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답안 #638330

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
638330 2022-09-05T12:11:55 Z shmad Feast (NOI19_feast) C++17
12 / 100
 189 ms 12140 KB 
#pragma GCC optimize("O3", "unroll-loops") // "Ofast" 	
#pragma GCC target("avx2", "bmi", "bmi2", "lzcnt", "popcnt") 

#include <bits/stdc++.h>

//#define int long long
#define vt vector
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define ff first
#define ss second
#define dbg(x) cerr << #x << " = " << x << '\n'
#define bit(x, i) ((x) >> (i) & 1)

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vvt = vt< vt<int> >;

const int N = 1e6 + 5, mod = 1e9 + 7, B = 500;
const ll inf = 1e18 + 7, LIM = (1ll << 60);
const double eps = 1e-6;

int n, k, l[N], r[N];
ll a[N], b[N];

void solve () {
	cin >> n >> k;
	for (int i = 1; i <= n; i++) cin >> a[i];
	int m = 0;
	for (int i = 1; i <= n; i++) {
		if (i == 1) {
			b[++m] = a[i];
			continue;
		}
		if ((a[i] > 0 && b[m] > 0) || (a[i] < 0 && b[m] < 0)) b[m] += a[i];
		else b[++m] = a[i];
	}
	if (b[m] < 0) b[m--] = 0;
	multiset<pii> s;
	int cnt = 0;
	for (int i = 1; i <= m; i++) {
		s.insert({abs(b[i]), i});
		l[i] = i - 1;
		r[i] = i + 1;
		cnt += (b[i] > 0);    
	}
	r[m] = 0;
	while (!s.empty() && cnt > k) {
		pii v = *s.begin();
		s.erase(s.begin());
		int val = v.ff, i = v.ss;
		if (b[i] > 0) cnt--;
		if (l[i] != 0) {
			s.erase({abs(b[l[i]]), l[i]});
			if (b[l[i]] > 0) cnt--;
			b[i] += b[l[i]];
		    l[i] = l[l[i]];
		    if (l[i] != 0) r[l[i]] = i;
		}
		if (r[i] != 0) {
			s.erase({abs(b[r[i]]), r[i]});
			if (b[r[i]] > 0) cnt--;
			b[i] += b[r[i]];
			r[i] = r[r[i]];
			if (r[i] != 0) l[r[i]] = i;
		}
		if (b[i] > 0) {
			s.insert({abs(b[i]), i});
			cnt++;
			continue;
		}
		if (l[i] == 0) l[r[i]] = 0;
		else if (r[i] == 0) r[l[i]] = 0;		
		else s.insert({abs(b[i]), i});
	}
	ll ans = 0;
	for (auto [val, i]: s) if (b[i] > 0) ans += b[i];
	cout << ans;
	cout << '\n';
}

bool testcases = 0;

signed main() {
#ifdef ONLINE_JUDGE
	freopen(".in", "r", stdin);
	freopen(".out", "w", stdout);
#endif
	cin.tie(0) -> sync_with_stdio(0);
	int test = 1;
	if (testcases) cin >> test;
	for (int cs = 1; cs <= test; cs++) {
		solve();
	}
}

Compilation message

feast.cpp: In function 'void solve()':
feast.cpp:53:7: warning: unused variable 'val' [-Wunused-variable]
   53 |   int val = v.ff, i = v.ss;
      |       ^~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 2852 KB Output is correct
2 Correct 32 ms 5412 KB Output is correct
3 Correct 35 ms 5576 KB Output is correct
4 Correct 35 ms 5440 KB Output is correct
5 Correct 32 ms 5452 KB Output is correct
6 Correct 36 ms 5320 KB Output is correct
7 Correct 33 ms 5324 KB Output is correct
8 Correct 29 ms 5508 KB Output is correct
9 Correct 28 ms 5352 KB Output is correct
10 Correct 36 ms 5368 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 2924 KB Output is correct
2 Correct 24 ms 3812 KB Output is correct
3 Correct 20 ms 3736 KB Output is correct
4 Correct 19 ms 3788 KB Output is correct
5 Correct 27 ms 5324 KB Output is correct
6 Correct 18 ms 3748 KB Output is correct
7 Correct 19 ms 3800 KB Output is correct
8 Correct 29 ms 5492 KB Output is correct
9 Correct 35 ms 5388 KB Output is correct
10 Correct 18 ms 3732 KB Output is correct

Subtask #3
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 189 ms 12140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 2852 KB Output is correct
2 Correct 32 ms 5412 KB Output is correct
3 Correct 35 ms 5576 KB Output is correct
4 Correct 35 ms 5440 KB Output is correct
5 Correct 32 ms 5452 KB Output is correct
6 Correct 36 ms 5320 KB Output is correct
7 Correct 33 ms 5324 KB Output is correct
8 Correct 29 ms 5508 KB Output is correct
9 Correct 28 ms 5352 KB Output is correct
10 Correct 36 ms 5368 KB Output is correct
11 Correct 23 ms 2924 KB Output is correct
12 Correct 24 ms 3812 KB Output is correct
13 Correct 20 ms 3736 KB Output is correct
14 Correct 19 ms 3788 KB Output is correct
15 Correct 27 ms 5324 KB Output is correct
16 Correct 18 ms 3748 KB Output is correct
17 Correct 19 ms 3800 KB Output is correct
18 Correct 29 ms 5492 KB Output is correct
19 Correct 35 ms 5388 KB Output is correct
20 Correct 18 ms 3732 KB Output is correct
21 Incorrect 189 ms 12140 KB Output isn't correct
22 Halted 0 ms 0 KB -