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#include "bits/stdc++.h"

using namespace std;
#define PB push_back
#define LL long long
#define int LL
#define FOR(i,a,b) for (int i = (a); i <= (b); i++)
#define FORD(i,a,b) for (int i = (a); i >= (b); i--)
#define REP(i,n) FOR(i,0,(int)(n)-1)
#define st first
#define nd second
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) ((int)(x).size())
#define VI vector<int>
#define PII pair<int,int>
#define LD long double

template<class C> void mini(C& a4, C b4) { a4 = min(a4, b4); }
template<class C> void maxi(C& a4, C b4) { a4 = max(a4, b4); }

template<class TH> void _dbg(const char *sdbg, TH h){cerr<<sdbg<<"="<<h<<"\n";}
template<class TH, class... TA> void _dbg(const char *sdbg, TH h, TA... a) {
  while(*sdbg!=',')cerr<<*sdbg++;
  cerr<<"="<<h<<","; _dbg(sdbg+1, a...);
}

template<class T> ostream &operator<<(ostream &os, vector<T> V){
  os<<"[";for(auto vv:V)os<<vv<<",";return os<<"]";
} 

template<class L, class R> ostream &operator<<(ostream &os, pair<L,R> P) {
  return os << "(" << P.st << "," << P.nd << ")";
}


#ifdef LOCAL
#define debug(...) _dbg(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (__VA_ARGS__)
#define cerr if(0)cout
#endif

int mod;

void add(int & a, int b){
    a += b;
    if(a >= mod){
        a -= mod;
    }
}

void sub(int & a, int b){
    a -= b;
    if(a < 0)
        a += mod;
}

void mul(int & a, int b){
    a *= b;
    a %= mod;
}

int prod(int a, int b){
    mul(a,b);
    return a;
}

int plus_m(int a, int b){
    add(a,b);
    return a;
}

int minus_m(int a, int b){
    sub(a,b);
    return a;
}

int neg(int a){
    return minus_m(0, a);
}


struct IntervalSum{
    VI t;
    IntervalSum(int n){
        t.resize(n + 1);
    }
    void add_interval(int v, int l, int r){
        if(r < l)
            return;
        add(t[l], v);
        sub(t[r + 1], v);
    }
    void propagate(){
        FOR(i, 1, SZ(t) - 1){
            add(t[i], t[i - 1]);
        }
    }
};

struct Solution{
    int n,m;
    Solution(){
        cin >> n >> m >> mod;
    }
    
    int solve(){
        VI ext(m);
        VI nonext(m, 1);
        REP(_, n - 1){
            IntervalSum unit_ext(m);
            IntervalSum lin_ext(m);
            IntervalSum unit_nonext(m);
            IntervalSum lin_nonext(m);            
            int a = 0;
            int b = m - 1;
            REP(i, m){
                // ext -> 
                unit_ext.add_interval(prod(ext[i], b + 1), 0, a - 1);
                add_lin(prod(ext[i], prod(a, b + 1)), prod(neg(a), ext[i]), i, m - 1, unit_nonext, lin_nonext);
                add_lin(prod(ext[i], b + 1), prod(b + 1, ext[i]), 0, i - 1, unit_nonext, lin_nonext);
                
                // nonext ->
                unit_ext.add_interval(prod(nonext[i], b + 1), i, i);
                add_lin(prod(b + 1, nonext[i]), neg(nonext[i]), i, m - 1, unit_nonext, lin_nonext);
                a++;
                b--;
            }

            apply(ext, unit_ext, lin_ext);
            apply(nonext, unit_nonext, lin_nonext);
        }
        int res = 0;
        int a = 0;
        int b = m - 1;
        REP(i, m){
            add(res, prod(ext[i], prod(a, b + 1)));
            add(res, prod(nonext[i], b + 1));
            a++;
            b--;
        }
        return res;
    }
    void add_lin(int start, int deriv, int l, int r, IntervalSum & unit, IntervalSum & lin){
        lin.add_interval(deriv, l, r);
        // now val at l == deriv * l
        // should be start
        // we need to sub deriv * l - start
        // we need to add start - deriv * l
        unit.add_interval(minus_m(start, prod(deriv, l)), l, r);
    }
    void apply(VI & v, IntervalSum & unit, IntervalSum lin){
        unit.propagate();
        lin.propagate();
        REP(i, m){
            v[i] = plus_m(unit.t[i], prod(lin.t[i], i));
        }
    }
};

int32_t main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout << fixed << setprecision(11);
  cerr << fixed << setprecision(6);
  cout << Solution().solve() << "\n";
}