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 | 2016-04-29 23:15:57 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,244 bytes |
| コンパイル時間 | 1,214 ms |
| コンパイル使用メモリ | 84,480 KB |
| 実行使用メモリ | 6,824 KB |
| 最終ジャッジ日時 | 2024-10-04 18:51:48 |
| 合計ジャッジ時間 | 1,774 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 23 WA * 4 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:49:18: warning: ‘sy’ may be used uninitialized in this function [-Wmaybe-uninitialized]
49 | knight[sy][sx] = 0;
| ^
main.cpp:49:22: warning: ‘sx’ may be used uninitialized in this function [-Wmaybe-uninitialized]
49 | knight[sy][sx] = 0;
| ^
ソースコード
#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>
#include <queue>
#include <tuple>
using namespace std;
typedef tuple<int, int, char> TUP;
const int INF = 1e9;
void show(vector<vector<int>> &vv) {
int h = vv.size();
int w = vv[0].size();
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
printf("%d ", vv[i][j] == INF ? 0 : vv[i][j]);
}
cout << endl;
}
cout << endl;
}
int main() {
int h, w;
cin >> h >> w;
vector<string> board;
string str;
int sx, sy;
for (int i = 0; i < h; i++) {
cin >> str;
auto it = find(str.begin(), str.end(), 'S');
if (it != str.end()) {
sy = i;
sx = it - str.begin();
}
board.emplace_back(str);
}
vector<vector<int>> knight, bishop;
knight.assign(board.size(), vector<int>(board[0].size(), INF));
knight[sy][sx] = 0;
bishop = knight;
int k_dx[8] = {2, 1, -1, -2, -2, -1, 1, 2};
int k_dy[8] = {1, 2, 2, 1, -1, -2, -2, -1};
int b_dx[4] = {1, -1, -1, 1};
int b_dy[4] = {1, -1, -1, 1};
queue<TUP> que;
que.push(make_tuple(sx * 1000 + sy, 0, 'k'));
while (!que.empty()) {
auto t = que.front();
que.pop();
int x = get<0>(t) / 1000;
int y = get<0>(t) % 1000;
int hands = get<1>(t);
char c = get<2>(t);
if (c == 'k') {
for (int i = 0; i < 8; i++) {
int nx = x + k_dx[i];
int ny = y + k_dy[i];
if (nx < 0 || w <= nx || ny < 0 || h <= ny) {
continue;
}
if (knight[ny][nx] > hands + 1) {
knight[ny][nx] = hands + 1;
if (board[ny][nx] == 'G') {
cout << hands + 1 << endl;
// show(knight);
// show(bishop);
return 0;
}
que.push(make_tuple(nx * 1000 + ny, hands + 1, board[ny][nx] == 'R' ? 'b' : 'k'));
}
}
} else {
for (int i = 0; i < 4; i++) {
int nx = x + b_dx[i];
int ny = y + b_dy[i];
if (nx < 0 || w <= nx || ny < 0 || h <= ny) {
continue;
}
if (bishop[ny][nx] > hands + 1) {
bishop[ny][nx] = hands + 1;
if (board[ny][nx] == 'G') {
cout << hands + 1 << endl;
// show(knight);
// show(bishop);
return 0;
}
que.push(make_tuple(nx * 1000 + ny, hands + 1, board[ny][nx] == 'R' ? 'k' : 'b'));
}
}
}
}
cout << -1 << endl;
return 0;
}