Submission #949460

#	Time	Username	Problem	Language	Result	Execution time	Memory
949460		LucaIlie	Olympiads (BOI19_olympiads)	C++17	44 / 100	2028 ms	544 KiB

olympiads

#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 500;
const int MAX_K = 6;

struct team {
    int total;
    int score[MAX_K];

    void init() {
        total = 0;
        for ( int i = 0; i < MAX_K; i++ )
            score[i] = 0;
    }

    bool operator < ( const team &t ) const {
        return total < t.total;
    }

    team operator + ( const team &t ) const {
        team ans;

        ans.total = 0;
        for ( int i = 0; i < MAX_K; i++ ) {
            ans.score[i] = max( score[i], t.score[i] );
            ans.total += ans.score[i];
        }

        return ans;
    }
};

team students[MAX_N];
team maxScore[MAX_N + 1][MAX_K + 1];

int cnt;
void bckt( int c, int s, int p, int n, team crt ) {
   // if ( (crt + maxScore[p + 1][c]).total < s )
      //  return;

    if ( c == 0 ) {
        if ( crt.total >=s )
        cnt++;
        return;
    }

    for ( int i = p + 1; i < n; i++ )
        bckt( c - 1, s, i, n, crt + students[i] );
}

int main() {
    int n, k, c;

    cin >> n >> k >> c;
    for ( int i = 0; i < n; i++ ) {
        for ( int j = 0; j < k; j++ ) {
            cin >> students[i].score[j];
            students[i].total += students[i].score[j];
        }
    }

    for ( int i = n - 1; i >= 0; i-- ) {
        for ( int c = 1; c <= k; c++ )
            maxScore[i][c] = max( maxScore[i + 1][c], maxScore[i + 1][c - 1] + students[i] );
    }

    int st = 0, dr = maxScore[0][k].total + 1;
    while ( dr - st > 1 ) {
        int mij = (st + dr) / 2;

        cnt = 0;
        team crt;
        crt.init();
        bckt( k, mij, -1, n, crt );

        if ( cnt < c )
            dr = mij;
        else
            st = mij;
    }

    cout << st;

    return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 31 / 31
• Subtask 3: 0 / 24
• Subtask 4: 0 / 32