結果
問題 | No.1717 Levi-Civita Triangle |
ユーザー |
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提出日時 | 2021-10-22 22:08:44 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 40 ms / 2,000 ms |
コード長 | 2,444 bytes |
コンパイル時間 | 3,316 ms |
コンパイル使用メモリ | 183,380 KB |
最終ジャッジ日時 | 2025-01-25 03:45:09 |
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 42 |
ソースコード
#include <algorithm>#include <bitset>#include <cassert>#include <cmath>#include <cstdio>#include <fstream>#include <functional>#include <iomanip>#include <iostream>#include <iterator>#include <map>#include <numeric>#include <queue>#include <set>#include <sstream>#include <stack>#include <unordered_set>using namespace std;#if __has_include(<atcoder/all>)#include <atcoder/all>using namespace atcoder;#endif#define GET_MACRO(_1, _2, _3, NAME, ...) NAME#define _rep(i, n) _rep2(i, 0, n)#define _rep2(i, a, b) for(int i = (int)(a); i < (int)(b); i++)#define rep(...) GET_MACRO(__VA_ARGS__, _rep2, _rep)(__VA_ARGS__)#define all(x) (x).begin(), (x).end()#define rall(x) (x).rbegin(), (x).rend()using i64 = long long;template<class T, class U>bool chmin(T& a, const U& b) { return (b < a) ? (a = b, true) : false; }template<class T, class U>bool chmax(T& a, const U& b) { return (b > a) ? (a = b, true) : false; }template<typename T>istream& operator>>(istream&i,vector<T>&v){rep(j,v.size())i>>v[j];return i;}template<typename T>string join(vector<T>&v){stringstream s;rep(i,v.size())s<<' '<<v[i];return s.str().substr(1);}template<typename T>ostream& operator<<(ostream&o,vector<T>&v){if(v.size())o<<join(v);return o;}template<typename T>string join(vector<vector<T>>&vv){string s="\n";rep(i,vv.size())s+=join(vv[i])+"\n";return s;}template<typename T>ostream& operator<<(ostream&o,vector<vector<T>>&vv){if(vv.size())o<<join(vv);return o;}int main(){int n;cin >> n;vector<int> a(2 * n + 1);cin >> a;rep(i, 2 * n){if (a[i] == a[i + 1]){cout << 0 << endl;return 0;}}vector<int> nx;set<tuple<int, int, int>> one = {{0, 1, 2}, {1, 2, 0}, {2, 0, 1}};set<tuple<int, int, int>> two = {{2, 1, 0}, {0, 2, 1}, {1, 0, 2}};rep(i, 2 * n - 1){int x = a[i], y = a[i + 1], z = a[i + 2];if (one.count({x, y, z})) nx.push_back(1);else if (two.count({x, y, z})) nx.push_back(2);else nx.push_back(0);}int nn = nx.size();if (nx[0] == 0 && nx.back() == 0){cout << 0 << endl;return 0;}rep(i, nn - 1){if (nx[i] == nx[i + 1]){cout << 0 << endl;return 0;}if (i + 2 < nn && nx[i] > 0 && nx[i + 2] == nx[i]){cout << 0 << endl;return 0;}}cout << nx.back() << endl;}