Submission #1266980

#	Time	Username	Problem	Language	Result	Execution time	Memory
1266980		nendhx	Trener (COCI20_trener)	C++20	110 / 110	696 ms	6080 KiB

trener

#include<bits/stdc++.h>
#define int long long
using namespace std;
int mod = 1e9 + 7;

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    int n, k, sum = 0;
    cin >> n >> k;
    string s[n][k];
    vector<vector<int>> dp(n, vector<int>(k));
    for(int i = 0; i < k; i++){
        dp[0][i] = 1;
    }
    for(int i = 0; i < n; i++){
        for(int j = 0; j < k; j++){
            cin >> s[i][j];
            if(i == 0){
                continue;
            }
            string a = s[i][j].substr(0, i), b = s[i][j].substr(1, i);
            for(int l = 0; l < k; l++){
                if(a == s[i - 1][l] || b == s[i - 1][l]){
                    dp[i][j] = (dp[i][j] + dp[i - 1][l]) % mod;
                }
            }
        }
    }
    for(int i = 0; i < k; i++){
        sum = (sum + dp[n - 1][i]) % mod;
    }
    cout << sum << '\n';
    return 0;
}

• Subtask 1: 22 / 22
• Subtask 2: 33 / 33
• Subtask 3: 55 / 55