提出 #73062461

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ソースコード 拡げる

#include <iostream>
#include <vector>
#include <algorithm>
#define fastio cin.tie(0)->sync_with_stdio(0)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define compress(v) sort(all(v)), v.erase(unique(all(v)), v.end())
#define sz(x) (int)(x).size()
using namespace std;
typedef long long ll;

int main() {
    fastio; int N; cin >> N;
    vector<int> v(N);
    for (auto& i : v) cin >> i;
    sort(all(v));
    int M1 = v.back(), M2 = 0, m = v[0], idx = -1;
    for (int i = N-1; i >= 0; i--) if (v[i] != M1) {
        M2 = v[i]; idx = i; break;
    }
    vector<int> cand;
    auto chk = [&](int st, int en, int val) {
        int mid = (st+en)/2;
        for (; st <= en; st++, en--) {
            if (st == en) {
                if (v[st] != val) return false;
            }
            else if (v[st]+v[en] != val) return false;
        }
        return true;
    };
    if (idx == -1) cand.push_back(M1);
    else if (chk(0, idx, M1)) cand.push_back(M1);
    if (chk(0, N-1, M1+m)) cand.push_back(M1+m);
    sort(all(cand));
    for (auto i : cand) cout << i << " ";
    return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In lambda function:
./Main.cpp:23:13: warning: unused variable 'mid' [-Wunused-variable]
   23 |         int mid = (st+en)/2;
      |             ^~~
./Main.cpp: In function 'int main()':
./Main.cpp:17:24: warning: variable 'M2' set but not used [-Wunused-but-set-variable]
   17 |     int M1 = v.back(), M2 = 0, m = v[0], idx = -1;
      |                        ^~

ジャッジ結果