Submission #1176531

#TimeUsernameProblemLanguageResultExecution timeMemory
1176531JelalTkmPainting Walls (APIO20_paint)C++20
100 / 100
174 ms13708 KiB
#include <bits/stdc++.h> #include "paint.h" #pragma GCC optimize ("O3") #pragma GCC target ("sse4") using namespace std; // #define int long long int // const int N = 1000 + 10; // const int md = 1e9 + 7; // const int INF = 5e6; int minimumInstructions(int n, int m, int k, vector<int> c, vector<int> a, vector<vector<int>> b) { vector<vector<int>> e(k + 1, vector<int> ()); for (int i = 0; i < m; i++) for (auto j: b[i]) e[j].push_back(i); vector<pair<pair<int, int>, pair<int, int>>> p(m + 1); for (int i = 0; i <= m; i++) { p[i].first = {-1, 0}; p[i].second = {-1, 0}; } vector<int> v; for (int i = n - 1; i >= 0; i--) { int mx = 0; for (auto j: e[c[i]]) { int y = (j + 1) % m; p[j].second = p[j].first; p[j].first.first = 1; p[j].first.second = i; if (p[y].first.second == -1 || p[y].first.second == i + 1) { p[j].first.first = p[y].first.first + 1; } if (p[y].second.second == -1 || p[y].second.second == i + 1) { p[j].first.first = max(p[j].first.first, p[y].second.first + 1); } p[j].first.first = min(p[j].first.first, m); mx = max(mx, p[j].first.first); } if (mx == m) v.push_back(i); } sort(v.begin(), v.end()); int ans = 0; int el = n - 1; while (el != -1) { int l = lower_bound(v.begin(), v.end(), (el - m + 1)) - v.begin(); if (l == (int) v.size() || v[l] > el) { ans = -1; break; } else { ans++; el = v[l] - 1; } } return ans; } // int32_t main(int32_t argc, char *argv[]) { // ios::sync_with_stdio(false); // cin.tie(nullptr); // int T = 1; // // cin >> T; // while (T--) { // int n, m, k; // cin >> n >> m >> k; // vector<int> c(n); // for (int i = 0; i < n; i++) // cin >> c[i]; // vector<int> a(m); // vector<vector<int>> b(m, vector<int> ()); // for (int i = 0; i < m; i++) { // cin >> a[i]; // for (int j = 0; j < a[i]; j++) { // int x; // cin >> x; // b[i].push_back(x); // } // } // cout << minimumInstructions(n, m, k, c, a, b) << '\n'; // } // return 0; // }
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