結果
問題 | No.1120 Strange Teacher |
ユーザー |
![]() |
提出日時 | 2020-07-22 21:29:32 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 7 ms / 1,000 ms |
コード長 | 6,035 bytes |
コンパイル時間 | 1,156 ms |
コンパイル使用メモリ | 117,756 KB |
最終ジャッジ日時 | 2025-01-12 02:11:09 |
ジャッジサーバーID (参考情報) |
judge3 / judge3 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 27 |
ソースコード
//#pragma GCC optimize("Ofast")//#pragma GCC target("avx")//#undef LOCAL#include <algorithm>#include <array>#include <bitset>#include <cassert>#include <complex>#include <cstdio>#include <cstring>#include <iostream>#include <map>#include <numeric>#include <queue>#include <set>#include <string>#include <unordered_map>#include <unordered_set>#include <vector>using namespace std;using uint = unsigned int;using ll = long long;using ull = unsigned long long;constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }template <class T> using V = vector<T>;template <class T> using VV = V<V<T>>;#include <unistd.h>struct Scanner {int fd = -1;char line[(1 << 15) + 1];size_t st = 0, ed = 0;void reread() {memmove(line, line + st, ed - st);ed -= st;st = 0;ed += ::read(fd, line + ed, (1 << 15) - ed);line[ed] = '\0';}bool succ() {while (true) {if (st == ed) {reread();if (st == ed) return false;}while (st != ed && isspace(line[st])) st++;if (st != ed) break;}if (ed - st <= 50) {bool sep = false;for (size_t i = st; i < ed; i++) {if (isspace(line[i])) {sep = true;break;}}if (!sep) reread();}return true;}template <class T, enable_if_t<is_same<T, string>::value, int> = 0>bool read_single(T& ref) {if (!succ()) return false;while (true) {size_t sz = 0;while (st + sz < ed && !isspace(line[st + sz])) sz++;ref.append(line + st, sz);st += sz;if (!sz || st != ed) break;reread();}return true;}template <class T, enable_if_t<is_integral<T>::value>* = nullptr>bool read_single(T& ref) {if (!succ()) return false;bool neg = false;if (line[st] == '-') {neg = true;st++;}ref = T(0);while (isdigit(line[st])) {ref = 10 * ref + (line[st++] & 0xf);}if (neg) ref = -ref;return true;}template <class T> bool read_single(V<T>& ref) {for (auto& d : ref) {if (!read_single(d)) return false;}return true;}void read() {}template <class H, class... T> void read(H& h, T&... t) {bool f = read_single(h);assert(f);read(t...);}int read_unsafe() { return 0; }template <class H, class... T> int read_unsafe(H& h, T&... t) {bool f = read_single(h);if (!f) return 0;return 1 + read_unsafe(t...);}Scanner(FILE* fp) : fd(fileno(fp)) {}};struct Printer {public:template <bool F = false> void write() {}template <bool F = false, class H, class... T>void write(const H& h, const T&... t) {if (F) write_single(' ');write_single(h);write<true>(t...);}template <class... T> void writeln(const T&... t) {write(t...);write_single('\n');}Printer(FILE* _fp) : fp(_fp) {}~Printer() { flush(); }private:static constexpr size_t SIZE = 1 << 15;FILE* fp;char line[SIZE], small[50];size_t pos = 0;void flush() {fwrite(line, 1, pos, fp);pos = 0;}void write_single(const char& val) {if (pos == SIZE) flush();line[pos++] = val;}template <class T, enable_if_t<is_integral<T>::value>* = nullptr>void write_single(T val) {if (pos > (1 << 15) - 50) flush();if (val == 0) {write_single('0');return;}if (val < 0) {write_single('-');val = -val; // todo min}size_t len = 0;while (val) {small[len++] = char(0x30 | (val % 10));val /= 10;}for (size_t i = 0; i < len; i++) {line[pos + i] = small[len - 1 - i];}pos += len;}void write_single(__int128 val) {if (pos > (1 << 15) - 50) flush();if (val == 0) {write_single('0');return;}if (val < 0) {write_single('-');val = -val; // todo min}size_t len = 0;while (val) {small[len++] = char(0x30 | (val % 10));val /= 10;}for (size_t i = 0; i < len; i++) {line[pos + i] = small[len - 1 - i];}pos += len;}void write_single(const string& s) {for (char c : s) write_single(c);}void write_single(const char* s) {size_t len = strlen(s);for (size_t i = 0; i < len; i++) write_single(s[i]);}template <class T> void write_single(const V<T>& val) {auto n = val.size();for (size_t i = 0; i < n; i++) {if (i) write_single(' ');write_single(val[i]);}}};Scanner sc = Scanner(stdin);Printer pr = Printer(stdout);int main() {int n;sc.read(n);V<ll> a(n), b(n);for (int i = 0; i < n; i++) {sc.read(a[i]);}for (int i = 0; i < n; i++) {int x;sc.read(x);a[i] -= x;}//1, 1, 1, -1ll sum = 0;for (int i = 0; i < n; i++) {sum += a[i];};if (n == 2) {if (sum) {pr.writeln(-1);} else {pr.writeln(abs(a[0]));}return 0;}if (sum % (n - 2)) {pr.writeln(-1);return 0;}ll c = sum / (n - 2);;for (auto x: a) {if (c < x || ((c - x) % 2)) {pr.writeln(-1);return 0;}}pr.writeln(c);return 0;}