Submission #736316

#TimeUsernameProblemLanguageResultExecution timeMemory
736316jk410Digital Circuit (IOI22_circuit)C++17
2 / 100
3067 ms32464 KiB
#include "circuit.h" #include <bits/stdc++.h> using namespace std; typedef long long ll; const ll MOD = 1000002022; int n, m; vector<int> p, a; vector<int> child[2023]; ll dp[1023], dp2[2023][2023]; ll dpAll[1023]; ll getDPAll(int v) { ll& ret = dpAll[v] = (int)child[v].size(); for (int i : child[v]) { if (i < n) ret = ret * getDPAll(i) % MOD; } return ret; } void init(int _n, int _m, vector<int> _p, vector<int> _a) { n = _n; m = _m; p = _p; a = _a; for (int i = 1; i < n + m; i++) child[p[i]].push_back(i); getDPAll(0); } void getDP(int v) { int sz = (int)child[v].size(); for (int i : child[v]) { if (i < n) getDP(i); } memset(dp2, 0, sizeof(dp2)); dp2[0][0] = 1; ll tmp = 1; for (int i = 1; i <= sz; i++) { int cur = child[v][i - 1]; ll tmp2 = 0; for (int j = 1; j <= i; j++) { if (cur < n) { tmp = tmp * dpAll[cur] % MOD; dp2[i][j] = (dp2[i - 1][j - 1] * dp[cur] % MOD + dp2[i - 1][j] * ((dpAll[cur] - dp[cur] + MOD) % MOD) % MOD) % MOD; } else { if (a[cur - n]) dp2[i][j] = dp2[i - 1][j - 1]; else dp2[i][j] = dp2[i - 1][j]; } tmp2 = (tmp2 + dp2[i][j]) % MOD; } dp2[i][0] = (tmp - tmp2 + MOD) % MOD; } dp[v] = 0; for (int i = 1; i <= sz; i++) dp[v] = (dp[v] + dp2[sz][i] * i % MOD) % MOD; } int count_ways(int l, int r) { for (int i = l - n; i <= r - n; i++) a[i] ^= 1; getDP(0); return dp[0]; }
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