#include<bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
using namespace std;
typedef long long int;
int n, p, q;
int a[2001];
int dp[2001][2001]; // Max position you can get up to with at most i smaint and j big
// You clearly need at most N cameras
bool assign(int w) {
dp[0][0] = 0;
int ii = 1 , jj = 1;
FOR(i, 1, n + 1) {
while (a[i] - a[ii] + 1 > w) ii++;
while (a[i] - a[jj] + 1 > 2 * w) jj++;
FOR(j, 0, min(i, p) + 1) {
if (j == 0) dp[i][j] = dp[jj - 1][j] + 1;
else dp[i][j] = min(dp[jj - 1][j] + 1, dp[ii - 1][j - 1]), dp[i][j] = min(dp[i][j], dp[i][j - 1]);
}
}
return dp[n][min(p, n)] <= q;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n >> p >> q;
FOR(i, 1, n + 1) cin >> a[i];
sort(a + 1, a + n + 1);
fill_n(&dp[0][0], 2001 * 2001, q + 1);
int l = 1, r = 1e9;
while (l != r) {
// cout << l << ' ' << r << endl;
int mid = (l + r) >> 1;
if (assign(mid)) r = mid - 1;
else l = mid + 1;
}
cout << l << '\n';
return 0;
}
Compilation message
watching.cpp:4:19: error: declaration does not declare anything [-fpermissive]
typedef long long int;
^~~
