Submission #895934

#TimeUsernameProblemLanguageResultExecution timeMemory
895934niterMaze (JOI23_ho_t3)C++14
8 / 100
271 ms15004 KiB
#include <bits/stdc++.h> #define loop(i,a,b) for(int i = (a); i < (b); i ++) #define pb push_back #define ins insert #define pii pair<int,int> #define ff first #define ss second #define op(x) cerr << #x << " = " << x << endl; #define opa(x) cerr << #x << " = " << x << ", "; #define spac cerr << ' '; #define entr cerr << endl; #define STL(x) cerr << #x << " : "; for(auto &qwe:x) cerr << qwe << ' '; cerr << endl; #define ARR(x, nnn) cerr << #x << " : "; loop(qwe,0,nnn) cerr << x[qwe] << ' '; cerr << endl; using namespace std; mt19937 RNG(chrono::steady_clock::now().time_since_epoch().count()); ostream& operator<<(ostream& os, pii A){ os << "[" << A.ff << ", " << A.ss << "]"; } inline bool check(int i, int j, int n, int m){ return i >= 0 && j >= 0 && i < n && j < m; } const int INF = (int)(1e9); const int dx[4] = {0, 1, 0, -1}; const int dy[4] = {1, 0, -1, 0}; vector<vector<char>> c; vector<vector<int>> dis; int main(){ ios::sync_with_stdio(false); cin.tie(0); int n, m, k; cin >> n >> m >> k; pii s, t; cin >> s.ff >> s.ss >> t.ff >> t.ss; s.ff--; s.ss--; t.ff--; t.ss--; c = vector<vector<char>>(n, vector<char>(m, ' ')); loop(i,0,n){ loop(j,0,m){ cin >> c[i][j]; } } priority_queue<pair<int,pii>, vector<pair<int,pii>>, greater<pair<int,pii>>> pq; pq.push({0, s}); dis = vector<vector<int>>(n, vector<int>(m, INF)); dis[s.ff][s.ss] = 0; while(!pq.empty()){ int nowx = pq.top().ss.ff; int nowy = pq.top().ss.ss; int nowd = pq.top().ff; pq.pop(); if(nowd != dis[nowx][nowy]) continue; loop(d,0,4){ int nx = nowx + dx[d]; int ny = nowy + dy[d]; if(!check(nx, ny, n, m)) continue; if(dis[nx][ny] > nowd + (c[nx][ny] == '#')){ dis[nx][ny] = nowd + (c[nx][ny] == '#'); pq.push({dis[nx][ny], {nx, ny}}); } } } cout << dis[t.ff][t.ss] << '\n'; } /* */

Compilation message (stderr)

Main.cpp: In function 'std::ostream& operator<<(std::ostream&, std::pair<int, int>)':
Main.cpp:16:84: warning: no return statement in function returning non-void [-Wreturn-type]
   16 | ostream& operator<<(ostream& os, pii A){ os << "[" << A.ff << ", " << A.ss << "]"; }
      |                                                                                    ^
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