Submission #447513

#	Time	Username	Problem	Language	Result	Execution time	Memory
447513		LucaIlie	Table Tennis (info1cup20_tabletennis)	C++17	61 / 100	100 ms	5444 KiB

tabletennis

#include <stdio.h>
#include <algorithm>
#include <map>

#define MAX_N 150000
#define MAX_K 400

int v[MAX_N + MAX_K], sume[(2 * MAX_K + 1) * (2 * MAX_K + 1)], ans[MAX_N];

int main() {
    int n, k, m, suma, apMax, s, f, i, j;

    scanf( "%d%d", &n, &k );
    for ( i = 0; i < n + k; i++ )
        scanf( "%d", &v[i] );

    m = 0;
    for ( i = 0; i < 2 * k + 1 && i < n + k; i++ ) {
        for ( j = n + k - (2 * k + 1) > 0 ? n + k - (2 * k + 1) : 0; j < n + k; j++ ) {
            if ( i != j ) {
                sume[m] = v[i] + v[j];
                m++;
            }
        }
    }

    std::sort( sume, sume + m );

    suma = -1;
    apMax = 0;
    i = 0;
    while ( i < m ) {
        j = i + 1;
        while ( j < m && sume[i] == sume[j] )
            j++;
        if ( j - i > apMax ) {
            apMax = j - i;
            suma = sume[i];
        }
        i = j;
    }

    s = 0;
    f = n + k - 1;
    i = 0;
    while ( s < f && i < n / 2 ) {
        if ( v[s] + v[f] == suma ) {
            ans[i] = v[s];
            ans[n - 1 - i] = v[f];
            s++;
            f--;
            i++;
        } else if ( v[s] + v[f] < suma )
            s++;
        else
            f--;
    }

    if ( i == n / 2 ) {
        for ( i = 0; i < n; i++ )
            printf( "%d ", ans[i] );
    } else
        printf( "%d ", 0 );

    return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf( "%d%d", &n, &k );
      |     ~~~~~^~~~~~~~~~~~~~~~~~
tabletennis.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         scanf( "%d", &v[i] );
      |         ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 9 / 9
• Subtask 3: 0 / 14
• Subtask 4: 15 / 15
• Subtask 5: 9 / 9
• Subtask 6: 0 / 14
• Subtask 7: 15 / 15
• Subtask 8: 13 / 13