結果
問題 | No.1717 Levi-Civita Triangle |
ユーザー | Sumitacchan |
提出日時 | 2021-10-22 22:56:23 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 23 ms / 2,000 ms |
コード長 | 2,815 bytes |
コンパイル時間 | 2,251 ms |
コンパイル使用メモリ | 194,968 KB |
最終ジャッジ日時 | 2025-01-25 04:06:10 |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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 <bits/stdc++.h> using namespace std; //using namespace atcoder; struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; #define FOR(i, begin, end) for(int i=(begin);i<(end);i++) #define REP(i, n) FOR(i,0,n) #define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--) #define IREP(i, n) IFOR(i,0,n) #define Sort(v) sort(v.begin(), v.end()) #define Reverse(v) reverse(v.begin(), v.end()) #define all(v) v.begin(),v.end() #define SZ(v) ((int)v.size()) #define Lower_bound(v, x) distance(v.begin(), lower_bound(v.begin(), v.end(), x)) #define Upper_bound(v, x) distance(v.begin(), upper_bound(v.begin(), v.end(), x)) #define chmax(a, b) a = max(a, b) #define chmin(a, b) a = min(a, b) #define bit(n) (1LL<<(n)) #define debug(x) cout << #x << "=" << x << endl; #define vdebug(v) { cout << #v << "=" << endl; REP(i_debug, (int)v.size()){ cout << v[i_debug] << ","; } cout << endl; } #define mdebug(m) { cout << #m << "=" << endl; REP(i_debug, (int)m.size()){ REP(j_debug, (int)m[i_debug].size()){ cout << m[i_debug][j_debug] << ","; } cout << endl;} } #define pb push_back #define fi first #define se second #define int long long #define INF 1000000000000000000 template<typename T> istream &operator>>(istream &is, vector<T> &v){ for (auto &x : v) is >> x; return is; } template<typename T> ostream &operator<<(ostream &os, vector<T> &v){ for(int i = 0; i < (int)v.size(); i++) { cout << v[i]; if(i != (int)v.size() - 1) cout << endl; }; return os; } template<typename T1, typename T2> ostream &operator<<(ostream &os, pair<T1, T2> p){ cout << '(' << p.first << ',' << p.second << ')'; return os; } template<typename T> void Out(T x) { cout << x << endl; } template<typename T1, typename T2> void chOut(bool f, T1 y, T2 n) { if(f) Out(y); else Out(n); } using vec = vector<int>; using mat = vector<vec>; using Pii = pair<int, int>; using v_bool = vector<bool>; using v_Pii = vector<Pii>; //int dx[4] = {1,0,-1,0}; //int dy[4] = {0,1,0,-1}; //char d[4] = {'D','R','U','L'}; const int mod = 1000000007; //const int mod = 998244353; signed main(){ int N; cin >> N; vec A(2 * N + 1); cin >> A; vec B(2 * (N - 1) + 1); REP(i, 2 * (N - 1) + 1){ if(A[i + 1] == (A[i] + 1) % 3 && A[i + 2] == (A[i] + 2) % 3) B[i] = 1; else if(A[i + 1] == (A[i] + 2) % 3 && A[i + 2] == (A[i] + 1) % 3) B[i] = 2; else B[i] = 0; } //vdebug(B); bool ok = true; REP(i, 2 * (N - 1) + 1){ if(i % 2 == 0 && B[i] == 0) ok = false; if(i % 2 == 1 && B[i] != 0) ok = false; } FOR(i, 2, 2 * (N - 1) + 1){ if(i % 2 == 0 && B[i] == B[i - 2]) ok = false; } int ans = 0; if(ok){ if(N % 2) ans = B[0]; else ans = 3 - B[0]; } Out(ans); return 0; }