#include<bits/stdc++.h>
using namespace std;
int main(){
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int n, m, k;
cin >> n >> m >> k;
int a[n + 1];
memset(a, 0, sizeof(a));
for(int i = 1; i <= m; i++){
int x;
cin >> x;
a[max(0, x - k)] += 1;
a[min(n, x + k + 1)] -= 1;
}
int cur = 0, ans = 0;
for(int i = 0; i < n; i++){
cur += a[i];
if(cur == 0){
ans += 1;
cur += 1;
a[min(n, i + 2 * k + 1)] -= 1;
}
}
cout << ans;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
384 KB |
Output is correct |
2 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
3 |
Correct |
2 ms |
384 KB |
Output is correct |
4 |
Correct |
2 ms |
384 KB |
Output is correct |
5 |
Correct |
3 ms |
384 KB |
Output is correct |
6 |
Correct |
3 ms |
384 KB |
Output is correct |
7 |
Correct |
2 ms |
384 KB |
Output is correct |
8 |
Correct |
2 ms |
256 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |