이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#pragma GCC optimize("Ofast")
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
#define debug(x) cout << #x << " : " << x << endl << flush
#define endl '\n'
#define sz(x) (ll)x.size()
#define arr(x) array<ll, x>
#define insert emplace
//arr(2) s, e;
//ll n, m, k;
//ll ans;
//arr(2) v[6000000], g[6000000];
//ll pv = -1, pg = -1;
//
//int main()
//{
// ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//
// srand(time(0));
//// mt19937 mt(3);
//
// cin >> n >> m >> k;
//
// bool a[n + 1][m + 1], vis[n + 1][m + 1];
//
// For(i, n + 1)
// For(j, m + 1)
// vis[i][j] = 0;
//
// cin >> s[0] >> s[1];
// cin >> e[0] >> e[1];
//
// for(int i = 1;i <= n; i++)
// for(int j = 1;j <= m; j++)
// {
// char c;
// cin >> c;
//
// if(c == '.')
// a[i][j] = 0;
// else
// a[i][j] = 1;
// }
//
// v[++pv] = s;
// vis[s[0]][s[1]] = 1;
//
// while(1)
// {
// while(pv != -1)
// {
// auto x = v[pv];
// if(x[0] == e[0] and x[1] == e[1])
// break;
// pv--;
//
// if(x[0] != 1 and !vis[x[0] - 1][x[1]])
// {
// if(a[x[0] - 1][x[1]])
// g[++pg] = {x[0] - 1, x[1]};
// else
// {
// vis[x[0] - 1][x[1]] = 1;
// v[++pv] = {x[0] - 1, x[1]};
// }
// }
//
// if(x[0] != n and !vis[x[0] + 1][x[1]])
// {
// if(a[x[0] + 1][x[1]])
// g[++pg] = {x[0] + 1, x[1]};
// else
// {
// v[++pv] = {x[0] + 1, x[1]};
// vis[x[0] + 1][x[1]] = 1;
// }
// }
//
// if(x[1] != 1 and !vis[x[0]][x[1] - 1])
// {
// if(a[x[0]][x[1] - 1])
// g[++pg] = {x[0], x[1] - 1};
// else
// {
// v[++pv] = {x[0], x[1] - 1};
// vis[x[0]][x[1] - 1] = 1;
// }
// }
//
// if(x[1] != m and !vis[x[0]][x[1] + 1])
// {
// if(a[x[0]][x[1] + 1])
// g[++pg] = {x[0], x[1] + 1};
// else
// {
// v[++pv] = {x[0], x[1] + 1};
// vis[x[0]][x[1] + 1] = 1;
// }
// }
// }
//
// if(vis[e[0]][e[1]])
// break;
//
// while(pg >= 0)
// {
// arr(2) x = g[pg];
// arr(2) r, c;
//
// r[0] = max(x[0] - k + 1, 1);
// r[1] = min(x[0] + k - 1, n);
// c[0] = max(x[1] - k + 1, 1);
// c[1] = min(x[1] + k - 1, m);
//
// if(e[0] >= r[0] and e[0] <= r[1] and e[1] >= c[0] and e[1] <= c[1])
// {
// cout << ans + 1 << endl;
// return 0;
// }
//
// For(i, 2)
// For(j, 2)
// if(!vis[r[i]][c[j]])
// {
// v[++pv] = {r[i], c[j]};
// vis[r[i]][c[j]] = 1;
// }
//
//
// ll m = 50;
//
// if(k != 1)
// {
// For(i, m)
// {
// long long rn = rand();
//
// For(j, 2)
// {
// ll t = rn % (c[1] - c[0]) + c[0];
// if(!vis[r[j]][t])
// {
// v[++pv] = {r[j], t};
// vis[r[j]][t] = 1;
// }
// }
//
// For(j, 2)
// {
// ll t = rn % (r[1] - r[0]) + r[0];
// if(!vis[t][c[j]])
// {
// v[++pv] = {t, c[j]};
// vis[t][c[j]] = 1;
// }
// }
// }
// }
// pg--;
// }
//
// pg = -1;
//
// ans++;
// }
//
// cout << ans << endl;
//}
//94/100 \(´~`)/
ll r, c, n;
arr(2) s, e;
queue<arr(2)> q[2];
ll ans, o = -1;
vector<vector<char>> a;//its not int!
ll pos;
queue<arr(3)> bfs1, bfs2;
vector<arr(3)> v;
vector<vector<bool>> vis1, vis2, vis3, vis4;
bool check(ll x, ll y, ll z)
{
if(x < 0 || y < 0 || x >= c || y >= r) return 1;
if(a[x][y] == '.')
{
q[z%2].push({x, y});
return 1;
}
return 0;
};
int main(){
cin >> c >> r >> n;
cin >> s[0] >> s[1];
s[0]--; s[1]--;
cin >> e[0] >> e[1];
e[0]--; e[1]--;
a.resize(c);
For(i, c)
{
a[i].resize(r);
For(j, r)
cin >> a[i][j];
}
q[0].push(s);
vis1.resize(c);
vis2.resize(c);
vis3.resize(c);
vis4.resize(c);
For(i, c)
{
vis1[i].resize(r);
vis2[i].resize(r);
vis3[i].resize(r);
vis4[i].resize(r);
For(j, r)
{
vis1[i][j] = 0;
vis2[i][j] = 0;
vis3[i][j] = 0;
vis4[i][j] = 0;
}
}
while(pos < r*c && o == -1)
{
if(q[pos % 2].empty())
{
pos++;
while(!bfs1.empty())
{
auto [z, x, y] = bfs1.front();
vis1[x][y] = 0;
if(z!=0)
bfs2.push({n, x, y});
else
v.push_back({n-1, x, y});
q[pos%2].push({x, y});
bfs1.pop();
// debug(x);
// debug(y);
if(z<=0) continue;
if(y - 1 >= 0 and !vis1[x][y - 1] and !vis2[x][y - 1])
{
a[x][y-1] = '.';
vis2[x][y-1] = 1;
bfs1.push({z-1, x, y-1});
}
if(y + 1 < r and !vis1[x][y + 1] and !vis2[x][y + 1])
{
a[x][y + 1] = '.';
vis2[x][y + 1] = 1;
bfs1.push({z - 1, x, y + 1});
}
}
while(v.size())
{
bfs2.push(v.back());
v.pop_back();
}
while(bfs2.size()){
auto [z, x, y] = bfs2.front();
vis1[x][y] = 0;
bfs2.pop();
// debug(x);
// debug(y);
// debug(z);
if(z <= 0) continue;
if(x - 1 >= 0 and !vis1[x - 1][y] and !vis2[x - 1][y])
{
a[x - 1][y] = '.';
vis2[x - 1][y] = 1;
bfs2.push({z - 1, x - 1, y});
}
if(x + 1 < c and !vis1[x + 1][y] and !vis2[x + 1][y])
{
a[x + 1][y] = '.';
vis2[x + 1][y] = 1;
bfs2.push({z - 1, x + 1, y});
}
}
}
else
{
while(q[pos % 2].size()){
auto [x, y] = q[pos % 2].front();
q[pos % 2].pop();
int ans = 0;
if(vis1[x][y]) continue;
vis1[x][y] = 1;
if(x == e[0] and y == e[1] and o == -1)
o = pos;
ans += check(x-1, y, pos);
ans += check(x+1, y, pos);
ans += check(x, y-1, pos);
ans += check(x, y+1, pos);
if(ans != 4)
bfs1.push({n, x, y});
}
}
}
// debug(ans);
cout << o << '\n';
}
컴파일 시 표준 에러 (stderr) 메시지
Main.cpp: In function 'int main()':
Main.cpp:9:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
9 | #define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
| ^
Main.cpp:213:3: note: in expansion of macro 'For'
213 | For(i, c)
| ^~~
Main.cpp:9:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
9 | #define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
| ^
Main.cpp:216:4: note: in expansion of macro 'For'
216 | For(j, r)
| ^~~
Main.cpp:9:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
9 | #define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
| ^
Main.cpp:229:3: note: in expansion of macro 'For'
229 | For(i, c)
| ^~~
Main.cpp:9:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
9 | #define For(i, n) for(int (i) = 0; (i) < (n); (i)++)
| ^
Main.cpp:236:4: note: in expansion of macro 'For'
236 | For(j, r)
| ^~~
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