Cod sursa(job #3304806)

Utilizator Cyb3rBoltSbora Ioan-David Cyb3rBolt Data 27 iulie 2025 15:38:30
Problema Lista lui Andrei Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.93 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin("nrcuv.in");
ofstream fout("nrcuv.out");
const int MOD = 104659;
int n, tt, dp[1003][30]; ///dp[i][j] = nr de moduri de a construi pana la poz i iar la poz i am pe j
bool interzis[30][30];

int main()
{
    fin >> n >> tt;
    while(tt--) {
        char a, b; fin >> a >> b;
        interzis[a - 'a'][b - 'a'] = interzis[b - 'a'][a - 'a'] = 1;
    }
    for(int i=0; i<26; i++) dp[1][i] = 1;
    for(int i=2; i<=n; i++) {
        for(int j=0; j<26; j++) {
            dp[i][j] = 0;
            for(int k=0; k<26; k++) {
                if(!interzis[j][k]) {
                    dp[i][j] += dp[i - 1][k];
                    if(dp[i][j] >= MOD) dp[i][j] -= MOD;
                }
            }
        }
    }
    int sum = 0;
    for(int i=0; i<26; i++) {
        sum += dp[n][i];
        if(sum >= MOD) sum -= MOD;
    }
    fout << sum;

    return 0;
}