結果
| 問題 |
No.3121 Prime Dance
|
| コンテスト | |
| ユーザー |
shobonvip
|
| 提出日時 | 2025-04-20 02:32:32 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 4,535 bytes |
| コンパイル時間 | 5,893 ms |
| コンパイル使用メモリ | 299,672 KB |
| 実行使用メモリ | 175,920 KB |
| 最終ジャッジ日時 | 2025-04-20 02:32:50 |
| 合計ジャッジ時間 | 16,622 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 20 TLE * 1 |
ソースコード
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
/**
author: shobonvip
created: 2025.04.20 01:49:37
**/
#include<bits/stdc++.h>
using namespace std;
//* ATCODER
#include<atcoder/all>
using namespace atcoder;
typedef modint998244353 mint;
//*/
/* BOOST MULTIPRECISION
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
//*/
typedef long long ll;
#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)
#define all(v) v.begin(), v.end()
template <typename T> bool chmin(T &a, const T &b) {
if (a <= b) return false;
a = b;
return true;
}
template <typename T> bool chmax(T &a, const T &b) {
if (a >= b) return false;
a = b;
return true;
}
template <typename T> T max(vector<T> &a){
assert(!a.empty());
T ret = a[0];
for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]);
return ret;
}
template <typename T> T min(vector<T> &a){
assert(!a.empty());
T ret = a[0];
for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]);
return ret;
}
template <typename T> T sum(vector<T> &a){
T ret = 0;
for (int i=0; i<(int)a.size(); i++) ret += a[i];
return ret;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int h, w;
cin >> h >> w;
int sx, sy, gx, gy;
cin >> sx >> sy >> gx >> gy;
sx--; sy--; gx--; gy--;
vector<vector<char>> c(h, vector<char>(w));
rep(i,0,h) rep(j,0,w) {
cin >> c[i][j];
}
if (sx > gx) {
vector<vector<char>> nc(h, vector<char>(w));
rep(i,0,h) {
rep(j,0,w) {
nc[i][j] = c[h-1-i][j];
}
}
swap(c, nc);
sx = h-1-sx;
gx = h-1-gx;
}
if (sy > gy) {
vector<vector<char>> nc(h, vector<char>(w));
rep(i,0,h) {
rep(j,0,w) {
nc[i][j] = c[i][w-1-j];
}
}
swap(c, nc);
sy = w-1-sy;
gy = w-1-gy;
}
int geta_h = gx - sx;
int geta_w = gy - sy;
static int d[1600][1620][4];
static bool seen[1600][1620][4];
rep(i,0,1600)rep(k,0,1620)rep(s,0,4){
d[i][k][s]=1e9;
}
d[sx*w+sy][0][0] = 0;
deque<tuple<int,int,int>> mada;
mada.push_back(make_tuple(sx*w+sy, 0, 0));
while(!mada.empty()){
auto [val, a, state] = mada.front();
mada.pop_front();
if(seen[val][a][state]) continue;
seen[val][a][state] = 1;
int i = val/w;
int j = val%w;
vector<int> cango;
for (auto [x, y]:{
pair(i-1, j),
pair(i+1, j),
pair(i, j-1),
pair(i, j+1)
}) {
if (!(0<=x&&x<h)) continue;
if (!(0<=y&&y<w)) continue;
if (c[x][y]=='#') continue;
if (x != i) cango.push_back(1);
if (y != j) cango.push_back(2);
if (j-y > 0) {
if (chmin(d[x*w+y][a][state], d[val][a][state] + 1)) {
mada.push_back(make_tuple(x*w+y,a,state));
}
}else if(y-j > 0) {
if (chmin(d[x*w+y][a][state], d[val][a][state])) {
mada.push_front(make_tuple(x*w+y,a,state));
}
}else if (i-x > 0) {
if (a+1 >= h*w+10) continue;
if (chmin(d[x*w+y][a+1][state], d[val][a][state])) {
mada.push_front(make_tuple(x*w+y,a+1,state));
}
}else if (x-i > 0) {
if (chmin(d[x*w+y][a][state], d[val][a][state])) {
mada.push_front(make_tuple(x*w+y,a,state));
}
}
}
for (int news: cango) {
if (news == 1) {
if (a+1 >= h*w+10) continue;
if (chmin(d[val][a+1][state|news], d[val][a][state])) {
mada.push_front(make_tuple(val,a+1,state|news));
}
}else {
if (chmin(d[val][a][state|news], d[val][a][state] + 1)) {
mada.push_back(make_tuple(val,a,state|news));
}
}
}
}
const int mx = 2e6;
vector<bool> p(mx,true);
p[0] = false;
p[1] = false;
for (int i=2; i<mx; i++) {
if (!p[i]) continue;
for (int j=2*i; j<mx; j+=i) {
p[j] = false;
}
}
vector<bool> hs((int)1e6);
vector<bool> ws((int)1e6);
for (int i=0; i<(int)1e6; i++) {
if (p[i] && p[i+geta_h]) hs[i] = 1;
if (p[i] && p[i+geta_w]) ws[i] = 1;
}
vector<int> ht((int)1e6, 1e9);
vector<int> wt((int)1e6, 1e9);
for (int i=(int)1e6-1; i>=0; i--){
if (hs[i]) ht[i]=0;
if (ws[i]) wt[i]=0;
}
for (int i=(int)1e6-2; i>=0; i--) {
chmin(ht[i], ht[i+1] + 1);
chmin(wt[i], wt[i+1] + 1);
}
ll ans = 1e9;
for (int a=0; a<h*w+10; a++) {
for (int state=0; state<4; state++) {
int b = d[gx*w+gy][a][state];
if (b > (int)1e8) continue;
//cout << a << ' ' << b << ' ' << state << endl;
if ((state & 1) == 0) if (ht[a] != 0) continue;
if ((state & 2) == 0) if (wt[b] != 0) continue;
chmin(ans, ll(ht[a] + wt[b] + a + b) * 2 + geta_h + geta_w);
}
}
if (ans > 1e8) {
cout << -1 << '\n';
}else {
cout << ans << '\n';
}
}
shobonvip