結果

問題 No.1120 Strange Teacher
ユーザー uchiiiiuchiiii
提出日時 2020-09-03 01:42:39
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 4,090 bytes
コンパイル時間 3,176 ms
コンパイル使用メモリ 219,492 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-05-01 22:46:13
合計ジャッジ時間 4,268 ms
ジャッジサーバーID
(参考情報)
judge1 / judge5
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 1 ms
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 3 ms
5,376 KB
testcase_04 AC 17 ms
5,376 KB
testcase_05 AC 17 ms
5,376 KB
testcase_06 AC 19 ms
5,376 KB
testcase_07 AC 19 ms
5,376 KB
testcase_08 AC 19 ms
5,376 KB
testcase_09 AC 2 ms
5,376 KB
testcase_10 AC 18 ms
5,376 KB
testcase_11 AC 18 ms
5,376 KB
testcase_12 AC 18 ms
5,376 KB
testcase_13 AC 19 ms
5,376 KB
testcase_14 AC 19 ms
5,376 KB
testcase_15 AC 19 ms
5,376 KB
testcase_16 WA -
testcase_17 WA -
testcase_18 AC 2 ms
5,376 KB
testcase_19 AC 19 ms
5,376 KB
testcase_20 WA -
testcase_21 AC 1 ms
5,376 KB
testcase_22 AC 2 ms
5,376 KB
testcase_23 AC 2 ms
5,376 KB
testcase_24 AC 15 ms
5,376 KB
testcase_25 AC 1 ms
5,376 KB
testcase_26 AC 2 ms
5,376 KB
testcase_27 AC 2 ms
5,376 KB
testcase_28 AC 2 ms
5,376 KB
testcase_29 AC 1 ms
5,376 KB
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 #

#pragma GCC target("avx2")
#pragma GCC optimize("03")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std; typedef long double ld; typedef long long ll;
typedef unsigned long long ull;
#define endl "\n"
#define FOR(i,a,b) for(int i=(a);i<=(b);i++)
#define rep(i,n) for(int i=0;i<(n);i++)
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define ALL(x) (x).begin(), (x).end()
int dx[] = {1, 0, -1, 0}; int dy[] = {0, 1, 0, -1};
constexpr int INF=1<<30;
constexpr ll LINF=1LL<<60; 
constexpr ll mod=1e9+7;
template<class T>vector<T> vec(int len, T elem) { return vector<T>(len, elem); } // auto dp = vec(52, vec(103, vec(103, INF)));
template<class T>inline bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T>inline bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; }
template<class T>inline int popcount(T a) {return __builtin_popcount(a);}
template<class T>inline T emod(T a, T p) { return (a%p + p) % p;}
template <typename T> istream &operator>>(istream &is, vector<T> &vec) { for (auto &v : vec) is >> v; return is; }
template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) {os << '\n'; for (auto v : vec) os << v << ' '; os << '\n'; return os;}
template <typename T> ostream &operator<<(ostream &os, const deque<T> &vec) { os << "deq["; for (auto v : vec) os << v << ','; os << ']'; return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const unordered_set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa) { os << '(' << pa.first << ',' << pa.second << ')'; return os; }
template <typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
template <typename TK, typename TV> ostream &operator<<(ostream &os, const unordered_map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
struct MyIO {
    MyIO(){
        cin.tie(0); 
        ios::sync_with_stdio(false); 
        cout << fixed << setprecision(15);
    }
} IO_OI;
#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() {
    int n;cin>>n;
    vector<ll> a(n);
    rep(i,n) cin>>a[i];
    ll sm=0;
    rep(i,n) {
        ll x; cin>>x;
        a[i] = x-a[i];
        sm += a[i];
    }
    if(n==2) {
        if(a[0] == -a[1]) cout << a[0] << endl;
        else cout << -1 << endl;
        return 0;
    }
    if(sm > 0) {
        cout << -1 << endl;
        return 0;
    } else if(sm==0) {
        bool ok = true;
        rep(i, n) if(a[i]!=0) ok =false;
        if(ok) cout << 0 << endl;
        else cout << -1 << endl;
        return 0;
    }
    ll cnt = -sm/(n-2);
    if(-cnt*(n-2)==sm) {
        bool ok = true;
        ll smm = 0;
        rep(i, n) {
            ll cur = a[i]+cnt;
            if(cur&1) {
                ok = false;
                break;
            } else smm += cur/2;
        }
        if(ok and smm==cnt) cout << cnt << endl;
        else cout << -1 << endl;
    } else {
        cout << -1 << endl;
    }
    return 0;
}
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