Solution.java

class Solution {
    public long gridGame(int[][] grid) {
        long ans = Long.MAX_VALUE;
        long s1 = 0, s2 = 0;
        for (int v : grid[0]) {
            s1 += v;
        }
        int n = grid[0].length;
        for (int j = 0; j < n; ++j) {
            s1 -= grid[0][j];
            ans = Math.min(ans, Math.max(s1, s2));
            s2 += grid[1][j];
        }
        return ans;
    }
}