#include <bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
using namespace std;
typedef long long ll;
typedef pair <ll, ll> pii;
const ll NMAX = 300001;
const ll nr_of_bits = 16;
const ll MOD = 1000000007;
ll cnt[NMAX][2];
ll dp[NMAX][2];
ll n, k;
ll v[NMAX];
pii OK(ll cost){
for(ll i = 1; i <= n; i++){
if(dp[i - 1][1] - cost > dp[i - 1][0]){
cnt[i][0] = cnt[i - 1][1] + 1;
dp[i][0] = dp[i - 1][1] - cost;
}else{
cnt[i][0] = cnt[i - 1][0];
dp[i][0] = dp[i - 1][0];
}
if(dp[i - 1][1] > dp[i - 1][0]){
cnt[i][1] = cnt[i - 1][1];
dp[i][1] = dp[i - 1][1] + v[i];
}else{
cnt[i][1] = cnt[i - 1][0];
dp[i][1] = dp[i - 1][0] + v[i];
}
}
ll cfinal, dfinal;
if(dp[n][1] - cost > dp[n][0]){
dfinal = dp[n][1] - cost;
cfinal = cnt[n][1] + 1;
}else{
dfinal = dp[n][0];
cfinal = cnt[n][0];
}
return {dfinal + cost * k, cfinal};
}
int main() {
//ifstream cin(".in");
//ofstream cout(".out");
ll i;
cin >> n;
cin >> k;
for(i = 1; i <= n; i++){
cin >> v[i];
}
ll r = 0, pas = (1 << 30);
while(pas){
if(OK(r + pas).second > k)
r += pas;
pas /= 2;
}
if(OK(r).second > k)
r++;
cout << OK(r).first;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
162 ms |
11588 KB |
Output is correct |
2 |
Correct |
185 ms |
14732 KB |
Output is correct |
3 |
Correct |
172 ms |
14916 KB |
Output is correct |
4 |
Correct |
168 ms |
14724 KB |
Output is correct |
5 |
Correct |
164 ms |
14648 KB |
Output is correct |
6 |
Correct |
165 ms |
14468 KB |
Output is correct |
7 |
Correct |
165 ms |
14416 KB |
Output is correct |
8 |
Correct |
164 ms |
14668 KB |
Output is correct |
9 |
Correct |
175 ms |
14388 KB |
Output is correct |
10 |
Correct |
161 ms |
14636 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
109 ms |
12212 KB |
Output is correct |
2 |
Correct |
110 ms |
13104 KB |
Output is correct |
3 |
Correct |
106 ms |
12732 KB |
Output is correct |
4 |
Correct |
110 ms |
12860 KB |
Output is correct |
5 |
Correct |
162 ms |
14644 KB |
Output is correct |
6 |
Correct |
106 ms |
12756 KB |
Output is correct |
7 |
Correct |
108 ms |
13124 KB |
Output is correct |
8 |
Correct |
162 ms |
14776 KB |
Output is correct |
9 |
Correct |
160 ms |
14404 KB |
Output is correct |
10 |
Correct |
107 ms |
13072 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
200 ms |
11804 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
162 ms |
11588 KB |
Output is correct |
2 |
Correct |
185 ms |
14732 KB |
Output is correct |
3 |
Correct |
172 ms |
14916 KB |
Output is correct |
4 |
Correct |
168 ms |
14724 KB |
Output is correct |
5 |
Correct |
164 ms |
14648 KB |
Output is correct |
6 |
Correct |
165 ms |
14468 KB |
Output is correct |
7 |
Correct |
165 ms |
14416 KB |
Output is correct |
8 |
Correct |
164 ms |
14668 KB |
Output is correct |
9 |
Correct |
175 ms |
14388 KB |
Output is correct |
10 |
Correct |
161 ms |
14636 KB |
Output is correct |
11 |
Correct |
109 ms |
12212 KB |
Output is correct |
12 |
Correct |
110 ms |
13104 KB |
Output is correct |
13 |
Correct |
106 ms |
12732 KB |
Output is correct |
14 |
Correct |
110 ms |
12860 KB |
Output is correct |
15 |
Correct |
162 ms |
14644 KB |
Output is correct |
16 |
Correct |
106 ms |
12756 KB |
Output is correct |
17 |
Correct |
108 ms |
13124 KB |
Output is correct |
18 |
Correct |
162 ms |
14776 KB |
Output is correct |
19 |
Correct |
160 ms |
14404 KB |
Output is correct |
20 |
Correct |
107 ms |
13072 KB |
Output is correct |
21 |
Incorrect |
200 ms |
11804 KB |
Output isn't correct |
22 |
Halted |
0 ms |
0 KB |
- |