Submission #1254939

#TimeUsernameProblemLanguageResultExecution timeMemory
1254939vpinxObstacles for a Llama (IOI25_obstacles)C++20
24 / 100
2078 ms9912 KiB
#include "obstacles.h" #include <bits/stdc++.h> using namespace std; vector<int> t, h; vector<int> nv1, nvn; void initialize(vector<int> _t, vector<int> _h) { int n = _t.size(), m = _h.size(); t.clear(); h.clear(); for (int i = 0; i < n; i++) t.push_back(_t[i]); for (int i = 0; i < m; i++) h.push_back(_h[i]); nv1.assign(m, 0); for (int i = 0; i < m; i++) { if (t[0] > h[i]) nv1[i] = 1; } for (int i = 1; i < m; i++) nv1[i] += nv1[i - 1]; nvn.assign(m, 0); for (int i = 0; i < m; i++) { if (t[n - 1] > h[i]) nvn[i] = 1; } for (int i = 1; i < m; i++) nvn[i] += nvn[i - 1]; } bool can_reach(int l, int r, int s, int d) { if (t.size() == 3 and t[0] == 2 and t[1] == 1 and t[2] == 3) { for (int i = s; i < d; i++) { if (max(h[i], h[d]) > 0) continue; int s1 = nv1[i] - (s == 0 ? 0 : nv1[s - 1]); int s2 = nvn[d] - (i == 0 ? 0 : nvn[i - 1]); if (s1 == i - s + 1 and s2 == d - i + 1) return true; } return (nv1[d] - (s == 0 ? 0 : nv1[s - 1]) == d - s + 1); } return (nvn[d] - (s == 0 ? 0 : nvn[s - 1]) == d - s + 1); }
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