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답안 #943677

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
943677 2024-03-11T17:56:52 Z LucaIlie Uplifting Excursion (BOI22_vault) C++17
0 / 100
 456 ms 2132 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_M = 100;
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;
        }
    }

    /*cout << s << "\n";
    for ( int i = -m; i <= m; i++ )
        cout << taken[i] << " " << untaken[i] << "\n";*/

    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 s = MIN_S; s <= MAX_S; s++ )
            dpCrt[s] = (dpCrt[s] <= -INF + 1 ? -INF : dpCrt[s] );

        /*for ( int s = MIN_S; s <= MAX_S; s++ )
            cout << dpCrt[s] << " ";
        cout << "\n";*/
    }
    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 );
        }

        for ( int s = MIN_S; s <= MAX_S; s++ )
            dpCrt[s] = (dpCrt[s] <= -INF + 1 ? -INF : dpCrt[s] );

        /*for ( int s = MIN_S; s <= MAX_S; s++ )
            cout << dpCrt[s] << " ";
        cout << "\n";*/
    }

    if ( l - s > MAX_S || dpCrt[l - s] == INF )
        cout << "impossible\n";
    else
        cout << t + dpCrt[l - s] << "\n";

    return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 2032 KB Output is correct
2 Incorrect 22 ms 2028 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 2032 KB Output is correct
2 Incorrect 22 ms 2028 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 2132 KB Output is correct
2 Correct 456 ms 1884 KB Output is correct
3 Incorrect 204 ms 1884 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 2132 KB Output is correct
2 Correct 456 ms 1884 KB Output is correct
3 Incorrect 204 ms 1884 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 2132 KB Output is correct
2 Correct 456 ms 1884 KB Output is correct
3 Incorrect 204 ms 1884 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 2032 KB Output is correct
2 Incorrect 22 ms 2028 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 2132 KB Output is correct
2 Correct 456 ms 1884 KB Output is correct
3 Incorrect 204 ms 1884 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 2032 KB Output is correct
2 Incorrect 22 ms 2028 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 2132 KB Output is correct
2 Correct 456 ms 1884 KB Output is correct
3 Incorrect 204 ms 1884 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 2032 KB Output is correct
2 Incorrect 22 ms 2028 KB Output isn't correct
3 Halted 0 ms 0 KB -