結果

問題 No.367 ナイトの転身
ユーザー sugim48
提出日時 2016-04-29 22:38:30
言語 C++11(廃止可能性あり)
(gcc 13.3.0)
結果
AC  
実行時間 54 ms / 2,000 ms
コード長 1,795 bytes
コンパイル時間 827 ms
コンパイル使用メモリ 93,428 KB
実行使用メモリ 17,408 KB
最終ジャッジ日時 2024-10-04 18:19:23
合計ジャッジ時間 1,965 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
other AC * 27
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:73:45: warning: ‘tx’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   73 |         int ans = min(d[ty][tx][0], d[ty][tx][1]);
      |                                             ^
main.cpp:73:41: warning: ‘ty’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   73 |         int ans = min(d[ty][tx][0], d[ty][tx][1]);
      |                                         ^
main.cpp:40:23: warning: ‘sx’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   40 |         return (y * W + x) * 2 + t;
      |                ~~~~~~~^~~~
main.cpp:46:17: note: ‘sx’ was declared here
   46 |         int sy, sx, ty, tx;
      |                 ^~
main.cpp:40:19: warning: ‘sy’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   40 |         return (y * W + x) * 2 + t;
      |                 ~~^~~
main.cpp:46:13: note: ‘sy’ was declared here
   46 |         int sy, sx, ty, tx;
      |             ^~

ソースコード

diff #
プレゼンテーションモードにする

#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };
ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;
int dy[2][8] = {{-1, -2, -2, -1, 1, 2, 2, 1}, {-1, -1, 1, 1, -1, -1, 1, 1}};
int dx[2][8] = {{-2, -1, 1, 2, 2, 1, -1, -2}, {-1, 1, 1, -1, -1, 1, 1, -1}};
int H, W;
int f(int y, int x, int t) {
return (y * W + x) * 2 + t;
}
int main() {
cin >> H >> W;
vector<string> a(H);
int sy, sx, ty, tx;
for (int y = 0; y < H; y++) {
cin >> a[y];
for (int x = 0; x < W; x++) {
if (a[y][x] == 'S') sy = y, sx = x, a[y][x] = '.';
if (a[y][x] == 'G') ty = y, tx = x, a[y][x] = '.';
}
}
vector<vector<vector<int> > > d(H, vector<vector<int> >(W, vector<int>(2, INT_MAX)));
d[sy][sx][0] = 0;
queue<int> q;
q.push(f(sy, sx, 0));
while (!q.empty()) {
int z = q.front(); q.pop();
int y = z / 2 / W, x = z / 2 % W, t = z % 2;
for (int k = 0; k < 8; k++) {
int _y = y + dy[t][k], _x = x + dx[t][k];
if (_y >= 0 && _y < H && _x >= 0 && _x < W) {
int _t = t;
if (a[_y][_x] == 'R') _t ^= 1;
if (d[_y][_x][_t] > d[y][x][t] + 1) {
d[_y][_x][_t] = d[y][x][t] + 1;
q.push(f(_y, _x, _t));
}
}
}
}
int ans = min(d[ty][tx][0], d[ty][tx][1]);
if (ans == INT_MAX) ans = -1;
cout << ans << endl;
}
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