Submission #675117

#	Time	Username	Problem	Language	Result	Execution time	Memory
675117		uylulu	Table Tennis (info1cup20_tabletennis)	C++17	72 / 100	3068 ms	25216 KiB

tabletennis

#include <bits/stdc++.h>
using namespace std;

#define ld long double
#define int long long
#define endl "\n"

const int N = 3e5,K = 400;

int num[N + 1],n,k;
map<int,bool> mp;
vector<pair<int,int>> asd;

void build(int sum,int l,int r) {
    mp.clear();
    for(int i = l;i <= r;i++) {
        mp[num[i]] = 1;
    }
    for(int i = l;i <= r;i++) {
        if(sum < num[i]) continue;

        mp[num[i]] = false;
        if(mp[sum - num[i]]) {
            asd.push_back({sum - num[i],num[i]});
        }
    }
    if(asd.size() < n/2 - 1) {
        asd.clear();
        return;
    }
    
    vector<int> res;
    for(int i = 0;i < n/2 - 1;i++) {
        res.push_back(asd[i].first);
        res.push_back(asd[i].second);
    }
    sort(res.begin(),res.end());


    cout<<num[l - 1]<<" ";
    for(auto u : res) {
        cout<<u<<" ";
    }
    cout<<num[r + 1]<<endl;
    exit(0);
}

signed main() {
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    // freopen("in.txt","r",stdin);
    // freopen("out.txt","w",stdout);

    cin>>n>>k;
    int len = n + k;

    for(int i = 1;i <= len;i++) {
        cin>>num[i];
    }

    for(int i = 1;i <= k + 1 && i <= len;i++) {
        int left = len - (k - i + 1);
        for(int j = left;j <= len;j++) {
            build(num[i] + num[j],i + 1,j - 1);
        }
    }

    return 0;
}           

Compilation message (stderr)

tabletennis.cpp: In function 'void build(long long int, long long int, long long int)':
tabletennis.cpp:28:19: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   28 |     if(asd.size() < n/2 - 1) {
      |        ~~~~~~~~~~~^~~~~~~~~

• 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: 0 / 15
• Subtask 8: 0 / 13