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 23:08:52 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 19 ms / 2,000 ms |
コード長 | 3,083 bytes |
コンパイル時間 | 866 ms |
コンパイル使用メモリ | 99,492 KB |
実行使用メモリ | 7,788 KB |
最終ジャッジ日時 | 2024-10-04 18:46:18 |
合計ジャッジ時間 | 1,773 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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:104:23: warning: ‘sy’ may be used uninitialized in this function [-Wmaybe-uninitialized] 104 | dp[sy][sx][0] = 0; | ~~~~~~~~~~~~~~^~~ main.cpp:104:23: warning: ‘sx’ may be used uninitialized in this function [-Wmaybe-uninitialized]
ソースコード
#include <cstdio>#include <iostream>#include <vector>#include <map>#include <unordered_map>#include <set>#include <unordered_set>#include <string>#include <cstring>#include <sstream>#include <algorithm>#include <functional>#include <queue>#include <stack>#include <cmath>#include <iomanip>#include <list>#include <tuple>#include <bitset>#include <ciso646>#include <cassert>using namespace std;typedef long long ll;typedef unsigned long long ull;typedef long double ld;typedef pair<ll, ll> P;typedef tuple<ll, ll, ll> T;typedef vector<ll> vec;inline bool check(ll x, ll y, ll xMax, ll yMax) { return x >= 0 && y >= 0 && xMax > x && yMax > y; }inline int toint(string s) { int v; istringstream sin(s); sin >> v; return v; }template<class T> inline string tostring(T x) { ostringstream sout; sout << x; return sout.str(); }template<class T> inline T sqr(T x) { return x*x; }template<class T> inline T mypow(T x, ll n) { T res = 1; while (n > 0) { if (n & 1)res = res * x; x = x * x; n >>= 1; }return res; }inline ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }inline ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }#define For(i,a,b) for(ll (i) = (a);i < (b);(i)++)#define rep(i,n) For(i,0,n)#define rFor(i,a,b) for(ll (i) = (a-1);i >= (b);(i)--)#define rrep(i,n) rFor(i,n,0)#define each(i,n) for(auto &i : n)#define clr(a) memset((a), 0 ,sizeof(a))#define mclr(a) memset((a), -1 ,sizeof(a))#define all(a) (a).begin(),(a).end()#define sz(a) (sizeof(a))#define tostr(a) tostring(a)#define dump(val) cerr << #val " = " << val << endl;#define Fill(a,v) fill((int*)a,(int*)(a+(sz(a)/sz(*(a)))),v)const ll dx[8] = { 1, 0, -1, 0, 1, 1, -1, -1 }, dy[8] = { 0, -1, 0, 1, -1, 1, -1, 1 };const ll mod = 1e9 + 7;const ll INF = 1e17 + 9;#define int ll#define double ldint dp[501][501][2];struct State {int y, x, mode;State(int y,int x,int mode): y(y), x(x), mode(mode){}};signed main() {cin.tie(0);ios_base::sync_with_stdio(false);int h, w;cin >> h >> w;int sx, sy, gx, gy;vector<string> s(h);rep(y, h) {cin >> s[y];rep(x, w) {if (s[y][x] == 'S') {sy = y, sx = x;}if (s[y][x] == 'G') {gy = y, gx = x;}if (s[y][x] != 'R') {s[y][x] = '.';}}}int dy[2][8] = {{1,1,2,2,-1,-1,-2,-2},{1,1,-1,-1}};int dx[2][8] = {{2,-2,1,-1,2,-2,1,-1},{1,-1,1,-1}};Fill(dp, INF);queue<State> q;q.push(State(sy, sx, 0));dp[sy][sx][0] = 0;while (q.size()) {auto y = q.front().y;auto x = q.front().x;auto mode = q.front().mode;q.pop();rep(i, (mode == 0 ? 8 : 4)) {int ty = y + dy[mode][i], tx = x + dx[mode][i];if (check(tx, ty, w, h)) {int nextMode;if (s[ty][tx] == 'R') {nextMode = 1 - mode;}else {nextMode = mode;}if (dp[ty][tx][nextMode] > dp[y][x][mode] + 1) {dp[ty][tx][nextMode] = dp[y][x][mode] + 1;q.push(State(ty, tx, nextMode));}}}}int ans = min(dp[gy][gx][0], dp[gy][gx][1]);if (ans == INF)ans = -1;cout << ans << endl;return 0;}