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33 lines
927 B
C++

#define _CRT_SECURE_NO_WARNINGS
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#include <bits/stdc++.h>
using namespace std;
int a[60][60], b[60][60];
void die(int v)
{
puts(v ? "Possible" : "Impossible");
exit(0);
}
int main()
{
int n, m;
scanf("%d%d", &n, &m);
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++)
scanf("%d", &a[i][j]);
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++)
scanf("%d", &b[i][j]);
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++)
if (a[i][j] > b[i][j])
swap(a[i][j], b[i][j]);
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++)
if (a[i - 1][j] >= a[i][j] || a[i][j - 1] >= a[i][j] ||
b[i - 1][j] >= b[i][j] || b[i][j - 1] >= b[i][j])
die(0);
die(1);
return 0;
}