oj.uz

Submission #721659

# Submission time Handle Problem Language Result Execution time Memory
721659 2023-04-11T06:20:07 Z dxz05 Uplifting Excursion (BOI22_vault) C++17
0 / 100
 1200 ms 4296 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
#define all(x) (x).begin(), (x).end()
#define MP make_pair
const int N = 100500;

const int LIM = 100 * 100 * 101 / 2 + 1;

vector<int> knapsack(vector<int> a){
    vector<int> dp(LIM, -1e9);
    dp[0] = 0;

    for (int x : a) {
        for (int i = LIM - 1; i >= x; i--) {
            dp[i] = max(dp[i], dp[i - x] + 1);
        }
    }

    return dp;
}

void solve(){
    int m; ll L;
    cin >> m >> L;
    
    if (L > LIM){
        cout << "impossible" << endl;
        return;
    }

    vector<int> pos, neg;
    for (int i = -m; i <= m; i++){
        int x;
        cin >> x;
        while (x--){
            if (i >= 0){
                pos.push_back(i);
            } else {
                neg.push_back(-i);
            }
        }
    }

    vector<int> dp1 = knapsack(pos);
    vector<int> dp2 = knapsack(neg);

    int ans = -1e9;
    for (int x = L; x < LIM; x++){
        int y = x - L;
        ans = max(ans, dp1[x] + dp2[y]);
    }

    if (ans < 0) {
        cout << "impossible" << endl;
    } else {
        cout << ans << endl;
    }
}

int main() {
    ios_base::sync_with_stdio(false);

#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    solve();

    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4180 KB Output is correct
2 Correct 6 ms 4288 KB Output is correct
3 Correct 6 ms 4288 KB Output is correct
4 Correct 38 ms 4212 KB Output is correct
5 Correct 1107 ms 4240 KB Output is correct
6 Correct 1200 ms 4296 KB Output is correct
7 Incorrect 457 ms 4236 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4180 KB Output is correct
2 Correct 6 ms 4288 KB Output is correct
3 Correct 6 ms 4288 KB Output is correct
4 Correct 38 ms 4212 KB Output is correct
5 Correct 1107 ms 4240 KB Output is correct
6 Correct 1200 ms 4296 KB Output is correct
7 Incorrect 457 ms 4236 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 4220 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 33 ms 4220 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 33 ms 4220 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 8 ms 4180 KB Output is correct
2 Correct 6 ms 4288 KB Output is correct
3 Correct 6 ms 4288 KB Output is correct
4 Correct 38 ms 4212 KB Output is correct
5 Correct 1107 ms 4240 KB Output is correct
6 Correct 1200 ms 4296 KB Output is correct
7 Incorrect 457 ms 4236 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 4220 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 8 ms 4180 KB Output is correct
2 Correct 6 ms 4288 KB Output is correct
3 Correct 6 ms 4288 KB Output is correct
4 Correct 38 ms 4212 KB Output is correct
5 Correct 1107 ms 4240 KB Output is correct
6 Correct 1200 ms 4296 KB Output is correct
7 Incorrect 457 ms 4236 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 4220 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 8 ms 4180 KB Output is correct
2 Correct 6 ms 4288 KB Output is correct
3 Correct 6 ms 4288 KB Output is correct
4 Correct 38 ms 4212 KB Output is correct
5 Correct 1107 ms 4240 KB Output is correct
6 Correct 1200 ms 4296 KB Output is correct
7 Incorrect 457 ms 4236 KB Output isn't correct
8 Halted 0 ms 0 KB -