }
    ll ans=0;
    for(auto e : v[n-1]){
        ans = (ans+ (d(e)%MOD)*(cnt[e]%MOD))%MOD;
        // cout<<e<<' '<<d(e)<<' '<<d(e)<<d(e)<<endl;
    }
    cout<<ans<<endl;

}

int main(){
	int test; 
    // cin >> test;
    test =1;
   	while (test--){
		solve();
    }
}

Compilation message

trener.cpp: In function 'll d(std::string)':
trener.cpp:34:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(int i=0;i<s.size()-1;i++){
      |                 ~^~~~~~~~~~~
trener.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(int i=1;i<s.size();i++){
      |                 ~^~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 548 KB Output is correct
4 Correct 0 ms 344 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 1624 KB Output is correct
2 Correct 7 ms 1624 KB Output is correct
3 Correct 7 ms 1624 KB Output is correct
4 Correct 3 ms 344 KB Output is correct
5 Correct 6 ms 1368 KB Output is correct
6 Correct 7 ms 1368 KB Output is correct
7 Correct 3 ms 344 KB Output is correct

Subtask #3
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 548 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 7 ms 1624 KB Output is correct
6 Correct 7 ms 1624 KB Output is correct
7 Correct 7 ms 1624 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 6 ms 1368 KB Output is correct
10 Correct 7 ms 1368 KB Output is correct
11 Correct 3 ms 344 KB Output is correct
12 Correct 134 ms 19024 KB Output is correct
13 Correct 133 ms 19284 KB Output is correct
14 Correct 134 ms 19280 KB Output is correct
15 Correct 139 ms 19316 KB Output is correct
16 Correct 39 ms 416 KB Output is correct
17 Correct 117 ms 14928 KB Output is correct
18 Correct 118 ms 15068 KB Output is correct
19 Correct 120 ms 15024 KB Output is correct
20 Correct 137 ms 14952 KB Output is correct
21 Correct 125 ms 15312 KB Output is correct
22 Correct 39 ms 344 KB Output is correct