Cod sursa(job #1580694)

Utilizator Burbon13Burbon13 Burbon13 Data 26 ianuarie 2016 00:30:20
Problema Lista lui Andrei Scor 20
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.99 kb
#include <cstdio>

using namespace std;

const int nmx = 1002;
const int crx = 30;
const int mod = 104659;

int n,m,dp[2][crx];
bool mat[crx][crx];

inline int toint(const char &c){
    return (int)c - 96;
}

int main(){
    freopen("nrcuv.in", "r", stdin);
    freopen("nrcuv.out", "w", stdout);

    scanf("%d %d\n", &n, &m);
    for(int i = 1; i <= m; ++i){
        char c1,c2;
        scanf("%c %c\n", &c1, &c2);
        mat[toint(c1)][toint(c2)] = true;
        mat[toint(c2)][toint(c1)] = true;
    }

    for(int i = 1; i <= 26; ++i)
        dp[0][i] = 1;

    bool pos = 1;

    for(int l = 2; l <= n; ++l){
        for(int i = 1; i <= 26; ++i)
            for(int j = 1; j <= 26; ++j)
                if(not mat[i][j])
                    dp[pos][i] = (dp[pos][i] + dp[pos^1][j]) % mod ;
        pos = pos ^ 1;
    }

    int sum = 0;

    for(int i = 1; i <= 26; ++i)
        sum = (sum + dp[pos^1][i]) % mod;

    printf("%d\n", sum);

    return 0;
}