oj.uz

Submission #395015

# Submission time Handle Problem Language Result Execution time Memory
395015 2021-04-27T15:36:56 Z soroush Portals (BOI14_portals) C++17
100 / 100
 915 ms 153136 KB 
//曇り空 のぞいた予感
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int , int> pii;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int maxn = 1010;
const ll mod = 1e9+7;

#define pb push_back
#define endl '\n'
#define dokme(x) cout << x , exit(0)
#define ms(x , y) memset(x , y , sizeof x)
ll pw(ll a, ll b, ll md = mod){ll res = 1;while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}

int n , m;
char c[maxn][maxn];
int dist[maxn][maxn];
int nie[maxn][maxn];
struct tr{
	int x , y , w;
	friend bool operator < (tr a , tr b){
		return a.w > b.w;
	}
};
pii s , t;
vector < tr > adj[maxn][maxn];
priority_queue < tr > pq;
queue < pii > q;
bool mark[maxn][maxn];

void dijk(){
	ms(dist , 63);
	dist[s.first][s.second] = 0;
	pq.push({s.first, s.second , 0});
	while(pq.size()){
		auto v = pq.top();
		pq.pop();
		if(mark[v.x][v.y])continue;
		if(v.x == t.first and v.y == t.second)dokme(v.w);
		mark[v.x][v.y] = 1;
		for(tr u : adj[v.x][v.y])
			if(dist[u.x][u.y] > v.w + u.w)
				dist[u.x][u.y] = v.w + u.w , pq.push({u.x , u.y , v.w + u.w});
	}
}

pii tmp[maxn][maxn];

int32_t main(){
	ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin >> n >> m;
	for(int i = 1 ; i <= n ; i ++){
		cin >> (c[i]+1);
		for(int j = 1 ; j <= m ; j ++)
			if(c[i][j] == 'C')
				t = {i , j};
			else if(c[i][j] == 'S')
				s = {i , j};
	}
	ms(nie , -1);
	for(int i = 1 ; i <= n ; i ++)
		for(int j = 1 ; j <= m ; j ++)
			if(c[i][j] == '#')
				nie[i][j] = 0 , q.push({i , j});
	for(int i = 1 ; i <= m ; i ++)
		nie[0][i] = 0 , q.push({0 , i}),
		nie[n + 1][i] = 0 , q.push({n + 1 , i});
	for(int i = 1 ; i <= n ; i ++)
		nie[i][0] = 0 , q.push({i , 0}),
		nie[i][m+1] = 0 , q.push({i , m+1});
	while(q.size()){
		pii v = q.front();
		q.pop();
		if(v.first > 1){
			if(nie[v.first - 1][v.second] == -1)
				nie[v.first - 1][v.second] = nie[v.first][v.second] + 1 , 
				q.push({v.first - 1 , v.second});
		}
		if(v.first < n){
			if(nie[v.first + 1][v.second] == -1)
				nie[v.first + 1][v.second] = nie[v.first][v.second] + 1,
				q.push({v.first + 1 , v.second});
		}
		if(v.second > 1){
			if(nie[v.first][v.second - 1] == -1)
				nie[v.first][v.second - 1] = nie[v.first][v.second] + 1,
				q.push({v.first , v.second-1});
		}
		if(v.second < m){
			if(nie[v.first][v.second + 1] == -1)
				nie[v.first][v.second + 1] = nie[v.first][v.second] + 1,
				q.push({v.first , v.second+1});
		}
	}
	for(int i = 1 ; i <= n ; i ++)
		for(int j = 1 ; j <= m ; j ++){
			if(c[i][j] == '#')continue;
			if(i > 1){
				if(c[i-1][j] != '#')adj[i][j].pb({i-1 , j , 1});
			}
			if(i < n){
				if(c[i+1][j] != '#')adj[i][j].pb({i+1 , j , 1});
			}
			if(j > 1){
				if(c[i][j-1] != '#')adj[i][j].pb({i , j-1 , 1});
			}
			if(j < m){
				if(c[i][j+1] != '#')adj[i][j].pb({i , j+1 , 1});
			}
		}
	
	for(int i = 1 ; i <= n; i ++){
		c[i][0] = '#';
		for(int j = 1 ; j <= m ; j ++){
			if(c[i][j] == '#')continue;
			if(c[i][j-1] == '#')tmp[i][j] = {i , j};
			else tmp[i][j] = tmp[i][j-1];
			adj[i][j].pb({tmp[i][j].first , tmp[i][j].second , nie[i][j]});
		}
	}
	for(int i = 1 ; i <= n; i ++){
		c[i][m+1] = '#';
		for(int j = m ; j >= 1; j --){
			if(c[i][j] == '#')continue;
			if(c[i][j+1] == '#')tmp[i][j] = {i , j};
			else tmp[i][j] = tmp[i][j+1];
			adj[i][j].pb({tmp[i][j].first , tmp[i][j].second , nie[i][j]});
		}
	}
	for(int i = 1 ; i <= m; i ++){
		c[0][i] = '#';
		for(int j = 1 ; j <= n ; j ++){
			if(c[j][i] == '#')continue;
			if(c[j-1][i] == '#')tmp[j][i] = {j , i};
			else tmp[j][i] = tmp[j-1][i];
			adj[j][i].pb({tmp[j][i].first , tmp[j][i].second , nie[j][i]});
		}
	}
	for(int i = 1 ; i <= m; i ++){
		c[n+1][i] = '#';
		for(int j = n ; j >= 1 ; j --){
			if(c[j][i] == '#')continue;
			if(c[j+1][i] == '#')tmp[j][i] = {j , i};
			else tmp[j][i] = tmp[j+1][i];
			adj[j][i].pb({tmp[j][i].first , tmp[j][i].second , nie[j][i]});
		}
	}
	dijk();
	return(0);
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 32204 KB Output is correct
2 Correct 19 ms 32268 KB Output is correct
3 Correct 19 ms 32332 KB Output is correct
4 Correct 20 ms 32276 KB Output is correct
5 Correct 19 ms 32332 KB Output is correct
6 Correct 22 ms 32332 KB Output is correct
7 Correct 20 ms 32332 KB Output is correct
8 Correct 21 ms 32336 KB Output is correct
9 Correct 20 ms 32232 KB Output is correct
10 Correct 21 ms 32296 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 32204 KB Output is correct
2 Correct 20 ms 32332 KB Output is correct
3 Correct 20 ms 32224 KB Output is correct
4 Correct 23 ms 32204 KB Output is correct
5 Correct 20 ms 32360 KB Output is correct
6 Correct 23 ms 32264 KB Output is correct
7 Correct 27 ms 32340 KB Output is correct
8 Correct 24 ms 32360 KB Output is correct
9 Correct 22 ms 32864 KB Output is correct
10 Correct 22 ms 32844 KB Output is correct
11 Correct 22 ms 32744 KB Output is correct
12 Correct 22 ms 32744 KB Output is correct
13 Correct 22 ms 32844 KB Output is correct
14 Correct 20 ms 32208 KB Output is correct
15 Correct 21 ms 32740 KB Output is correct
16 Correct 22 ms 32264 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 32228 KB Output is correct
2 Correct 21 ms 32344 KB Output is correct
3 Correct 20 ms 32332 KB Output is correct
4 Correct 21 ms 32352 KB Output is correct
5 Correct 35 ms 36556 KB Output is correct
6 Correct 37 ms 36576 KB Output is correct
7 Correct 38 ms 36892 KB Output is correct
8 Correct 37 ms 36736 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32228 KB Output is correct
2 Correct 21 ms 32332 KB Output is correct
3 Correct 22 ms 32324 KB Output is correct
4 Correct 21 ms 32228 KB Output is correct
5 Correct 21 ms 32332 KB Output is correct
6 Correct 20 ms 32356 KB Output is correct
7 Correct 20 ms 32332 KB Output is correct
8 Correct 20 ms 32232 KB Output is correct
9 Correct 21 ms 32904 KB Output is correct
10 Correct 22 ms 32916 KB Output is correct
11 Correct 24 ms 32740 KB Output is correct
12 Correct 22 ms 32796 KB Output is correct
13 Correct 23 ms 32844 KB Output is correct
14 Correct 40 ms 36524 KB Output is correct
15 Correct 40 ms 36548 KB Output is correct
16 Correct 37 ms 36804 KB Output is correct
17 Correct 36 ms 36936 KB Output is correct
18 Correct 39 ms 37416 KB Output is correct
19 Correct 36 ms 38092 KB Output is correct
20 Correct 43 ms 38204 KB Output is correct
21 Correct 36 ms 36444 KB Output is correct
22 Correct 36 ms 36560 KB Output is correct
23 Correct 40 ms 36804 KB Output is correct
24 Correct 41 ms 38216 KB Output is correct
25 Correct 21 ms 32224 KB Output is correct
26 Correct 20 ms 32844 KB Output is correct
27 Correct 20 ms 32228 KB Output is correct
28 Correct 35 ms 36812 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 32204 KB Output is correct
2 Correct 21 ms 32328 KB Output is correct
3 Correct 21 ms 32332 KB Output is correct
4 Correct 21 ms 32224 KB Output is correct
5 Correct 20 ms 32332 KB Output is correct
6 Correct 20 ms 32292 KB Output is correct
7 Correct 19 ms 32332 KB Output is correct
8 Correct 21 ms 32332 KB Output is correct
9 Correct 22 ms 32868 KB Output is correct
10 Correct 23 ms 32920 KB Output is correct
11 Correct 24 ms 32744 KB Output is correct
12 Correct 21 ms 32748 KB Output is correct
13 Correct 21 ms 32852 KB Output is correct
14 Correct 36 ms 36468 KB Output is correct
15 Correct 38 ms 36560 KB Output is correct
16 Correct 40 ms 36840 KB Output is correct
17 Correct 36 ms 36820 KB Output is correct
18 Correct 39 ms 37444 KB Output is correct
19 Correct 36 ms 38072 KB Output is correct
20 Correct 39 ms 38244 KB Output is correct
21 Correct 35 ms 36464 KB Output is correct
22 Correct 36 ms 36544 KB Output is correct
23 Correct 37 ms 36780 KB Output is correct
24 Correct 663 ms 124292 KB Output is correct
25 Correct 915 ms 153136 KB Output is correct
26 Correct 499 ms 152260 KB Output is correct
27 Correct 631 ms 152860 KB Output is correct
28 Correct 609 ms 109924 KB Output is correct
29 Correct 623 ms 111892 KB Output is correct
30 Correct 627 ms 113512 KB Output is correct
31 Correct 41 ms 38212 KB Output is correct
32 Correct 785 ms 152784 KB Output is correct
33 Correct 21 ms 32204 KB Output is correct
34 Correct 23 ms 32804 KB Output is correct
35 Correct 570 ms 126976 KB Output is correct
36 Correct 20 ms 32204 KB Output is correct
37 Correct 36 ms 36724 KB Output is correct
38 Correct 593 ms 121672 KB Output is correct
39 Correct 441 ms 97092 KB Output is correct