結果
問題 | No.367 ナイトの転身 |
ユーザー |
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提出日時 | 2016-04-29 22:50:21 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 37 ms / 2,000 ms |
コード長 | 3,489 bytes |
コンパイル時間 | 1,091 ms |
コンパイル使用メモリ | 110,560 KB |
実行使用メモリ | 7,808 KB |
最終ジャッジ日時 | 2024-10-11 00:17:00 |
合計ジャッジ時間 | 2,208 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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ファイルパターン | 結果 |
---|---|
other | AC * 27 |
コンパイルメッセージ
main.cpp: In function 'int main()': main.cpp:106:35: warning: 't' may be used uninitialized [-Wmaybe-uninitialized] 106 | long long ans = min(dist[t], dist[t+bishop]); | ^ main.cpp:55:15: note: 't' was declared here 55 | int s,t; | ^
ソースコード
#include <iostream>#include <vector>#include <cstdio>#include <sstream>#include <map>#include <string>#include <algorithm>#include <queue>#include <cmath>#include <functional>#include <set>#include <ctime>#include <random>#include <chrono>#include <cassert>using namespace std;namespace {using Integer = long long; //__int128;template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;}template<class T> istream& operator , (istream& is, T& val){ return is >> val;}template<class T> ostream& operator << (ostream& os, const vector<T>& vec){for(int i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"":""); return os;}template<class T> ostream& operator , (ostream& os, const T& val){ return os << " " << val;}template<class H> void print(const H& head){ cout << head; }template<class H, class ... T> void print(const H& head, const T& ... tail){ cout << head << " "; print(tail...); }template<class ... T> void println(const T& ... values){ print(values...); cout << endl; }template<class H> void eprint(const H& head){ cerr << head; }template<class H, class ... T> void eprint(const H& head, const T& ... tail){ cerr << head << " "; eprint(tail...); }template<class ... T> void eprintln(const T& ... values){ eprint(values...); cerr << endl; }string operator "" _s (const char* str, size_t size){ return move(string(str)); }constexpr Integer my_pow(Integer x, Integer k, Integer z=1){return k==0 ? z : k==1 ? z*x : (k&1) ? my_pow(x*x,k>>1,z*x) : my_pow(x*x,k>>1,z);}constexpr Integer my_pow_mod(Integer x, Integer k, Integer M, Integer z=1){return k==0 ? z%M : k==1 ? z*x%M : (k&1) ? my_pow_mod(x*x%M,k>>1,M,z*x%M) : my_pow_mod(x*x%M,k>>1,M,z);}constexpr unsigned long long operator "" _ten (unsigned long long value){ return my_pow(10,value); }inline int k_bit(Integer x, int k){return (x>>k)&1;} //0-indexedmt19937 mt(chrono::duration_cast<chrono::nanoseconds>(chrono::steady_clock::now().time_since_epoch()).count());template<class T> string join(const vector<T>& v, const string& sep){stringstream ss; for(int i=0; i<v.size(); i++){ if(i>0) ss << sep; ss << v[i]; } return ss.str();}}constexpr long long mod = 9_ten + 7;int main(){int h,w;cin >> h,w;vector<string> v(h);cin >> v;int s,t;for(int i=0; i<h; i++) for(int j=0; j<w; j++){if(v[i][j] == 'G') t = i*w + j;if(v[i][j] == 'S') s = i*w + j;}vector<long long> dist(2*h*w, 1145148931919LL);int bishop = h*w;dist[s] = 0;queue<int> q;q.push( s );int dx[] = {+1,+1,-1,-1,+2,+2,-2,-2, +1,+1,-1,-1};int dy[] = {+2,-2,+2,-2,+1,-1,+1,-1, +1,-1,+1,-1};while(q.size()){auto p = q.front();q.pop();if(p<bishop){for(int k=0; k<8; k++){int xx = p%w + dx[k];int yy = p/w + dy[k];if(xx<0 || xx>=w || yy<0 || yy>=h) continue;int next = xx + yy*w;if(v[yy][xx] == 'R') next += bishop;if(dist[next] >= 1145148931919LL){dist[next] = dist[p] + 1;q.push(next);}}}else{p -= bishop;for(int k=8; k<12; k++){int xx = p%w + dx[k];int yy = p/w + dy[k];if(xx<0 || xx>=w || yy<0 || yy>=h) continue;int next = xx + yy*w + bishop;if(v[yy][xx] == 'R') next -= bishop;if(dist[next] >= 1145148931919LL){dist[next] = dist[p+bishop] + 1;q.push(next);}}}}long long ans = min(dist[t], dist[t+bishop]);println( ans == 1145148931919LL ? -1 : ans);return 0;}