#include<bits/stdc++.h>
#define MAXN 1000

int somaL[MAXN]; somaC[MAXN];
int m[MAXN][MAXN];

//O(n^2)
int main() {
    int n; scanf("%d", &n);

    for (int i = 0; i < n; i++){
        for(int j = 0; j < n; j++){
            scanf("%d", &m[i][j]);
            somaL[i] += m[i][j];
            somaC[j] += m[i][j];
        }
    }

    int peso = 0;
    for (int i = 0; i < n; i++){
        for(int j = 0; j < n; j++){
            int soma = somaL[i] + somaC[j] - 2*m[i][j];
            if(soma > peso){
                peso = soma;
            }
        }

    }
    printf("%d", peso);
}