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Submission #943662

# Submission time Handle Problem Language Result Execution time Memory
943662 2024-03-11T17:46:10 Z LucaIlie Uplifting Excursion (BOI22_vault) C++17
0 / 100
 443 ms 848 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_M = 50;
const int MAX_S = MAX_M * MAX_M;
const int MIN_S = -MAX_S;
const long long INF = 1e18;
unordered_map<int, long long> taken, untaken;
unordered_map<int, long long> dpCrt, dpPrv;

int main() {
    int m;
    long long l, u = 0, t = 0;

    cin >> m >> l;
    for ( int i = -m; i <= m; i++ ) {
        cin >> untaken[i];
        u += untaken[i];
    }

    if ( l < 0 ) {
        for ( int i = 1; i <= m; i++ )
            swap( untaken[i], untaken[-i] );
        l = -l;
    }

    long long s = 0;
    for ( int i = -m; i <= 0; i++ ) {
        long long x = untaken[i];
        s += i * x;
        taken[i] += x;
        untaken[i] -= x;
        t += x;
        u -= x;
    }
    for ( int i = 1; i <= m; i++ ) {
        long long x = min( untaken[i], (l - s) / i );
        s += i * x;
        taken[i] += x;
        untaken[i] -= x;
        t += x;
        u -= x;
    }

    if ( s + m < l ) {
        for ( int i = -m; i < 0; i++ ) {
            long long x = min( taken[i], (l - s) / (-i) );
            s -= i * x;
            taken[i] -= x;
            untaken[i] += x;
            t -= x;
            u += x;
        }
    }

    for ( int s = MIN_S; s <= MAX_S; s++ )
        dpCrt[s] = -INF;
    dpCrt[0] = 0;
    for ( int i = -m; i <= -1; i++ ) {
        swap( dpCrt, dpPrv );

        for ( int s = MIN_S; s <= MAX_S; s++ )
            dpCrt[s] = -INF;

        for ( int x = 0; x <= m && x <= untaken[i]; x++ ) {
            for ( int s = MIN_S; s - i * x <= MAX_S; s++ )
                dpCrt[s] = max( dpCrt[s], dpPrv[s - i * x] + x );
        }
        for ( int x = 0; x <= m && x <= taken[i]; x++ ) {
            for ( int s = MIN_S - i * x; s <= MAX_S; s++ )
                dpCrt[s] = max( dpCrt[s], dpPrv[s + i * x] - x );
        }
    }
    for ( int i = 0; i <= m; i++ ) {
        swap( dpCrt, dpPrv );

        for ( int s = MIN_S; s <= MAX_S; s++ )
            dpCrt[s] = -INF;

        for ( int x = 0; x <= m && x <= untaken[i]; x++ ) {
            for ( int s = MIN_S + i * x; s <= MAX_S; s++ )
                dpCrt[s] = max( dpCrt[s], dpPrv[s - i * x] + x );
        }
        for ( int x = 0; x <= m && x <= taken[i]; x++ ) {
            for ( int s = MIN_S; s + i * x <= MAX_S; s++ )
                dpCrt[s] = max( dpCrt[s], dpPrv[s + i * x] - x );
        }
    }

    if ( dpCrt[l - s] < 0 )
        cout << "impossible\n";
    else
        cout << t + dpCrt[l - s] << "\n";

    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 600 KB Output is correct
2 Correct 6 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 20 ms 832 KB Output is correct
5 Incorrect 443 ms 812 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 600 KB Output is correct
2 Correct 6 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 20 ms 832 KB Output is correct
5 Incorrect 443 ms 812 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 832 KB Output is correct
2 Correct 127 ms 848 KB Output is correct
3 Correct 57 ms 600 KB Output is correct
4 Correct 153 ms 604 KB Output is correct
5 Correct 175 ms 808 KB Output is correct
6 Correct 117 ms 808 KB Output is correct
7 Correct 44 ms 600 KB Output is correct
8 Correct 39 ms 600 KB Output is correct
9 Incorrect 75 ms 604 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 832 KB Output is correct
2 Correct 127 ms 848 KB Output is correct
3 Correct 57 ms 600 KB Output is correct
4 Correct 153 ms 604 KB Output is correct
5 Correct 175 ms 808 KB Output is correct
6 Correct 117 ms 808 KB Output is correct
7 Correct 44 ms 600 KB Output is correct
8 Correct 39 ms 600 KB Output is correct
9 Incorrect 75 ms 604 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 832 KB Output is correct
2 Correct 127 ms 848 KB Output is correct
3 Correct 57 ms 600 KB Output is correct
4 Correct 153 ms 604 KB Output is correct
5 Correct 175 ms 808 KB Output is correct
6 Correct 117 ms 808 KB Output is correct
7 Correct 44 ms 600 KB Output is correct
8 Correct 39 ms 600 KB Output is correct
9 Incorrect 75 ms 604 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 600 KB Output is correct
2 Correct 6 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 20 ms 832 KB Output is correct
5 Incorrect 443 ms 812 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 832 KB Output is correct
2 Correct 127 ms 848 KB Output is correct
3 Correct 57 ms 600 KB Output is correct
4 Correct 153 ms 604 KB Output is correct
5 Correct 175 ms 808 KB Output is correct
6 Correct 117 ms 808 KB Output is correct
7 Correct 44 ms 600 KB Output is correct
8 Correct 39 ms 600 KB Output is correct
9 Incorrect 75 ms 604 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 600 KB Output is correct
2 Correct 6 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 20 ms 832 KB Output is correct
5 Incorrect 443 ms 812 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 832 KB Output is correct
2 Correct 127 ms 848 KB Output is correct
3 Correct 57 ms 600 KB Output is correct
4 Correct 153 ms 604 KB Output is correct
5 Correct 175 ms 808 KB Output is correct
6 Correct 117 ms 808 KB Output is correct
7 Correct 44 ms 600 KB Output is correct
8 Correct 39 ms 600 KB Output is correct
9 Incorrect 75 ms 604 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 600 KB Output is correct
2 Correct 6 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 20 ms 832 KB Output is correct
5 Incorrect 443 ms 812 KB Output isn't correct
6 Halted 0 ms 0 KB -