結果
問題 | No.2855 Move on Grid |
ユーザー |
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提出日時 | 2024-08-25 14:56:19 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 1,083 ms / 3,000 ms |
コード長 | 5,217 bytes |
コンパイル時間 | 1,059 ms |
コンパイル使用メモリ | 118,980 KB |
最終ジャッジ日時 | 2025-02-24 01:18:20 |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
other | AC * 40 |
ソースコード
#include <algorithm> #include <iostream> #include <iomanip> #include <limits.h> #include <map> #include <math.h> #include <numeric> #include <queue> #include <set> #include <sstream> #include <string> #include <utility> #include <vector> #include <stack> #include <complex> using namespace std; #define rep(i, n) for (int i = 0; i < n; i++) #define rep1(i, n) for (int i = 1; i < n + 1; i++) #define rev(i, n) for (int i = n - 1; i >= 0; i--) #define all(A) A.begin(), A.end() #define itr(A, l, r) A.begin() + l, A.begin() + r #define debug(var) cout << #var << " = " << var << endl; typedef long long ll; template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &p) { os << "(" << p.first << "," << p.second << ")"; return os; } template <typename T1, typename T2> istream &operator>>(istream &is, pair<T1, T2> &p) { is >> p.first >> p.second; return is; } template <typename T> ostream &operator<<(ostream &os, const vector<T> &v) { for (int i = 0; i < (int)v.size(); i++) { os << v[i] << (i + 1 != (int)v.size() ? " " : ""); } return os; } template <typename T> ostream &operator<<(ostream &os, const vector<vector<T>> &v) { for (int i = 0; i < (int)v.size(); i++) { os << v[i] << endl; } return os; } template <typename T> ostream &operator<<(ostream &os, const vector<vector<vector<T>>> &v) { int n = v.size(); int m = v[0].size(); int p = v[0][0].size(); rep(k, p) { os << "k = " << k << endl; rep(i, n) { rep(j, m) { os << v[i][j][k]; if (j < m - 1) { os << " "; } else { os << endl; } } } } return os; } template <typename T> istream &operator>>(istream &is, vector<T> &v) { for (T &in : v) is >> in; return is; } template <typename T, typename S> ostream &operator<<(ostream &os, map<T, S> &mp) { for (auto &[key, val] : mp) { os << key << ":" << val << " "; } cout << endl; return os; } template <typename T> ostream &operator<<(ostream &os, set<T> st) { auto itr = st.begin(); for (int i = 0; i < (int)st.size(); i++) { os << *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; } template <typename T> ostream &operator<<(ostream &os, multiset<T> st) { auto itr = st.begin(); for (int i = 0; i < (int)st.size(); i++) { os << *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; } template <typename T> ostream &operator<<(ostream &os, queue<T> q) { while (q.size()) { os << q.front() << " "; q.pop(); } return os; } template <typename T> ostream &operator<<(ostream &os, deque<T> q) { while (q.size()) { os << q.front() << " "; q.pop_front(); } return os; } template <typename T> ostream &operator<<(ostream &os, stack<T> st) { while (st.size()) { os << st.top() << " "; st.pop(); } return os; } template <typename T> ostream &operator<<(ostream &os, priority_queue<T> pq) { while (pq.size()) { os << pq.top() << " "; pq.pop(); } return os; } template <typename T> ostream &operator<<(ostream &os, priority_queue<T, vector<T>, greater<T>> mpq) { while (mpq.size()) { os << mpq.top() << " "; mpq.pop(); } return os; } int main(){ int n,m,k; cin >> n >> m >> k; vector<vector<int>> maze(n,vector<int>(m)); cin >> maze; // cout << maze << endl; int ok = 0; int ng = 1e9+1; while(abs(ng-ok)>1){ int mid = ng+ok; mid /= 2; // debug(mid); vector<vector<int>> dp(n,vector<int>(m,1e9)); // dp[0][0] = a[0][0] < mid; using S = pair<int,pair<int,int>>; priority_queue<S,vector<S>, greater<S>> pq; pq.push({maze[0][0]<mid,{0,0}}); while(pq.size()){ auto [now_weight,now_pos] = pq.top(); pq.pop(); auto [cx,cy] = now_pos; if(now_weight >= dp[cx][cy]){ continue; } dp[cx][cy] = now_weight; // vector<int> dx = {1,-1,0,0}; // vector<int> dy = {0,0,1,-1}; vector<pair<int, int>> dxy = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}}; for(auto [dx,dy] : dxy){ int nx = cx+dx; int ny = cy+dy; if(nx < 0 || n <= nx){ continue; } if(ny < 0 || m <= ny){ continue; } int next_weight = now_weight + (maze[nx][ny] < mid); // debug(next_weight); if(next_weight >= dp[nx][ny]){ continue; } pq.push({next_weight,{nx,ny}}); } } // cout << dp << endl; if(dp[n-1][m-1]<=k){ ok = mid; }else{ ng = mid; } } cout << ok << endl; }