結果

問題 No.1120 Strange Teacher
ユーザー satashun
提出日時 2020-07-22 21:27:58
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 23 ms / 1,000 ms
コード長 2,261 bytes
コンパイル時間 2,035 ms
コンパイル使用メモリ 194,992 KB
最終ジャッジ日時 2025-01-12 02:09:06
ジャッジサーバーID
（参考情報） 		judge5 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 27
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
template <class T>
using V = vector<T>;
template <class T>
using VV = V<V<T>>;
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define rep(i, n) rep2(i, 0, n)
#define rep2(i, m, n) for (int i = m; i < (n); i++)
#define per(i, b) per2(i, 0, b)
#define per2(i, a, b) for (int i = int(b) - 1; i >= int(a); i--)
#define ALL(c) (c).begin(), (c).end()
constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }
template <class T, class U>
void chmin(T& t, const U& u) {
    if (t > u) t = u;
}
template <class T, class U>
void chmax(T& t, const U& u) {
    if (t < u) t = u;
}
template <class T, class U>
ostream& operator<<(ostream& os, const pair<T, U>& p) {
    os << "(" << p.first << "," << p.second << ")";
    return os;
}
template <class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
    os << "{";
    rep(i, v.size()) {
        if (i) os << ",";
        os << v[i];
    }
    os << "}";
    return os;
}
#ifdef LOCAL
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << " " << H;
    debug_out(T...);
}
#define debug(...) \
    cerr << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif
int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int N;
    cin >> N;
    V<ll> d(N);
    rep(i, N) {
        int x;
        cin >> x;
        d[i] -= x;
    }
    rep(i, N) {
        int x;
        cin >> x;
        d[i] += x;
    }
    debug(d);
    ll s = 0;
    rep(i, N) s += d[i];
    if (N == 2) {
        if (s == 0)
            cout << abs(d[0]) << endl;
        else
            cout << -1 << endl;
        return 0;
    }
    if (s <= 0 && s % (N - 2) != 0) {
        cout << -1 << endl;
        return 0;
    }
    ll num = abs(s) / (N - 2);
    rep(i, N) {
        d[i] += num;
        if (d[i] < 0 || d[i] % 2 != 0) {
            cout << -1 << endl;
            return 0;
        }
    }
    cout << num << endl;
    return 0;
}
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