[DP]Hdu 5234 Happy birthday

This problem too much water,so there is code:

#include <iostream>
#include <cstring>
using namespace std;

const int MAXN=105;
int w[MAXN][MAXN];
int dp[MAXN][MAXN][MAXN];
int n,m,kk;
int max(int a,int b){
	if(a<b)return b;
	return a;
}

int main(){
	while(cin>>n>>m>>kk){
		//cout<<n<<" "<<m<<" "<<kk<<endl;
		memset(dp,0,sizeof dp);
		for(int i=1;i<=n;i++){
			for(int j=1;j<=m;j++){
				cin>>w[i][j];
			}
		}

		for(int i=1;i<=n;i++){
			for(int j=1;j<=m;j++){
				for(int k=kk;k>=0;k--){
					
					dp[i][j][k]=max(dp[i][j][k],max(dp[i-1][j][k],dp[i][j-1][k]));          
                    if(k>=w[i][j])
                    {
                        dp[i][j][k]=max(dp[i][j][k],dp[i-1][j][k-w[i][j]]+w[i][j]);
                        dp[i][j][k]=max(dp[i][j][k],dp[i][j-1][k-w[i][j]]+w[i][j]);
                    }
				}
			}
		}
		cout<<dp[n][m][kk]<<endl;
	}
}