Submission #718284

#	Time	Username	Problem	Language	Result	Execution time	Memory
718284		vjudge1	Table Tennis (info1cup20_tabletennis)	C++17	87 / 100	3084 ms	3240 KiB

tabletennis

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
#define all(x) x.begin(),x.end()
const int MOD = 1e9 + 7, SZ = 1e5 + 10, MX = 1e9;
signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n, k;
    cin >> n >> k;
    int arr[n + k];
    for(int &i : arr)
        cin >> i;
    for(int i=0;i<=k;i++){
        for(int j=0;j<=k-i;j++){
            vector<int> ans;
            int l = i, r = n + k - j - 1, y = arr[i] + arr[n + k - j - 1];
            while(l < r){
                ll x = arr[l] + arr[r];
                if(ans.size() == n)
                    break;
                if(x == y){
                    ans.push_back(arr[l]);
                    ans.push_back(arr[r]);
                }
                if(x >= y)
                    r--;
                if(x <= y)
                    l++;
            }
            if(ans.size() == n){
                sort(all(ans));
                for(int x : ans)
                    cout << x << ' ';
                return 0;
            }
        }
    }
    return 0;
}
// https://www.youtube.com/watch?v=zL32whN6p0A&ab_channel=HeidiAdel-CartoonWorld

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:20:31: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |                 if(ans.size() == n)
      |                    ~~~~~~~~~~~^~~~
tabletennis.cpp:31:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   31 |             if(ans.size() == n){
      |                ~~~~~~~~~~~^~~~

• 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