#include <bits/stdc++.h>
#define luk(n,m) for(int i=n; i<m; ++i)
#define maxn 1010
#define pb(n) push_back(n)
#define mp make_pair
#define inf 1000000000
#define mod 1000000007
#define mod1 1000696969
#define ff first.first
#define fs first.second
#define ll long long
using namespace std;
vector<int>v[2];
int tab[maxn];
int wynik,n,k;
bool spraw()
{
v[0].clear();
luk(0,n)
v[0].pb(tab[i]);
int x=1,y=0;
while((int)v[x^1].size()!=1)
{
v[x].clear();
int s=(int)v[x^1].size();
luk(0,s)
{
if(i==0)
{
if(v[x^1][i]>v[x^1][i+1])
v[x].pb(v[x^1][i]);
}
else
{
if(i==s-1)
{
if(v[x^1][i]>v[x^1][i-1])
v[x].pb(v[x^1][i]);
}
else
{
if(v[x^1][i]>v[x^1][i-1]&&v[x^1][i]>v[x^1][i+1])
v[x].pb(v[x^1][i]);
}
}
}
++y;
x=x^1;
}
return y==k;
}
int main()
{
int p;
scanf("%d%d%d", &n, &k, &p);
luk(0,n)
{
tab[i]=i+1;
}
do
{
if(spraw())
++wynik;
}while(next_permutation(tab, tab+n));
printf("%d", wynik%p);
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | #include <bits/stdc++.h> #define luk(n,m) for(int i=n; i<m; ++i) #define maxn 1010 #define pb(n) push_back(n) #define mp make_pair #define inf 1000000000 #define mod 1000000007 #define mod1 1000696969 #define ff first.first #define fs first.second #define ll long long using namespace std; vector<int>v[2]; int tab[maxn]; int wynik,n,k; bool spraw() { v[0].clear(); luk(0,n) v[0].pb(tab[i]); int x=1,y=0; while((int)v[x^1].size()!=1) { v[x].clear(); int s=(int)v[x^1].size(); luk(0,s) { if(i==0) { if(v[x^1][i]>v[x^1][i+1]) v[x].pb(v[x^1][i]); } else { if(i==s-1) { if(v[x^1][i]>v[x^1][i-1]) v[x].pb(v[x^1][i]); } else { if(v[x^1][i]>v[x^1][i-1]&&v[x^1][i]>v[x^1][i+1]) v[x].pb(v[x^1][i]); } } } ++y; x=x^1; } return y==k; } int main() { int p; scanf("%d%d%d", &n, &k, &p); luk(0,n) { tab[i]=i+1; } do { if(spraw()) ++wynik; }while(next_permutation(tab, tab+n)); printf("%d", wynik%p); } |
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