結果
| 問題 |
No.367 ナイトの転身
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-09-18 15:13:10 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 65 ms / 2,000 ms |
| コード長 | 2,515 bytes |
| コンパイル時間 | 2,333 ms |
| コンパイル使用メモリ | 204,416 KB |
| 最終ジャッジ日時 | 2025-01-24 15:45:28 |
|
ジャッジサーバーID (参考情報) |
judge1 / 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
In file included from /usr/include/c++/13/algorithm:60,
from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51,
from main.cpp:1:
In function ‘constexpr const _Tp& std::min(const _Tp&, const _Tp&) [with _Tp = long long int]’,
inlined from ‘int main()’ at main.cpp:89:15:
/usr/include/c++/13/bits/stl_algobase.h:238:15: warning: ‘gx’ may be used uninitialized [-Wmaybe-uninitialized]
238 | if (__b < __a)
| ~~~~^~~~~
main.cpp: In function ‘int main()’:
main.cpp:51:14: note: ‘gx’ was declared here
51 | ll sx,sy,gx,gy;
| ^~
main.cpp:62:20: warning: ‘sx’ may be used uninitialized [-Wmaybe-uninitialized]
62 | dist[sx][sy][0]=0;
| ~~~~~~~~~~~~~~~^~
main.cpp:51:8: note: ‘sx’ was declared here
51 | ll sx,sy,gx,gy;
| ^~
main.cpp:62:20: warning: ‘sy’ may be used uninitialized [-Wmaybe-uninitialized]
62 | dist[sx][sy][0]=0;
| ~~~~~~~~~~~~~~~^~
main.cpp:51:11: note: ‘sy’ was declared here
51 | ll sx,sy,gx,gy;
| ^~
In function ‘constexpr const _Tp& std::min(const _Tp&, const _Tp&) [with _Tp = long long int]’,
inlined from ‘int main()’ at main.cpp:89:15:
/usr/include/c++/13/bits/stl_algobase.h:238:15: warning: ‘gy’ may be used uninitialized [-Wmaybe-uninitialized]
238 | if (__b < __a)
| ~~~~^~~~~
main.cpp: In function ‘int main()’:
main.cpp:51:17: note: ‘gy’ was declared here
51 | ll sx,sy,gx,gy;
| ^~
ソースコード
#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(ll i=0;i<n;i++)
#define repl(i,l,r) for(ll i=(l);i<(r);i++)
#define per(i,n) for(ll i=(n)-1;i>=0;i--)
#define perl(i,r,l) for(ll i=r-1;i>=l;i--)
#define fi first
#define se second
#define pb push_back
#define ins insert
#define pqueue(x) priority_queue<x,vector<x>,greater<x>>
#define all(x) (x).begin(),(x).end()
#define CST(x) cout<<fixed<<setprecision(x)
#define vtpl(x,y,z) vector<tuple<x,y,z>>
#define rev(x) reverse(x);
using ll=long long;
using vl=vector<ll>;
using vvl=vector<vector<ll>>;
using pl=pair<ll,ll>;
using vpl=vector<pl>;
using vvpl=vector<vpl>;
const ll MOD=1000000007;
const ll MOD9=998244353;
const int inf=1e9+10;
const ll INF=4e18;
//const ll dy[9]={0,1,-1,0,1,1,-1,-1,0};
//const ll dx[9]={1,0,0,-1,1,-1,1,-1,0};
template<class T> inline bool chmin(T& a, T b) {
if (a > b) {
a = b;
return true;
}
return false;
}
template<class T> inline bool chmax(T& a, T b) {
if (a < b) {
a = b;
return true;
}
return false;
}
int main(){
ll h,w;cin >> h >> w;
vector<string> g(h);
rep(i,h)cin >> g[i];
vl dx={1,2,2,1,-1,-2,-2,-1};
vl dy={2,1,-1,-2,-2,-1,1,2};
vl ddx={1,1,-1,-1};
vl ddy={1,-1,-1,1};
ll sx,sy,gx,gy;
rep(i,h)rep(j,w){
if(g[i][j]=='S'){
sx=i,sy=j;g[i][j]='.';
}
if(g[i][j]=='G'){
gx=i,gy=j;g[i][j]='.';
}
}
ll dist[h][w][2];
rep(i,h)rep(j,w)rep(k,2)dist[i][j][k]=INF;
dist[sx][sy][0]=0;
queue<ll> que;que.push(sx*w*2+sy*2);
while(!que.empty()){
ll v=que.front();que.pop();
ll p=v%2;v/=2;
if(p==0){
rep(i,8){
ll nx=v/w+dx[i],ny=v%w+dy[i];
if(nx<0||ny<0||nx>=h||ny>=w)continue;
ll to=p;if(g[nx][ny]=='R')to^=1;
if(dist[nx][ny][to]!=INF)continue;
dist[nx][ny][to]=dist[v/w][v%w][p]+1;
que.push(nx*w*2+ny*2+to);
}
}
else{
rep(i,4){
ll nx=v/w+ddx[i],ny=v%w+ddy[i];
if(nx<0||ny<0||nx>=h||ny>=w)continue;
ll to=p;if(g[nx][ny]=='R')to^=1;
if(dist[nx][ny][to]!=INF)continue;
dist[nx][ny][to]=dist[v/w][v%w][p]+1;
que.push(nx*w*2+ny*2+to);
}
}
}
ll ans=min(dist[gx][gy][0],dist[gx][gy][1]);
if(ans==INF)cout << -1 << endl;
else cout << ans << endl;
}