#include<bits/stdc++.h> //:3
using namespace std;
typedef long long ll;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define pi pair<int, int>
#define sz(x) (int)((x).size())
#define int long long
const int dx[] = {0, 1, 0, -1};
const int dy[] = {1, 0, -1, 0};
const ll inf = 2e9;
const ll mod = 1e9 + 7;
const int N = 2e4 + 11;
const int X = 1e6;
const ll INF64 = 3e18 + 1;
const double eps = 1e-14;
const double PI = acos(-1);
//ifstream in(".in");
//ofstream out(".out");
int n, m, a[N], dp[N], S, B;
bool ok(int small, int big, int w){
memset(dp, 0x3f, sizeof(dp));
dp[0] = 0;
dp[1] = 1;
for(int i = 2; i <= n; i++){
for(int j = 1; j <= i; j++){
if(a[i] - a[j] >= w)continue;
dp[i] = min(dp[i], dp[j - 1] + 1);
}
}
//cout << "DP" << '\n';
//for(int i = 0; i <= n; i++)cout << dp[i] << ' '; cout << '\n';
int doi = 0;
for(int i = 2; i <= n; i++){
for(int j = 1; j < i; j++){
if(dp[i] - dp[j - 1] == 2 && a[i] - a[j] < 2*w){
doi++;
break;
}
}
}
//cout << "doi = " << doi << '\n';
if(dp[n] - doi*2 <= small)return 1;
return 0;
}
void solve(){
cin >> n >> S >> B;
for(int i = 1; i <= n; i++)cin >> a[i];
int l = 0, r = 1e9, ans = 0;
while(l <= r){
int mid = (l + r) >> 1;
if(ok(S, B, mid)){
ans = mid;
r = mid - 1;
}else l = mid + 1;
}
cout << ans << '\n';
}
int32_t main(){
ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
cout << setprecision(6) << fixed;
int T = 1;
//cin >> T;
while(T--){
solve();
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
512 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
255 ms |
512 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
