oj.uz

Submission #579201

# Submission time Handle Problem Language Result Execution time Memory
579201 2022-06-18T13:17:47 Z cheissmart Uplifting Excursion (BOI22_vault) C++14
20 / 100
 155 ms 480 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);
	assert(tot + mxM >= l);

	// 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; delta <= 2 * m; 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';

	int lim = mxM * mxM;
    vector<int> f(2 * lim + 1, -1e9);
    f[lim] = 0;
    for (int i = 1; i <= m; i++) {
        vector<int> g(2 * lim + 1, -1e9);
        for (int j = -lim; j <= lim; j++) if (f[lim + j] > -1e8) {
            for (int k = 0; k <= a[i + m] - b[i + m] && j + i * k <= lim; k++) {
                g[lim + j + i * k] = max(g[lim + j + i * k], f[lim + j] + k);
            }
            for (int k = 0; k <= b[i + m] && j - i * k >= -lim; k++) {
                g[lim + j - i * k] = max(g[lim + j - i * k], f[lim + j] - k);
            }
        }
        swap(f, g);
    }
    if (f[l - tot + lim] < -1e8) cout << "impossible\n";
    else cout << ans + f[l - tot + lim] << "\n";

}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 12 ms 468 KB Output is correct
7 Correct 6 ms 468 KB Output is correct
8 Correct 15 ms 480 KB Output is correct
9 Correct 37 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 12 ms 468 KB Output is correct
7 Correct 6 ms 468 KB Output is correct
8 Correct 15 ms 480 KB Output is correct
9 Correct 37 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 13 ms 468 KB Output is correct
18 Correct 6 ms 468 KB Output is correct
19 Correct 20 ms 468 KB Output is correct
20 Correct 36 ms 468 KB Output is correct
21 Correct 2 ms 468 KB Output is correct
22 Correct 3 ms 468 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 55 ms 468 KB Output is correct
25 Correct 22 ms 468 KB Output is correct
26 Correct 115 ms 468 KB Output is correct
27 Correct 155 ms 468 KB Output is correct
28 Correct 3 ms 468 KB Output is correct
29 Correct 3 ms 468 KB Output is correct

Subtask #3-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Incorrect 0 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 1 ms 468 KB Output is correct
2 Incorrect 0 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 1 ms 468 KB Output is correct
2 Incorrect 0 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 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 12 ms 468 KB Output is correct
7 Correct 6 ms 468 KB Output is correct
8 Correct 15 ms 480 KB Output is correct
9 Correct 37 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Incorrect 0 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 1 ms 468 KB Output is correct
2 Incorrect 0 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 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 12 ms 468 KB Output is correct
7 Correct 6 ms 468 KB Output is correct
8 Correct 15 ms 480 KB Output is correct
9 Correct 37 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 13 ms 468 KB Output is correct
18 Correct 6 ms 468 KB Output is correct
19 Correct 20 ms 468 KB Output is correct
20 Correct 36 ms 468 KB Output is correct
21 Correct 2 ms 468 KB Output is correct
22 Correct 3 ms 468 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 55 ms 468 KB Output is correct
25 Correct 22 ms 468 KB Output is correct
26 Correct 115 ms 468 KB Output is correct
27 Correct 155 ms 468 KB Output is correct
28 Correct 3 ms 468 KB Output is correct
29 Correct 3 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Incorrect 0 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 1 ms 468 KB Output is correct
2 Incorrect 0 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 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 12 ms 468 KB Output is correct
7 Correct 6 ms 468 KB Output is correct
8 Correct 15 ms 480 KB Output is correct
9 Correct 37 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 13 ms 468 KB Output is correct
18 Correct 6 ms 468 KB Output is correct
19 Correct 20 ms 468 KB Output is correct
20 Correct 36 ms 468 KB Output is correct
21 Correct 2 ms 468 KB Output is correct
22 Correct 3 ms 468 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 55 ms 468 KB Output is correct
25 Correct 22 ms 468 KB Output is correct
26 Correct 115 ms 468 KB Output is correct
27 Correct 155 ms 468 KB Output is correct
28 Correct 3 ms 468 KB Output is correct
29 Correct 3 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Incorrect 0 ms 212 KB Output isn't correct
32 Halted 0 ms 0 KB -