File size: 561 Bytes
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#include <iostream>
using namespace std;
int N, M, A, B;
void solve() {
cin >> N >> M >> A >> B;
A -= N + M - 2;
B -= N + M - 2;
if (A < 1 || B < 1) {
cout << "Impossible" << endl;
return;
}
cout << "Possible" << endl;
for (int i = 0; i < N; i++) {
for (int j = 0; j < M; j++) {
int ans = (!i && !j) ? A : (!i && j == M - 1) ? B : 1;
cout << ans << (j < M - 1 ? ' ' : '\n');
}
}
}
int main() {
int T;
cin >> T;
for (int t = 1; t <= T; t++) {
cout << "Case #" << t << ": ";
solve();
}
return 0;
}
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