結果
問題 | No.1120 Strange Teacher |
ユーザー |
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提出日時 | 2020-07-22 21:45:49 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 110 ms / 1,000 ms |
コード長 | 2,571 bytes |
コンパイル時間 | 4,105 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 02:32:12 |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 27 |
ソースコード
#include <bits/stdc++.h>using namespace std;using LL = long long int;#define incID(i, l, r) for(int i = (l) ; i < (r); ++i)#define decID(i, l, r) for(int i = (r) - 1; i >= (l); --i)#define incII(i, l, r) for(int i = (l) ; i <= (r); ++i)#define decII(i, l, r) for(int i = (r) ; i >= (l); --i)#define inc(i, n) incID(i, 0, n)#define dec(i, n) decID(i, 0, n)#define inc1(i, n) incII(i, 1, n)#define dec1(i, n) decII(i, 1, n)#define inID(v, l, r) ((l) <= (v) && (v) < (r))#define inII(v, l, r) ((l) <= (v) && (v) <= (r))#define PB push_back#define EB emplace_back#define MP make_pair#define MT make_tuple#define FI first#define SE second#define FR front()#define BA back()#define ALL(v) v.begin(), v.end()#define RALL(v) v.rbegin(), v.rend()auto setmin = [](auto & a, auto b) { return (b < a ? a = b, true : false); };auto setmax = [](auto & a, auto b) { return (b > a ? a = b, true : false); };auto setmineq = [](auto & a, auto b) { return (b <= a ? a = b, true : false); };auto setmaxeq = [](auto & a, auto b) { return (b >= a ? a = b, true : false); };#define SI(v) static_cast<int>(v.size())#define RF(e, v) for(auto & e: v)#define until(e) while(! (e))#define if_not(e) if(! (e))#define ef else if#define UR assert(false)#define IN(T, ...) T __VA_ARGS__; IN_(__VA_ARGS__);void IN_() { };template<typename T, typename ... U> void IN_(T & a, U & ... b) { cin >> a; IN_(b ...); };template<typename T > void OUT(T && a ) { cout << a << endl; }template<typename T, typename ... U> void OUT(T && a, U && ... b) { cout << a << " "; OUT(b ...); }// ---- ----template<typename T> istream & operator>>(istream & s, vector<T> & v) { RF(e, v) { s >> e; } return s; }template<typename T> ostream & operator<<(ostream & s, vector<T> const & v) {inc(i, SI(v)) { s << (i == 0 ? "" : " ") << v[i]; }return s;}auto fl = [](auto a, auto b) { assert(b != 0); return a / b - (a % b != 0 && ((a >= 0) != (b >= 0)) ? 1 : 0); };auto ce = [](auto a, auto b) { assert(b != 0); return a / b + (a % b != 0 && ((a >= 0) == (b >= 0)) ? 1 : 0); };auto mo = [](auto a, auto b) { assert(b != 0); a %= b; if(a < 0) { a += abs(b); } return a; };int main() {IN(LL, n);vector<LL> a(n), b(n);cin >> a >> b;LL s = 0;inc(i, n) { s += b[i] - a[i]; }if(n == 2) { OUT(s == 0 ? abs(a[0] - b[0]): -1); exit(0); }LL d = fl(s, 2 - n);LL r = mo(s, 2 - n);bool ans = (r == 0 && d >= 0);inc(i, n) {LL v = b[i] - (a[i] - d);ans &= (v % 2 == 0 && inII(v, 0, 2 * d));}OUT(ans ? d : -1);}