#include<bits/stdc++.h> #define VAR(i,n) __typeof(n) i = (n) #define loop(i,j,s) for(int i=j;i<s;i++) #define loopback(i,j,s) for(int i=j;i>=s;i--) #define foreach(i,c) for(VAR(i,(c).begin());i!=(c).end();i++) #define pln( x ) cout << x << "\n" #define ps( x ) cout << x << " " #define entr cout << "\n" #define pcnt(i) __builtin_popcount(i) #define ll long long #define pb push_back #define mp make_pair #define ff first #define ss second #define SIZE(c) (c).size() #define ALL(c) (c).begin(), (c).end() using namespace std; typedef vector<int> VI; const int INFTY=20000000; const int MAX=1100; const int MOD=10000000; void coutTab(int* tab,int n){ loop(i,0,n){ cout<<tab[i]<<" "; } cout<<"\n"; } //------------------------------------------ int dp[MAX][MAX]; int min(vector<int> per){ vector<int> tmp; int k=0; while(per.size()!=1){ k++; tmp.clear(); if(per[0]>per[1]) tmp.pb(per[0]); loop(i,1,per.size()-1){ if(per[i]>per[i-1]&&per[i]>per[i+1]){ tmp.pb(per[i]); } } if(per[per.size()-1]>per[per.size()-2]) tmp.pb(per[per.size()-1]); per.clear(); for(auto j : tmp){ per.pb(j); } } return k; } int main(){ ios_base::sync_with_stdio(0); int n,k; ll p; cin>>n>>k>>p; if(k>10){ pln(0); return 0; } dp[1][0]=1; vector<int> perm; //loop(i,2,n+1){ ll cnt = 0; perm.clear(); loop(j,0,n) perm.pb(j); do{ //dp[i][min(perm)]++; if(min(perm)==k) cnt++; }while(next_permutation(ALL(perm))); //} /*loop(i,1,n+1){ loop(j,0,7){ ps(dp[i][j]); } entr; }*/ pln(cnt%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 VAR(i,n) __typeof(n) i = (n) #define loop(i,j,s) for(int i=j;i<s;i++) #define loopback(i,j,s) for(int i=j;i>=s;i--) #define foreach(i,c) for(VAR(i,(c).begin());i!=(c).end();i++) #define pln( x ) cout << x << "\n" #define ps( x ) cout << x << " " #define entr cout << "\n" #define pcnt(i) __builtin_popcount(i) #define ll long long #define pb push_back #define mp make_pair #define ff first #define ss second #define SIZE(c) (c).size() #define ALL(c) (c).begin(), (c).end() using namespace std; typedef vector<int> VI; const int INFTY=20000000; const int MAX=1100; const int MOD=10000000; void coutTab(int* tab,int n){ loop(i,0,n){ cout<<tab[i]<<" "; } cout<<"\n"; } //------------------------------------------ int dp[MAX][MAX]; int min(vector<int> per){ vector<int> tmp; int k=0; while(per.size()!=1){ k++; tmp.clear(); if(per[0]>per[1]) tmp.pb(per[0]); loop(i,1,per.size()-1){ if(per[i]>per[i-1]&&per[i]>per[i+1]){ tmp.pb(per[i]); } } if(per[per.size()-1]>per[per.size()-2]) tmp.pb(per[per.size()-1]); per.clear(); for(auto j : tmp){ per.pb(j); } } return k; } int main(){ ios_base::sync_with_stdio(0); int n,k; ll p; cin>>n>>k>>p; if(k>10){ pln(0); return 0; } dp[1][0]=1; vector<int> perm; //loop(i,2,n+1){ ll cnt = 0; perm.clear(); loop(j,0,n) perm.pb(j); do{ //dp[i][min(perm)]++; if(min(perm)==k) cnt++; }while(next_permutation(ALL(perm))); //} /*loop(i,1,n+1){ loop(j,0,7){ ps(dp[i][j]); } entr; }*/ pln(cnt%p); } |