Submission #1319449

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319449		nnargiz	Table Tennis (info1cup20_tabletennis)	C++20	Compilation error	0 ms	0 KiB

tabletennis

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define int long long
using namespace __gnu_pbds;
using namespace std;
const int mod = 1e6 + 3;
const int inf = 1e9;
const int maxx = 3e6 + 5;
const int lg = 26;
typedef tree <int, null_type, less_equal <int>, rb_tree_tag, tree_order_statistics_node_update> ordered_multiset;

void solve () {
    int n, k, sum = 0, idx1 = -1, idx2 = -1;
    cin >> n >> k;
    vector <int> a(n + k);
    for (int i = 0; i < n + k; i++) {
        cin >> a[i];
        sum += a[i];
    }
    if (sum % 2) {
        for (int i = 0; i < n + k; i++) {
            if (a[i] % 2 && idx == -1) {
                idx1 = i;
                idx2 = i;
                break;
            }
            if (a[i] % 2) {
                idx2 = i;
            }
        }
    }

    // 1 2 3 4 7
    // 1  3

    // 3 6 7 8 9
    if (a[1] - a[0] > a[n - 1] - a[n - 2]) {
        if (sum % 2 == 0) {
            for (int i = 1; i <= n; i++) {
                cout << a[i] << ' ';
            }
        }
        else {
            for (int i = 0; i < idx2; i++) {
                cout << a[i] << ' ';
            }
            for (int i = idx2 + 1; i <= n; i++) {
                cout << a[i] << ' ';
            }
        }
    }
    else {
        if (sum % 2 == 0) {
            for (int i = 0; i < n; i++) {
                cout << a[i] << ' ';
            }
        }
        else {
            for (int i = 0; i < idx2; i++) {
                cout << a[i] << ' ';
            }
            for (int i = idx2 + 1; i <= n; i++) {
                cout << a[i] << ' ';
            }
        }
    }
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int t = 1;
    //cin >> t;
    while (t--) {
        solve();
    }
}

Compilation message (stderr)

tabletennis.cpp: In function 'void solve()':
tabletennis.cpp:23:29: error: 'idx' was not declared in this scope; did you mean 'idx2'?
   23 |             if (a[i] % 2 && idx == -1) {
      |                             ^~~
      |                             idx2