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Submission #579155

# Submission time Handle Problem Language Result Execution time Memory
579155 2022-06-18T12:30:40 Z cheissmart Uplifting Excursion (BOI22_vault) C++14
20 / 100
 893 ms 636 KB 
#include <bits/stdc++.h>
#define IO_OP std::ios::sync_with_stdio(0); std::cin.tie(0);
#define F first
#define S second
#define V vector
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;

string _reset = "\u001b[0m", _yellow = "\u001b[33m", _bold = "\u001b[1m";
void DBG() { cerr << "]" << _reset << endl; }
template<class H, class...T> void DBG(H h, T ...t) {
	cerr << to_string(h);
	if(sizeof ...(t)) cerr << ", ";
	DBG(t...);
}
#ifdef CHEISSMART
#define debug(...) cerr << _yellow << _bold << "Line(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define debug(...)
#endif

const int INF = 1e9 + 7, mxM = 101;

template<class T> void cmax(T& a, T b) { a = max(a, b); }

int m, l;
ll a[mxM * 2], b[mxM * 2];

signed main()
{
	IO_OP;

	cin >> m >> l;
	ll tot = 0, ans = 0;
	for(int i = -m; i <= m; i++) {
		cin >> a[i + m];
		tot += a[i + m] * i;
	}
	if(tot < l) {
		tot = -tot;
		l = -l;
		for(int i = 0; i < m; i++)
			swap(a[i], a[2 * m - i]);
	}
	tot = 0;
	for(int i = -m; i <= 0; i++) {
		tot += a[i + m] * i;
		b[i + m] = a[i + m];
		ans += b[i + m];
	}

	if(tot > l) {
		cout << "impossible\n";
		return 0;
	}
	for(int i = 1; i <= m; i++) {
		assert(tot <= l);
		b[i + m] = min((l - tot) / i, a[i + m]);
		tot += b[i + m] * i;
		ans += b[i + m];
	}
	assert(tot <= l);
	if(tot + mxM < l) {
		cout << "impossible\n";
		return 0;
	}

	int C = mxM * mxM * 2;
	vi dp(C * 2, -INF);
	dp[0 + C] = 0;

	for(int i = -m; i <= m; i++) {
		vi ndp(C * 2, -INF);
		for(int delta = -2 * m - 1; delta <= 2 * m + 1; delta++) {
			if(b[i + m] + delta < 0 || b[i + m] + delta > a[i + m]) continue;
			for(int j = 0; j < C * 2; j++) if(0 <= j + delta * i && j + delta * i < C * 2) {
				cmax(ndp[j + delta * i], dp[j] + delta);
			}
		}
		swap(dp, ndp);
	}
	ans += dp[l - tot + C];
	if(ans < 0) cout << "impossible\n";
	else cout << ans << '\n';

}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 5 ms 596 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 121 ms 596 KB Output is correct
7 Correct 50 ms 596 KB Output is correct
8 Correct 117 ms 620 KB Output is correct
9 Correct 241 ms 596 KB Output is correct
10 Correct 12 ms 596 KB Output is correct
11 Correct 10 ms 596 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 5 ms 596 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 121 ms 596 KB Output is correct
7 Correct 50 ms 596 KB Output is correct
8 Correct 117 ms 620 KB Output is correct
9 Correct 241 ms 596 KB Output is correct
10 Correct 12 ms 596 KB Output is correct
11 Correct 10 ms 596 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 4 ms 596 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 121 ms 624 KB Output is correct
18 Correct 55 ms 596 KB Output is correct
19 Correct 130 ms 636 KB Output is correct
20 Correct 202 ms 620 KB Output is correct
21 Correct 12 ms 596 KB Output is correct
22 Correct 12 ms 596 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 463 ms 628 KB Output is correct
25 Correct 160 ms 596 KB Output is correct
26 Correct 893 ms 620 KB Output is correct
27 Correct 826 ms 620 KB Output is correct
28 Correct 24 ms 596 KB Output is correct
29 Correct 26 ms 596 KB Output is correct

Subtask #3-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 596 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 596 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 596 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 5 ms 596 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 121 ms 596 KB Output is correct
7 Correct 50 ms 596 KB Output is correct
8 Correct 117 ms 620 KB Output is correct
9 Correct 241 ms 596 KB Output is correct
10 Correct 12 ms 596 KB Output is correct
11 Correct 10 ms 596 KB Output is correct
12 Correct 5 ms 596 KB Output is correct
13 Incorrect 1 ms 212 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 596 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 5 ms 596 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 121 ms 596 KB Output is correct
7 Correct 50 ms 596 KB Output is correct
8 Correct 117 ms 620 KB Output is correct
9 Correct 241 ms 596 KB Output is correct
10 Correct 12 ms 596 KB Output is correct
11 Correct 10 ms 596 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 4 ms 596 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 121 ms 624 KB Output is correct
18 Correct 55 ms 596 KB Output is correct
19 Correct 130 ms 636 KB Output is correct
20 Correct 202 ms 620 KB Output is correct
21 Correct 12 ms 596 KB Output is correct
22 Correct 12 ms 596 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 463 ms 628 KB Output is correct
25 Correct 160 ms 596 KB Output is correct
26 Correct 893 ms 620 KB Output is correct
27 Correct 826 ms 620 KB Output is correct
28 Correct 24 ms 596 KB Output is correct
29 Correct 26 ms 596 KB Output is correct
30 Correct 5 ms 596 KB Output is correct
31 Incorrect 1 ms 212 KB Output isn't correct
32 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 596 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 5 ms 596 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 121 ms 596 KB Output is correct
7 Correct 50 ms 596 KB Output is correct
8 Correct 117 ms 620 KB Output is correct
9 Correct 241 ms 596 KB Output is correct
10 Correct 12 ms 596 KB Output is correct
11 Correct 10 ms 596 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 4 ms 596 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 121 ms 624 KB Output is correct
18 Correct 55 ms 596 KB Output is correct
19 Correct 130 ms 636 KB Output is correct
20 Correct 202 ms 620 KB Output is correct
21 Correct 12 ms 596 KB Output is correct
22 Correct 12 ms 596 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 463 ms 628 KB Output is correct
25 Correct 160 ms 596 KB Output is correct
26 Correct 893 ms 620 KB Output is correct
27 Correct 826 ms 620 KB Output is correct
28 Correct 24 ms 596 KB Output is correct
29 Correct 26 ms 596 KB Output is correct
30 Correct 5 ms 596 KB Output is correct
31 Incorrect 1 ms 212 KB Output isn't correct
32 Halted 0 ms 0 KB -