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제출 #81209

#제출 시각아이디문제언어결과실행 시간메모리
81209cki86201자리 배치 (IOI18_seats)C++11
100 / 100
3874 ms77716 KiB
#include "seats.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #include <memory.h> #include <math.h> #include <assert.h> #include <stack> #include <queue> #include <map> #include <set> #include <string> #include <algorithm> #include <iostream> #include <functional> #include <unordered_set> using namespace std; typedef long long ll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; #define Fi first #define Se second #define pb(x) push_back(x) #define szz(x) (int)x.size() #define rep(i,n) for(int i=0;i<n;i++) #define all(x) x.begin(),x.end() typedef tuple<int, int, int> t3; int T[1<<21], A[1<<21], cnt[1<<21]; int R[1000010], C[1000010]; int N, M, P; void init(int rt, int l, int r) { cnt[rt] = r - l + 1; if(l == r) return; int m = (l + r) >> 1; init(rt<<1, l, m); init(rt<<1|1, m+1, r); } inline void pushup(int rt) { if(T[rt<<1] == T[rt<<1|1]) cnt[rt] = cnt[rt<<1] + cnt[rt<<1|1], T[rt] = T[rt<<1]; else if(T[rt<<1] < T[rt<<1|1]) cnt[rt] = cnt[rt<<1], T[rt] = T[rt<<1]; else cnt[rt] = cnt[rt<<1|1], T[rt] = T[rt<<1|1]; } void add(int rt, int l, int r, int s, int e, int c) { if(s <= l && r <= e) { T[rt] += c; A[rt] += c; return; } if(A[rt]) { T[rt<<1] += A[rt]; A[rt<<1] += A[rt]; T[rt<<1|1] += A[rt]; A[rt<<1|1] += A[rt]; A[rt] = 0; } int m = (l + r) >> 1; if(s <= m) add(rt<<1, l, m, s, e, c); if(m < e) add(rt<<1|1, m+1, r, s, e, c); pushup(rt); } void add(int l, int r, int v) { add(1, 1, P, l, r, v); } int rval[1000010]; void get_val(int x, int y, int rr[]) { int rz = 0; for(int dx : {0,1}) for(int dy : {0,1}) { int ni = x + dx, nj = y + dy, val = P + 1; if(1 <= ni && ni <= N && 1 <= nj && nj <= M) { val = rval[(ni-1)*M+(nj-1)]; } rr[rz++] = val; } sort(rr, rr+4); } void give_initial_chart(int H, int W, std::vector<int> tR, std::vector<int> tC) { N = H; M = W; P = N * M; init(1, 1, P); rep(i, P) R[i + 1] = tR[i] + 1, C[i + 1] = tC[i] + 1; for(int i=1;i<=P;i++) rval[(R[i]-1)*M+(C[i]-1)] = i; rep(i, N+1) rep(j, M+1) { int tt[4]; get_val(i, j, tt); if(tt[0]<tt[1]) add(tt[0], tt[1]-1, 1); if(tt[2]<tt[3]) add(tt[2], tt[3]-1, 100); } } void change(int r, int c, int x) { for(int dx:{-1,0}) for(int dy:{-1,0}) { int tt[4]; get_val(r+dx, c+dy, tt); if(tt[0]<tt[1]) add(tt[0], tt[1]-1, -1); if(tt[2]<tt[3]) add(tt[2], tt[3]-1, -100); } rval[(r-1)*M+(c-1)] = x; for(int dx:{-1,0}) for(int dy:{-1,0}) { int tt[4]; get_val(r+dx, c+dy, tt); if(tt[0]<tt[1]) add(tt[0], tt[1]-1, 1); if(tt[2]<tt[3]) add(tt[2], tt[3]-1, 100); } } int swap_seats(int a, int b) { ++a; ++b; change(R[a], C[a], b); change(R[b], C[b], a); swap(R[a], R[b]); swap(C[a], C[b]); return cnt[1]; }
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