Submission #1002028

#	Time	Username	Problem	Language	Result	Execution time	Memory
1002028		daffuwu	Table Tennis (info1cup20_tabletennis)	C++14	87 / 100	3095 ms	5580 KiB

tabletennis

#include <bits/stdc++.h>
using namespace std;
#define fr first
#define sc second
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

long long n, k, a[156069];
vector<long long> ans, cur;
map<long long, bool> vtd;

vector<long long> slv(long long sm)
{
    long long i, l, r;
    vector<long long> ret;
    for (l=1, r=n+k; l<r; l++, r--)
    {
        for (; l<r && a[l]+a[r]!=sm; )
        {
            if (a[l]+a[r]>sm) r--;
            else l++;
        }
        if (l == r) break;
        ret.push_back(l);
        ret.push_back(r);
    }
    sort(ret.begin(), ret.end());
    long long sz = ret.size();
    long long m = (sz-n)/2;
    //hapus m kiri dan m kanan
    reverse(ret.begin(), ret.end());
    for (i=1; i<=m; i++) ret.pop_back();
    reverse(ret.begin(), ret.end());
    for (i=1; i<=m; i++) ret.pop_back();
    return ret;
}

int main() 
{
    long long i, j;
    scanf("%lld%lld", &n, &k);
    for (i=1; i<=n+k; i++)
    {
        scanf("%lld", a+i);
    }
    for (i=1; i<=k+1; i++)
    {
        for (j=n+k; j>=n; j--)
        {
            if (i<j)
            {
                if (vtd.count(a[i]+a[j])) continue;
                vtd[a[i]+a[j]] = 1;
                cur = slv(a[i]+a[j]);
                if (cur.size() == n)
                {
                    ans = cur;
                    i = k+2;
                    break;
                }
            }
        }
    }
    for (auto x:ans) printf("%lld ", a[x]);
    printf("\n");
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:54:32: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   54 |                 if (cur.size() == n)
      |                     ~~~~~~~~~~~^~~~
tabletennis.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |     scanf("%lld%lld", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~
tabletennis.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |         scanf("%lld", a+i);
      |         ~~~~~^~~~~~~~~~~~~

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