제출 #1037823

#제출 시각아이디문제언어결과실행 시간메모리
1037823dwuy9월 (APIO24_september)C++17
100 / 100
329 ms23816 KiB
/** - dwuy -       />  フ       |  _  _|       /`ミ _x ノ      /      |     /  ヽ   ?  / ̄|   | | |  | ( ̄ヽ__ヽ_)_)  \二つ **/ #include "september.h" #include <bits/stdc++.h> #define fastIO ios_base::sync_with_stdio(false); cin.tie(NULL) #define file(a) freopen(a".inp","r",stdin); freopen(a".out", "w",stdout) #define fi first #define se second #define endl "\n" #define len(s) (int)((s).size()) #define MASK(k)(1LL<<(k)) #define TASK "test" using namespace std; typedef tuple<int, int, int> tpiii; typedef pair<double, double> pdd; typedef pair<int, int> pii; typedef long long ll; const long long OO = 1e18; const int MOD = 1e9 + 7; const int INF = 1e9; struct SMT{ int n; vector<int> tree; SMT(int n=0){ this->n = n; this->tree.assign(n<<2|3, 0); } void update(int pos, int val){ int id = 1; for(int lo=1, hi=n; lo<hi;){ int mid = (lo + hi)>>1; if(pos <= mid) hi = mid, id = id<<1; else lo = mid + 1, id = id<<1 | 1; } tree[id] = max(tree[id], val); for(id>>=1; id; id>>=1) tree[id] = max(tree[id<<1], tree[id<<1|1]); } int get(int l, int r, int id, const int &u, const int &v){ if(l>v || r<u) return 0; if(l>=u && r<=v) return tree[id]; int mid = (l + r)>>1; return max(get(l, mid, id<<1, u, v), get(mid + 1, r, id<<1|1, u, v)); } int get(int l, int r){ return get(1, n, 1, l, r); } }; int solve(int N, int M, std::vector<int> F, std::vector<std::vector<int>> S) { int ID = 0; vector<int> num(N + 5, 0); vector<int> clo(N + 5, 0); vector<vector<int>> mx(M + 1, vector<int>(N + 5, 0)); vector<vector<int>> G(N + 5, vector<int>()); for(int i=1; i<N; i++) G[F[i]].push_back(i); function<void(int)> dfs = [&](int u){ num[u] = ++ID; for(int v: G[u]){ dfs(v); } clo[u] = ID; }; dfs(0); for(int t=0; t<M; t++){ SMT smt(N); for(int i=N-2; i>=0; i--){ mx[t][i] = smt.get(num[S[t][i]], clo[S[t][i]]); smt.update(num[S[t][i]], i); } } int res = 0; int cmx = 0; int cur = 0; vector<int> cnt(N + 5, 0); for(int i=0; i<N-1; i++){ for(int j=0; j<M; j++){ cmx = max(cmx, mx[j][i]); cnt[S[j][i]]++; if(cnt[S[j][i]] == M) cur++; } if(cmx <= i && cur == i + 1) res++; } return res; }
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