Submission #835010

#TimeUsernameProblemLanguageResultExecution timeMemory
835010pavementDigital Circuit (IOI22_circuit)C++17
7 / 100
3080 ms4108 KiB
#include "circuit.h" #include <bits/stdc++.h> using namespace std; #define pb push_back using ll = long long; const int MOD = (int)1e9 + 2022; int N, M; vector<int> A; vector<vector<int> > adj; void init(int N, int M, vector<int> P, vector<int> A) { ::N = N; ::M = M; ::A = A; adj.resize(N + M); for (int i = 1; i < N + M; i++) { adj[P[i]].pb(i); } } int count_ways(int L, int R) { for (int i = L - N; i <= R - N; i++) { A[i] = !A[i]; } vector<int> tot_mem(N + M, -1), dp_mem(N + M, -1); function<int(int)> tot = [&](int u) { if (tot_mem[u] != -1) { return tot_mem[u]; } if (u >= N) { return tot_mem[u] = 1; } int ret = (int)(adj[u].size()); for (auto v : adj[u]) { ret = ((ll)ret * (ll)tot(v)) % MOD; } return tot_mem[u] = ret; }; function<int(int)> dp = [&](int u) { if (dp_mem[u] != -1) { return dp_mem[u]; } if (u >= N) { return dp_mem[u] = A[u - N]; } int ret = 0; for (int bm = 0; bm < (1 << (int)adj[u].size()); bm++) { int cur = __builtin_popcount(bm); for (int i = 0; i < (int)adj[u].size(); i++) { int tmp = (bm & (1 << i) ? dp(adj[u][i]) : tot(adj[u][i]) - dp(adj[u][i])) % MOD; if (tmp < 0) { tmp += MOD; } cur = (ll)cur * (ll)tmp % MOD; } ret = (ret + cur) % MOD; } return dp_mem[u] = ret; }; return dp(0); }
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