样例就错了，没调懂

#include<bits/stdc++.h>
using namespace std;
int b[55][55];
int ans[55][55];
int main() {
	int n, m;
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> b[i][j];
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
			for (int x = 1; x <= n; x++) {
				for (int y = 1; y <= m; y++) {
					if (b[i][j] == b[x][y])
						ans[i][j] = max(ans[i][j], (i - x) * (i - x) + (j - y) * (j - y));
				}
			}
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cout << ans[i][j] << ' ';
		}
		cout << endl;
	}
	return 0;
}