제출 #588059

#제출 시각아이디문제언어결과실행 시간메모리
588059Clan328분수 공원 (IOI21_parks)C++17
5 / 100
154 ms22284 KiB
#include "parks.h" #include <bits/stdc++.h> using namespace std; #define pb push_back struct Coord { int x, y, i; bool operator<(Coord other) const { if (y == other.y) { return x < other.x; } return y < other.y; } }; int n; vector<Coord> coords; std::vector<int> u, v, a, b; void connect(int i, int j) { if (coords[i].x == coords[j].x) { u.pb(coords[i].i); v.pb(coords[j].i); if (coords[i].x == 4) a.pb(coords[i].x+1); else a.pb(coords[i].x-1); b.pb(coords[i].y+1); } else if (coords[i].y == coords[j].y) { u.pb(coords[i].i); v.pb(coords[j].i); a.pb(coords[i].x+1); b.pb(coords[i].y-1); } } int construct_roads(std::vector<int> x, std::vector<int> y) { if (x.size() == 1) { build({}, {}, {}, {}); return 1; } n = x.size(); vector<pair<int, int>> yi(n); coords = vector<Coord>(n); for (int i = 0; i < n; i++) { coords[i] = {x[i], y[i], i}; } sort(coords.begin(), coords.end()); bool res = true; vector<int> visited(n); visited[0] = true; for (int i = 0; i < n-1; i++) { res &= visited[i]; if ((coords[i].y+2 == coords[i+1].y && coords[i].x == coords[i+1].x) || (coords[i].y == coords[i+1].y && coords[i].x+2 == coords[i+1].x)) { connect(i, i+1); visited[i+1] = true; } if (i+2 < n && ((coords[i].y+2 == coords[i+2].y && coords[i].x == coords[i+2].x) || (coords[i].y == coords[i+2].y && coords[i].x+2 == coords[i+2].x))) { connect(i, i+2); visited[i+2] = true; } } res &= visited[n-1]; if (!res) return 0; // int maxY = 0; // for (int i = 0; i < y.size(); i++) maxY = max(maxY, y[i]); // vvi mat(maxY/2-1, vi(3)), matIdx(maxY/2-1, vi(3)); // for (int i = 0; i < x.size(); i++) { // mat[x[i]/2-1][y[i]/2-1] = 1; // matIdx[x[i]/2-1][y[i]/2-1] = i; // } build(u, v, a, b); return 1; }
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