#include <bits/stdc++.h>
using namespace std;
struct tnut{
    int x,y,price;
}a[404];
bool cmp(tnut x,tnut y){
    return x.price>y.price;
}
int main(){
    int n,m,k,cnt=0;
    cin>>n>>m>>k;
    int tmp;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            cin>>tmp;
            if(tmp>0){
                a[cnt].x=i;
                a[cnt].y=j;
                a[cnt].price=tmp;
                cnt++;
            }
        }
    }
    sort(a,a+cnt,cmp);
    //for(int i=0;i<cnt;i++)cout<<a[i].x<<" "<<a[i].y<<" "<<a[i].price<<" "<<endl;
    //cout<<endl;
    k--;
    int ans=0;
    for(int i=0;i<cnt;i++){
        int len=0,len2=0;
        if(i==0){len=a[i].x+1;len2=a[i].x;}
        else {
            len+=abs(a[i].x-a[i-1].x);
            len+=abs(a[i].y-a[i-1].y)+1;
            len2=a[i].y+1;
            //len+=len2;
        }

        if(k-len-len2>0){
            k-=len;ans+=a[i].price;
            //cout<<i<<" "<<a[i].x<<" "<<a[i].y<<" "<<a[i].price<<" "<<k<<" "<<ans<<endl;
        }
        else {
            cout<<ans<<endl;
            return 0;
        }
    }
    cout<<ans<<endl;
    return 0;
}

为什么7和10会不过啊