# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
545651 |
2022-04-05T05:47:17 Z |
balbit |
Feast (NOI19_feast) |
C++14 |
|
157 ms |
14908 KB |
#include <bits/stdc++.h>
#define int ll
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<ll, ll>
#define MX(a,b) a=max(a,b)
#define MN(a,b) a=min(a,b)
#define SZ(x) (int)(x).size()
#define ALL(x) (x).begin(), (x).end()
#define REP(i,n) for (int i = 0; i<n; ++i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)
#define pb push_back
#ifdef BALBIT
#define bug(...) cerr<<"#"<<__LINE__<<": "<<#__VA_ARGS__<<"- ", _do(__VA_ARGS__)
template<typename T> void _do( T && x) {cerr<<x<<endl;}
template<typename T, typename ...S> void _do( T && x, S && ...y) {cerr<<x<<", "; _do(y...);}
#else
#define bug(...)
#define endl '\n'
#endif // BALBIT
const int maxn = 3e5+5;
const ll inf = 1ll<<61;
ll A[maxn];
pii dp[maxn][2];
int n;
pair<ll, ll> operator + (pair<ll, ll> a, pair<ll, ll> b) {
return {a.f + b.f, a.s + b.s};
}
pair<ll, ll> get(int p) {
// beware of initial states!!
dp[0][0] = {0, 0}; // no value, nothing taken yet
dp[0][1] = {-inf, -inf};
REP1(i,n) {
dp[i][0] = dp[i][1] = {-inf, -inf};
MX(dp[i][0], dp[i-1][0]); // continue not taking anything
MX(dp[i][0], dp[i-1][0] + make_pair(p, 1)); // take an empty segment (?)
MX(dp[i][0], dp[i-1][1]); // stop taking stuff
MX(dp[i][1], dp[i-1][0] + make_pair(p + A[i], 1));
MX(dp[i][1], dp[i-1][1] + make_pair(p + A[i], 1));
MX(dp[i][1], dp[i-1][1] + make_pair(A[i], 0));
}
return max(dp[n][0], dp[n][1]);
}
inline ll DIV(ll a, ll b) {
return a/b - ((a%b) && ((a^b)<0));
}
signed main(){
ios::sync_with_stdio(0), cin.tie(0);
bug(1,2);
int k; cin>>n>>k;
REP1(i,n) {
cin>>A[i];
}
ll l = -2e9-10, r = 2e9+10;
while (l!=r) {
ll md = DIV((l+r),2);
pair<ll, ll> gt = get(md);
if (gt.s >= k) {
// taking too many zones, gotta make the range smaller
r = md;
}else{
l = md+1;
}
}
pair<ll, ll> gt = get(l);
// only linear difference from it
bug(l, gt.f, gt.s);
ll re = gt.f + (gt.s) * (-l);
cout<<re<<endl;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
116 ms |
14480 KB |
Output is correct |
2 |
Correct |
103 ms |
14732 KB |
Output is correct |
3 |
Correct |
109 ms |
14908 KB |
Output is correct |
4 |
Correct |
113 ms |
14828 KB |
Output is correct |
5 |
Correct |
105 ms |
14732 KB |
Output is correct |
6 |
Correct |
98 ms |
14492 KB |
Output is correct |
7 |
Correct |
113 ms |
14456 KB |
Output is correct |
8 |
Correct |
105 ms |
14672 KB |
Output is correct |
9 |
Correct |
97 ms |
14472 KB |
Output is correct |
10 |
Correct |
107 ms |
14668 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
115 ms |
12880 KB |
Output is correct |
2 |
Correct |
107 ms |
13160 KB |
Output is correct |
3 |
Correct |
109 ms |
12852 KB |
Output is correct |
4 |
Correct |
107 ms |
12952 KB |
Output is correct |
5 |
Correct |
108 ms |
14496 KB |
Output is correct |
6 |
Correct |
106 ms |
12848 KB |
Output is correct |
7 |
Correct |
120 ms |
13188 KB |
Output is correct |
8 |
Correct |
114 ms |
14848 KB |
Output is correct |
9 |
Correct |
102 ms |
14452 KB |
Output is correct |
10 |
Correct |
94 ms |
13092 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
157 ms |
14864 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
116 ms |
14480 KB |
Output is correct |
2 |
Correct |
103 ms |
14732 KB |
Output is correct |
3 |
Correct |
109 ms |
14908 KB |
Output is correct |
4 |
Correct |
113 ms |
14828 KB |
Output is correct |
5 |
Correct |
105 ms |
14732 KB |
Output is correct |
6 |
Correct |
98 ms |
14492 KB |
Output is correct |
7 |
Correct |
113 ms |
14456 KB |
Output is correct |
8 |
Correct |
105 ms |
14672 KB |
Output is correct |
9 |
Correct |
97 ms |
14472 KB |
Output is correct |
10 |
Correct |
107 ms |
14668 KB |
Output is correct |
11 |
Correct |
115 ms |
12880 KB |
Output is correct |
12 |
Correct |
107 ms |
13160 KB |
Output is correct |
13 |
Correct |
109 ms |
12852 KB |
Output is correct |
14 |
Correct |
107 ms |
12952 KB |
Output is correct |
15 |
Correct |
108 ms |
14496 KB |
Output is correct |
16 |
Correct |
106 ms |
12848 KB |
Output is correct |
17 |
Correct |
120 ms |
13188 KB |
Output is correct |
18 |
Correct |
114 ms |
14848 KB |
Output is correct |
19 |
Correct |
102 ms |
14452 KB |
Output is correct |
20 |
Correct |
94 ms |
13092 KB |
Output is correct |
21 |
Incorrect |
157 ms |
14864 KB |
Output isn't correct |
22 |
Halted |
0 ms |
0 KB |
- |