维护好二维前缀和sum后,所有可能的 sum[i][m] 和 sum[n][i] 就是小美拥有的,而 sum[n][m] 减去小美拥有的就是小团拥有的,遍历所有可能性,维护好最小的二者的差的绝对值即可

#include <bits/stdc++.h>
using namespace std;
#define int long long
int __t = 1, n, m;
void solve() {
    cin >> n >> m;
    vector<vector<int>> a(n + 1, vector<int>(m + 1, 0)),
        sum(n + 1, vector<int>(m + 1, 0));
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++) {
            cin >> a[i][j];
            sum[i][j] =
                a[i][j] + sum[i - 1][j] + sum[i][j - 1] - sum[i - 1][j - 1];
        }
    int ans = sum[n][m];
    for (int i = 1; i < n; i++)
        ans = min(abs(sum[n][m] - 2 * sum[i][m]), ans);
    for (int i = 1; i < m; i++)
        ans = min(abs(sum[n][m] - 2 * sum[n][i]), ans);
    cout << ans << '\n';
}
int32_t main() {
#ifdef ONLINE_JUDGE
    ios::sync_with_stdio(false);
    cin.tie(0);
#endif
    // cin >> __t;
    while (__t--)
        solve();
    return 0;
}