#include "prison.h"
#include <vector>
using namespace std;
#define ll long long
vector<vector<int>> devise_strategy(int N) {
vector<vector<int>> v(60, vector<int>(N+1, 0));
for (int i = 1; i <= N; i++) {
if (i/10 > 0)
v[0][i] = i/10;
else
v[0][i] = i;
}
for (int i = 1; i < 60; i++) {
v[i][0] = 1;
for (int j = 1; j <= N; j++) {
int k = j;
if (j/10 > 0)
k /= 10;
if (k < i)
v[i][j] = -2;
else
v[i][j] = -1;
}
}
return v;
}
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