Submission #925825

#	Time	Username	Problem	Language	Result	Execution time	Memory
925825		Akshat369	Maze (JOI23_ho_t3)	C++17	0 / 100	1 ms	348 KiB

Main

#include <bits/stdc++.h>

using namespace std;
#define int long long
#define INF (int)1e18
#define endl '\n'
const int mod = 1000 * 1000 * 1000 + 7;
const int N = 100005;
#define f first
#define s second
#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define rrep(i, a, b) for(int i = (a); i > (b); i--)
#define vi vector<int>
#define pii pair<int, int>

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

int dx[4] = {1,0,-1,0};
int dy[4] = {0,1,0,-1};

struct edge{
    int xx , yy , val;
    bool operator < (const edge& other) const{
        return val < other.val;
    }
};

void Solve() {
    int r , c , n; cin>>r>>c>>n;
    int sr , sc; cin>>sr>>sc;
    int gr, gc; cin>>gr>>gc;
    vector<vector<int> > vis(r+3 , vector<int> (c+3));
    vector<vector<int> > mat(r+3 , vector<int> (c+3,-1));
    vector<vector<int> > dis(r+3 , vector<int> (c+1,1e18));
    for (int i = 1; i <= r; ++i) {
        for (int j = 1; j <= c; ++j) {
            char x; cin>>x;
            if (x=='.') mat[i][j]= 0;
            else mat[i][j] = 1;
        }
    }
    priority_queue<edge , vector<edge> > pq;
    pq.push({sr,sc,mat[sr][sc]});
    dis[sr][sc] = mat[sr][sc];
    while (!pq.empty()){
        auto node = pq.top();
        pq.pop();
        if (vis[node.xx][node.yy]) continue;
        vis[node.xx][node.yy] = true;
        dis[node.xx][node.yy] = node.val;

        for (int i = 0; i < 4; ++i) {
            if (mat[node.xx+dx[i]][node.yy + dy[i]]!= -1 && dis[node.xx][node.yy]+mat[node.xx+dx[i]][node.yy + dy[i]] < dis[node.xx+dx[i]][node.yy + dy[i]]){
                pq.push({node.xx + dx[i] , node.yy + dy[i],dis[node.xx][node.yy]+mat[node.xx+dx[i]][node.yy + dy[i]]});
            }
        }
    }
    cout<< dis[gr][gc] << endl;
}

int32_t main() {
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(false);
    cin.tie(0);



    int t = 1;
   // cin >> t;
    for (int i = 1; i <= t; i++) {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n";
    return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 19
• Subtask 3: 0 / 16
• Subtask 4: 0 / 19
• Subtask 5: 0 / 5
• Subtask 6: 0 / 19
• Subtask 7: 0 / 8
• Subtask 8: 0 / 6