結果
| 問題 | No.3504 Insert Maze |
| コンテスト | |
| ユーザー |
こめだわら
|
| 提出日時 | 2026-04-18 11:56:09 |
| 言語 | C++23 (gcc 15.2.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 643 ms / 2,000 ms |
| コード長 | 2,649 bytes |
| 記録 | |
| コンパイル時間 | 2,501 ms |
| コンパイル使用メモリ | 345,668 KB |
| 実行使用メモリ | 144,640 KB |
| 最終ジャッジ日時 | 2026-04-18 11:56:45 |
| 合計ジャッジ時間 | 30,684 ms |
|
ジャッジサーバーID (参考情報) |
judge3_0 / judge1_1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 85 |
コンパイルメッセージ
main.cpp: In function 'void solve()':
main.cpp:87:19: warning: 'gi' may be used uninitialized [-Wmaybe-uninitialized]
87 | ll ans=dist[gi][gj];
| ^
main.cpp:45:14: note: 'gi' was declared here
45 | ll si,sj,gi,gj;
| ^~
main.cpp:87:23: warning: 'gj' may be used uninitialized [-Wmaybe-uninitialized]
87 | ll ans=dist[gi][gj];
| ^
main.cpp:45:17: note: 'gj' was declared here
45 | ll si,sj,gi,gj;
| ^~
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
#define rep(i,n) for(ll i=0;i<n;++i)
#define all(a) (a).begin(),(a).end()
ll intpow(ll a, ll b){ ll ans = 1; while(b){ if(b & 1) ans *= a; a *= a; b /= 2; } return ans; }
ll modpow(ll a, ll b, ll p){ ll ans = 1; while(b){ if(b & 1) (ans *= a) %= p; (a *= a) %= p; b /= 2; } return ans; }
template<class T> T div_floor(T a, T b) { return a / b - ((a ^ b) < 0 && a % b); }
template<class T> T div_ceil(T a, T b) { return a / b + ((a ^ b) > 0 && a % b); }
template <typename T, typename U> inline bool chmin(T &x, U y) { return (y < x) ? (x = y, true) : false; }
template <typename T, typename U> inline bool chmax(T &x, U y) { return (x < y) ? (x = y, true) : false; }
template<typename T>
ostream &operator<<(ostream &os, const vector<T> &a){
if (a.empty()) return os;
os << a.front();
for (auto e : a | views::drop(1)){
os << ' ' << e;
}
return os;
}
void dump(auto ...vs){
((cout << vs << ' '), ...) << endl;
}
void solve() {
ll BH,BW;
cin>>BH>>BW;
ll H=2*BH-1;
ll W=2*BW-1;
vector<string> G(H,string(W,'.'));
rep(i,BH){
string S;
cin>>S;
rep(j,BW){
G[2*i][2*j]=S[j];
}
}
ll si,sj,gi,gj;
rep(i,H){
rep(j,W){
if (G[i][j]=='S'){
si=i;
sj=j;
}
if (G[i][j]=='G'){
gi=i;
gj=j;
}
}
}
vector<ll> dxdy={0,1,0,-1,0};
vector<vector<ll>> dist(H,vector<ll>(W,1e18));
dist[si][sj]=0;
queue<pair<ll,ll>> qu;
qu.emplace(si,sj);
while (qu.size()>0){
auto [ci,cj]=qu.front();qu.pop();
rep(d,4){
ll di=dxdy[d];
ll dj=dxdy[d+1];
ll ni,nj;
ni=ci+di;
nj=cj+dj;
if (0<=ni and ni<H and 0<=nj and nj<W and G[ni][nj]!='#'){
if (chmin(dist[ni][nj],dist[ci][cj]+1)){
qu.emplace(ni,nj);
}
}
ni=ci+2*di;
nj=cj+2*dj;
if ((di==0 or ci%2==0) and (dj==0 or cj%2==0)){
if (0<=ni and ni<H and 0<=nj and nj<W and G[ni][nj]!='#'){
if (chmin(dist[ni][nj],dist[ci][cj]+1)){
qu.emplace(ni,nj);
}
}
}
}
}
ll ans=dist[gi][gj];
cout<<ans<<'\n';
return;
}
int main() {
cin.tie(0)->sync_with_stdio(0);
ll T=1;
while (T--){
solve();
}
return 0;
}
こめだわら