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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int N, M;
  6.     long long Sx, Sy;
  7.     cin >> N >> M >> Sx >> Sy;
  8.  
  9.     map<long long, set<long long>> row_houses, col_houses;
  10.  
  11.     for (int i = 0; i < N; i++) {
  12.         long long x, y;
  13.         cin >> x >> y;
  14.         row_houses[y].insert(x);
  15.         col_houses[x].insert(y);
  16.     }
  17.  
  18.     vector<pair<char, long long>> moves(M);
  19.     for (int i = 0; i < M; i++) {
  20.         cin >> moves[i].first >> moves[i].second;
  21.     }
  22.  
  23.     set<pair<long long, long long>> visitedHouses;
  24.  
  25.     long long x = Sx, y = Sy;
  26.  
  27.     for (auto move : moves) {
  28.         char dir = move.first;
  29.         long long dist = move.second;
  30.  
  31.         if (dir == 'U') {
  32.             auto it = col_houses[x].upper_bound(y); 
  33.             while (it != col_houses[x].end() && *it <= y + dist) {
  34.                 visitedHouses.insert({x, *it});
  35.                 it++;
  36.             }
  37.             y += dist; 
  38.         } else if (dir == 'D') {
  39.             auto it = col_houses[x].lower_bound(y); 
  40.             while (it != col_houses[x].begin() && *prev(it) >= y - dist) {
  41.                 --it;
  42.                 visitedHouses.insert({x, *it});
  43.             }
  44.             y -= dist; 
  45.         } else if (dir == 'L') {
  46.             auto it = row_houses[y].lower_bound(x); 
  47.             while (it != row_houses[y].begin() && *prev(it) >= x - dist) {
  48.                 it--;
  49.                 visitedHouses.insert({*it, y});
  50.             }
  51.             x -= dist; 
  52.         } else if (dir == 'R') {
  53.             auto it = row_houses[y].upper_bound(x); 
  54.             while (it != row_houses[y].end() && *it <= x + dist) {
  55.                 visitedHouses.insert({*it, y});
  56.                 it++;
  57.             }
  58.             x += dist; 
  59.         }
  60.     }
  61.  
  62.     cout << x << " " << y << " " << visitedHouses.size() << endl;
  63.     return 0;
  64. }
  65.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
copy 
3 4 3 2
2 2
3 3
2 1
L 2
D 1
R 1
U 2
stdout
copy 
2 3 2
https://ideone.com/hRPBdT
language:
C++14 (clang 8.0)
created:
21 hours ago
visibility:
public

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