#include <bits/stdc++.h>
#define N 2001
using namespace std;
int dp[N][N];
int w1[N], w2[N];
int n, p, q;
vector<int> a;
bool ok(int w){
for(int i = 0; i <= n; i++) for(int j = 0; j <= n; j++) dp[i][j] = (1 << 30); dp[0][0] = 0;
for(int j = 0; j <= q; j++){
int w1 = 0, w2 = 0;
for(int i = j + 1; i <= n; i++){
while(w1 < n && a[w1] <= a[i - 1] - w) w1++;
while(w2 < n && a[w2] <= a[i - 1] - w * 2) w2++;
if(j > 0) dp[i][j] = min(dp[i][j], dp[w2][j - 1]);
dp[i][j] = min(dp[i][j], dp[w1][j] + 1);
}
for(int i = 1; i <= n; i++) dp[i][j + 1] = min(dp[i][j], dp[i][j + 1]);
}
bool ret = false;
for(int j = 0; j <= q; j++) ret |= dp[n][j] <= p - j;
return ret;
}
int main(){
cin >> n >> p >> q;
p += q;
p = min(n, p); q = min(n / 2, q);
for(int i = 0; i < n; i++){
int v; cin >> v;
a.push_back(v);
}
sort(a.begin(), a.end());
vector<int> d;
for(int i = 0; i < n; i++){
for(int j = i + 1; j < n; j++){
d.push_back(a[j] - a[i]);
d.push_back((a[j] - a[i]) / 2 + 1);
}
}
sort(d.begin(), d.end());
d.resize(unique(d.begin(), d.end()) - d.begin());
int l, r;
for(l = 0, r = d.size(); l != r;){
int m = (l + r) / 2;
if(ok(d[m])){
r = m;
}else{
l = m + 1;
}
}
cout << d[l] << endl;
}
Compilation message
watching.cpp: In function 'bool ok(int)':
watching.cpp:11:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
11 | for(int i = 0; i <= n; i++) for(int j = 0; j <= n; j++) dp[i][j] = (1 << 30); dp[0][0] = 0;
| ^~~
watching.cpp:11:80: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
11 | for(int i = 0; i <= n; i++) for(int j = 0; j <= n; j++) dp[i][j] = (1 << 30); dp[0][0] = 0;
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
852 KB |
Output is correct |
| 2 |
Runtime error |
1 ms |
340 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
376 ms |
31748 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
