結果
| 問題 |
No.1588 Connection
|
| コンテスト | |
| ユーザー |
theory_and_me
|
| 提出日時 | 2021-07-08 23:03:26 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 116 ms / 2,000 ms |
| コード長 | 3,657 bytes |
| コンパイル時間 | 2,263 ms |
| コンパイル使用メモリ | 205,524 KB |
| 最終ジャッジ日時 | 2025-01-22 19:10:19 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 31 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define REP(i,n) for(ll i=0;i<(ll)n;i++)
#define dump(x) cerr << "Line " << __LINE__ << ": " << #x << " = " << (x) << "\n";
#define spa << " " <<
#define fi first
#define se second
#define ALL(a) (a).begin(),(a).end()
#define ALLR(a) (a).rbegin(),(a).rend()
using ld = long double;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<ld, ld>;
template<typename T> using V = vector<T>;
template<typename T> using P = pair<T, T>;
template<typename T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); }
template<typename... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); }
template<class S, class T> ostream& operator << (ostream& os, const pair<S, T> v){os << "(" << v.first << ", " << v.second << ")"; return os;}
template<typename T> ostream& operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; }
template<class T> ostream& operator<<(ostream& os, const vector<vector<T>> &v){ for(auto &e : v){os << e << "\n";} return os;}
struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;
template <class T> void UNIQUE(vector<T> &x) {sort(ALL(x));x.erase(unique(ALL(x)), x.end());}
template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }
void fail() { cout << -1 << '\n'; exit(0); }
inline int popcount(const int x) { return __builtin_popcount(x); }
inline int popcount(const ll x) { return __builtin_popcountll(x); }
template<typename T> void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++)
{cerr<<v[i][0];for(ll j=1;j<w;j++)cerr spa v[i][j];cerr<<"\n";}};
template<typename T> void debug(vector<T>&v,ll n){if(n!=0)cerr<<v[0];
for(ll i=1;i<n;i++)cerr spa v[i];
cerr<<"\n";};
const ll INF = (1ll<<62);
// const ld EPS = 1e-10;
// const ld PI = acos(-1.0);
const ll mod = (int)1e9 + 7;
//const ll mod = 998244353;
int main(){
ll N, M;
cin >> N >> M;
auto ask = [](ll a, ll b)->ll{
cout << a+1 << " " << b+1 << endl;
string T;
cin >> T;
if(T == "Black"){
return 1;
}else if(T == "White"){
return 0;
}else{
assert(1);
}
return -1;
};
auto answer = [](bool flag){
cout << (flag ? "Yes" : "No") << endl;
exit(0);
};
const int num_dir = 4;
const int dx[] = {0, -1, 0, 1};
const int dy[] = {1, 0, -1, 0};
const int H = N;
const int W = N;
vector<vector<int>> dist(H, vector<int>(W, -1));
queue<pair<int, int>> qu;
qu.emplace(0, 0);
dist[0][0] = 0;
// BFS
ll cnt = 0;
while(!qu.empty()){
auto p = qu.front();qu.pop();
for(int idx=0;idx<num_dir;idx++){
int ni = p.first + dx[idx];
int nj = p.second + dy[idx];
if(ni == N-1 and nj == N-1){
answer(true);
}
if(ni<0 or nj<0 or ni>H-1 or nj>W-1) continue;
if(dist[ni][nj] != -1) continue;
if(cnt > 3000){
answer(false);
}
ll bw = ask(ni, nj);
cnt++;
if(bw == 1){
dist[ni][nj] = dist[p.first][p.second] + 1;
qu.emplace(ni, nj);
}else{
dist[ni][nj] = -2;
}
}
}
answer(false);
//debug(dist, H, W);
return 0;
}
theory_and_me