Cow Gymnastics

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

int arr[15][25];

int check[25];

void solve(){
    int k,n;
    scanf("%d %d",&k,&n);

    for(int i=1;i<=k;i++){
        for(int j=1;j<=n;j++){
            scanf("%d",&arr[i][j]);
        }
    }

    int ans=0;

    for(int x=1;x<=n;x++){
        memset(check,0,sizeof(check));
        for(int i=1;i<=k;i++){
            bool flag=0;
            for(int j=1;j<=n;j++){

                if(flag==1){
                    check[arr[i][j]]++;
                }

                if(arr[i][j]==x) flag=1;
            }
        }
        for(int i=1;i<=n;i++){
            if(i==x) continue;

            if(check[i]==k)ans++;
        }
    }

    printf("%d\n",ans);
}

int main()
{
    freopen("gymnastics.in", "r", stdin);
    freopen("gymnastics.out", "w", stdout);
    int tc=1;
    //scanf("%d",&tc);

    while(tc--){
        solve();
    }
}