#include "bits/stdc++.h"
using namespace std;

#define rep(i, a, b) for(int i=a; i<=b; i++)
#define trav(a, x) for(auto& a : x)
#define all(x) begin(x), end(x)
#define sz(x) (int) x.size()
#define pb push_back
#define f first
#define s second
#define nl "\n"
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
const int MOD = 998244353;
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;

ll n, m, k;

ll bpow(ll a, ll b){
  if(b==0) return 1;
  ll y=bpow(a, b/2);
  y=(y*y)%MOD;
  if(b&1) y=(y*a)%MOD;
  return y;
}

int main(){
  ios::sync_with_stdio(false);
  cin.tie(0);
  // freopen("input.txt", "r", stdin); 
  // freopen("output.txt", "w", stdout);

  cin >> n >> m >> k;
  ll ans=0;
  if(n==1){
    cout << bpow(k, m); return 0;
  }
  rep(x, 1, k){
    ans=(ans+(((MOD+bpow(x, n)-bpow(x-1, n))%MOD)*((m==1?1:bpow(k-x+1, m))%MOD))%MOD)%MOD;
  }
  cout << ans;
}
//I'll always miss you like a darling.
#include <bits/stdc++.h>
using namespace std;

#define LL long long
#define LD long double
#define ull unsigned long long
#define x first
#define y second
#define pb push_back
#define pf push_front
#define mp make_pair
#define Pair pair<int,int>
#define pLL pair<LL,LL>
#define pii pair<double,double>
#define LOWBIT(x) x & (-x)

#define rep(i,a,b) for (int i=a;i<=b;i++)
#define REP(i,a,b) for (int i=a;i>=b;i--)

const int INF=2e9;
const LL LINF=2e16;
const int magic=348;
const int MOD=998244353;
const double eps=1e-10;
const double pi=acos(-1);

struct fastio
{
    static const int S=1e7;
    char rbuf[S+48],wbuf[S+48];int rpos,wpos,len;
    fastio() {rpos=len=wpos=0;}
    inline char Getchar()
    {
        if (rpos==len) rpos=0,len=fread(rbuf,1,S,stdin);
        if (!len) return EOF;
        return rbuf[rpos++];
    }
    template <class T> inline void Get(T &x)
    {
        char ch;bool f;T res;
        while (!isdigit(ch=Getchar()) && ch!='-') {}
        if (ch=='-') f=false,res=0; else f=true,res=ch-'0';
        while (isdigit(ch=Getchar())) res=res*10+ch-'0';
        x=(f?res:-res);
    }
    inline void getstring(char *s)
    {
        char ch;
        while ((ch=Getchar())<=32) {}
        for (;ch>32;ch=Getchar()) *s++=ch;
        *s='\0';
    }
    inline void flush() {fwrite(wbuf,1,wpos,stdout);fflush(stdout);wpos=0;}
    inline void Writechar(char ch)
    {
        if (wpos==S) flush();
        wbuf[wpos++]=ch;
    }
    template <class T> inline void Print(T x,char ch)
    {
        char s[20];int pt=0;
        if (x==0) s[++pt]='0';
        else
        {
            if (x<0) Writechar('-'),x=-x;
            while (x) s[++pt]='0'+x%10,x/=10;
        }
        while (pt) Writechar(s[pt--]);
        Writechar(ch);
    }
    inline void printstring(char *s)
    {
        int pt=1;
        while (s[pt]!='\0') Writechar(s[pt++]);
    }
}io;

template<typename T> inline void check_max(T &x,T cmp) {x=max(x,cmp);}
template<typename T> inline void check_min(T &x,T cmp) {x=min(x,cmp);}
template<typename T> inline T myabs(T x) {return x>=0?x:-x;}
template<typename T> inline T mygcd(T x,T y) {return y==0?x:mygcd(y,x%y);}
inline int add(int x) {if (x>=MOD) x-=MOD;return x;}
inline int add(int x,int MO) {if (x>=MO) x-=MO;return x;}
inline int sub(int x) {if (x<0) x+=MOD;return x;}
inline int sub(int x,int MO) {if (x<0) x+=MO;return x;}
inline void Add(int &x,int y) {x=add(x+y);}
inline void Add(int &x,int y,int MO) {x=add(x+y,MO);}
inline void Sub(int &x,int y) {x=sub(x-y);}
inline void Sub(int &x,int y,int MO) {x=sub(x-y,MO);}
template<typename T> inline int quick_pow(int x,T y) {int res=1;while (y) {if (y&1) res=1ll*res*x%MOD;x=1ll*x*x%MOD;y>>=1;}return res;}
template<typename T> inline int quick_pow(int x,T y,int MO) {int res=1;while (y) {if (y&1) res=1ll*res*x%MO;x=1ll*x*x%MO;y>>=1;}return res;}

const int MAXN=2e5;

int n,m,k;
int t1[MAXN+48],t2[MAXN+48],sum[MAXN+48];

int main ()
{
#ifndef ONLINE_JUDGE
    double TIME=clock();
    freopen ("a.in","r",stdin);
    freopen ("a.out","w",stdout);
    cerr<<"Running..."<<endl;
#endif
    cin>>n>>m>>k;
    t1[1]=1;
    rep(i,2,k) t1[i]=sub(quick_pow(i,n)-quick_pow(i-1,n));
    t2[k]=1;
    rep(i,1,k-1) t2[i]=sub(quick_pow(k-i+1,m)-quick_pow(k-i,m));
    sum[k]=t2[k];REP(i,k-1,1) sum[i]=add(sum[i+1]+t2[i]);
    int ans=0;
    if (n>=2 && m>=2)
        rep(i,1,k) Add(ans,1ll*t1[i]*sum[i]%MOD);
    else
        rep(i,1,k) Add(ans,1ll*t1[i]*t2[i]%MOD);
    printf("%d\n",ans);
#ifndef ONLINE_JUDGE
    cerr<<"Exec Time: "<<(clock()-TIME)/CLOCKS_PER_SEC<<endl;
#endif
    return 0;
}