Submission #1354755

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const ll MOD = 924844033;
ll fac[2100];
ll res;
int n, k;

vector<ll> prod(vector<ll> a, vector<ll> b) {
    int i,j;
    vector<ll> c(n+1,0);
    for (i=0;i<=n;i++) {
        for (j=0;j<=i;j++) c[i] += (a[j]*b[i-j])%MOD;
        c[i] %= MOD;
    }
    return c;
}

vector<ll> power(vector<ll> a, int p) {
    if (p==0) {
        vector<ll> tmp(n+1,0);
        tmp[0] = 1;
        return tmp;
    }
    vector<ll> tmp = power(a,p/2);
    vector<ll> nmp = prod(tmp,tmp);
    if (p&1) return prod(nmp,a);
    return nmp;
}

ll dyn[2100][2100];

vector<ll> calc(int p) {
    int i, j;
    memset(dyn,0,sizeof(dyn));
    dyn[0][0] = dyn[0][1] = dyn[1][0] = 1;
    dyn[1][1] = 2;
    for (i=2;i<p;i++) {
        dyn[i][0] = 1;
        for (j=1;j<=i/2+1;j++) {
            dyn[i][j] = (dyn[i-1][j]+dyn[i-2][j-1])%MOD;
        }
    }
    vector<ll> ad(n+1,0);
    for (i=0;i<=n;i++) ad[i] = dyn[p-1][i];
    return ad;
}

int main() {
    int i;

    fac[0] = 1;
    for (i=1;i<=2010;i++) fac[i] = (fac[i-1]*i)%MOD;
    scanf("%d%d",&n,&k);
    int s = 1, p, q, a, b;
    p = 2*(n-(n-1)/k*k); q = 2*min(k,n-k)-p;
    a = (n-1)/k; b = a-1;
    vector<ll> fd = prod(power(calc(a),p),power(calc(b),q));
    for (i=0;i<=n;i++) {
        res += (((s*fac[n-i])%MOD)*fd[i])%MOD;
        s = -s;
        res %= MOD;
    }
    res += MOD;
    res %= MOD;
    printf("%lld\n",res);


    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:57:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
                        ^

Judge Result