Submission #1264898

#TimeUsernameProblemLanguageResultExecution timeMemory
1264898silentloop디지털 회로 (IOI22_circuit)C++20
2 / 100
3008 ms7552 KiB
#include <bits/stdc++.h> #define ll long long #define sz(x) int(x.size()) #define forn(i, n) for (i = 0; i < n; i++) #define all(x) x.begin(), x.end() #define pb push_back #define mp make_pair #define fr first #define se second using namespace std; const int MAXN = 2e5 + 1; const int MOD = 1000002022; vector<ll> grafo[MAXN]; ll val[MAXN], hijos[MAXN]; ll n, m, tot = 0; pair<ll, ll> dfs(ll nod) // fr: posibilidades activo, se: posibilidades apagado { if (nod >= n) return {val[nod], !val[nod]}; pair<ll, ll> cant = {0, 0}; ll i=0, tot=1; for (auto k : grafo[nod]) { i++; pair<ll,ll>a=dfs(k); cant.fr=(cant.fr+(a.fr*tot)%MOD)%MOD; tot=(tot*(a.fr+a.se)%MOD)%MOD; } cant.se=tot*(hijos[nod]-1)%MOD; cant.se=(cant.se-cant.fr)%MOD; if(cant.se<0) cant.se=cant.se+MOD; return cant; } void calc() { pair<ll, ll> a = dfs(0); tot = a.fr; } ll in(ll nod) { hijos[nod] = 1; for (auto k : grafo[nod]) { hijos[nod] += in(k); } return hijos[nod]; } void init(int N, int M, std::vector<int> P, std::vector<int> A) { ll i; for (i = 1; i < sz(P); i++) grafo[P[i]].pb(i); for (i = 0; i < sz(A); i++) val[i + N] = A[i]; in(0); n = N; m = M; } int count_ways(int L, int R) { ll i; for (i = L; i <= R; i++) val[i] = !val[i]; calc(); return tot; }
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