#include<bits/stdc++.h>
using namespace std;
#define fast ios::sync_with_stdio(false); cin.tie(NULL)
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define em emplace
#define all(v) (v).begin(), (v).end()
#define pre(a) cout<<fixed; cout.precision(a)
#define mp make_pair
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<pii,pii> pipii;
const int inf = 1e9;
const ll INF = 1e18;
int n, m;
string s[1010];
priority_queue<pipii, vector<pipii>, greater<pipii>> pQ;
pii S;
pii E;
bool chk[1010][1010];
bool chk1[1010][1010];
bool chk2[1010][1010];
int dis[1010][1010];
int main() {
fast;
cin >> n >> m;
for(int i=0; i<n; i++) {
cin >> s[i];
}
cin >> S.fi >> S.se;
cin >> E.fi >> E.se;
S.fi--;
S.se--;
E.fi--;
E.se--;
for(int i=0; i<n; i++) {
for(int j=0; j<m; j++) {
dis[i][j] = inf;
}
}
pQ.em(mp(0, 0), S);
while(pQ.size()) {
int cost = pQ.top().fi.fi;
int dir = pQ.top().fi.se;
pii cur = pQ.top().se;
pQ.pop();
if(cur == E) {
cout << cost << "\n";
return 0;
}
if(chk[cur.fi][cur.se]) continue;
chk[cur.fi][cur.se] = true;
if(dir!=1) {
int l, r;
for(l = cur.fi; 0 <= l && s[l][cur.se] == '.'; l--);
for(r = cur.fi; r < n && s[r][cur.se] == '.'; r++);
l++;
r--;
for(int i=l; i<=r; i++) {
//chk1[i][cur.se] = true;
if(i < cur.fi) {
int d = min(2 * i - 2 * l + 1, 2 * cur.fi - 2 * i);
pQ.em(mp(cost + d, 1), mp(i, cur.se));
}
else if(i > cur.fi) {
int d = min(2 * r - 2 * i + 1, 2 * i - 2 * cur.fi);
pQ.em(mp(cost + d, 1), mp(i, cur.se));
}
}
}
else if(dir != 2) {
int l, r;
for(l = cur.se; 0 <= l && s[cur.fi][l] == '.'; l--);
for(r = cur.se; r < m && s[cur.fi][r] == '.'; r++);
l++;
r--;
for(int i=l; i<=r; i++) {
//chk2[cur.fi][i] = true;
if(i < cur.se) {
int d = min(2 * i - 2 * l + 1, 2 * cur.se - 2 * i);
pQ.em(mp(cost + d, 2), mp(cur.fi, i));
}
else if(i > cur.se) {
int d = min(2 * r - 2 * i + 1, 2 * i - 2 * cur.se);
pQ.em(mp(cost + d, 2), mp(cur.fi, i));
}
}
}
}
cout << "-1\n";
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
384 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
384 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
384 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |