(UPD: 2024-12-04 14:48 UTC) Judge is not working due to Cloudflare incident. (URL) We can do nothing about it, sorry. After the incident is resolved, we will grade all submissions.

Submission #272791

#TimeUsernameProblemLanguageResultExecution timeMemory
272791rqiSeats (IOI18_seats)C++14
100 / 100
3869 ms143260 KiB
#include "seats.h" #include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int, int> pi; typedef vector<int> vi; typedef vector<pi> vpi; typedef pair<ll, int> T; #define mp make_pair #define f first #define s second #define pb push_back #define ins insert const ll INF = 1e18; T ID = mp(INF, 0); T comb(T a, T b){ if(a.f == b.f) return mp(a.f, a.s+b.s); return min(a, b); } const int SZ = 1048576; T seg[2*SZ]; ll lazy[2*SZ]; void pull(int ind){ seg[ind] = comb(seg[2*ind], seg[2*ind+1]); } void push(int ind, int L, int R){ seg[ind].f+=lazy[ind]; if(L < R){ for(int i = 0; i < 2; i++){ lazy[2*ind+i]+=lazy[ind]; } } lazy[ind] = 0; return; } void upd(int lo, int hi, ll inc, int ind = 1, int L = 0, int R = SZ-1){ push(ind, L, R); if(L > hi || R < lo) return; if(lo <= L && R <= hi){ lazy[ind] = inc; push(ind, L, R); //cout << "UPD " << ind << " " << L << " " << R << " " << seg[ind].f << " " << seg[ind].s << "\n"; return; } int M = (L+R)/2; upd(lo, hi, inc, 2*ind, L, M); upd(lo, hi, inc, 2*ind+1, M+1, R); pull(ind); } T query(int lo, int hi, int ind = 1, int L = 0, int R = SZ-1){ push(ind, L, R); if(L > hi || R < lo) return ID; if(lo <= L && R <= hi){ //cout << ind << "\n"; return seg[ind]; } int M = (L+R)/2; return comb(query(lo, hi, 2*ind, L, M), query(lo, hi, 2*ind+1, M+1, R)); } const int mx = 1000005; int H, W; pi pos[mx]; vector<vi> stu; vpi rec = vpi{mp(0, 0), mp(0, 1), mp(1, 0), mp(1, 1)}; vpi rec2 = vpi{mp(-1, -1), mp(-1, 0), mp(0, -1), mp(0, 0)}; vector<pair<pi, bool>> fig[8]; ll val[8]; vector<pair<pi, int>> rot; bool works(int r, int c, pi dif){ r = r+dif.f; c = c+dif.s; if(r < 0 || H-1 < r) return 0; if(c < 0 || W-1 < c) return 0; return 1; } bool mode = 0; ll csum[mx]; void updSeat(int r, int c, int con, int typ){ bool good = 1; int lo = 0; int hi = H*W-1; for(auto u: fig[con]){ if(!works(r, c, u.f)){ good = 0; //cout << "NO WORK " << r << " " << c << " " << con << "\n"; break; } if(u.s == 1){ lo = max(lo, stu[r+u.f.f][c+u.f.s]); } else{ hi = min(hi, stu[r+u.f.f][c+u.f.s]-1); } } if(lo > hi) good = 0; if(!good) return; // cout << "updSeat: " << r << " " << c << " " << con << " " << typ << "\n"; // cout << "seg update " << lo << " " << hi << " " << val[con]*typ << "\n"; if(mode == 0){ csum[lo]+=val[con]*typ; csum[hi+1]-=val[con]*typ; } else upd(lo, hi, val[con]*typ); } void give_initial_chart(int _H, int _W, vi R, vi C) { for(int i = 0; i < 5; i++){ for(int k = 0; k < 4; k++){ bool x = 1; if(i == k) x = 0; fig[i].pb(mp(rec[k], x)); } } for(int i = 5; i < 8; i++){ fig[i].pb(mp(mp(0, 0), 1)); } fig[6].pb(mp(mp(0, 1), 1)); fig[7].pb(mp(mp(1, 0), 1)); val[0] = val[1] = val[2] = val[3] = 1000000000LL; val[4] = 1; val[5] = 1; val[6] = -1; val[7] = -1; for(int i = 0; i < 4; i++){ for(int j = 0; j < 5; j++){ rot.pb(mp(rec2[i], j)); } } for(int i = 5; i < 8; i++){ rot.pb(mp(mp(0, 0), i)); } rot.pb(mp(rec2[2], 6)); rot.pb(mp(rec2[1], 7)); // cout << "rot:\n"; // for(auto u: rot){ // cout << u.f.f << " " << u.f.s << " " << u.s << "\n"; // } // cout << "\n"; // for(int i = 0; i < 4; i++){ // int r = rec1[i].f; // int c = rec1[i].s; // for(int j = 0; j < 4; j++){ // for(int k = 0; k < 4; k++){ // bool x = 1; // if(j == k) x = 0; // fig[4*i+j].pb(mp(mp(r+rec2[k].f, c+rec2[k].s), x)); // } // val[4*i+j] = 1000000000LL; // } // } // for(int i = 0; i < 4; i++){ // int r = rec1[i].f; // int c = rec1[i].s; // for(int k = 0; k < 4; k++){ // fig[16+i].pb(mp(mp(r+rec2[k].f, c+rec2[k].s), 1)); // } // val[16+i] = 1; // } // for(int i = 0; i <= 4; i++){ // fig[20+i].pb(mp(mp(0, 0), 1)); // } // fig[21].pb(mp(mp(0, -1), 1)); // fig[22].pb(mp(mp(0, 1), 1)); // fig[23].pb(mp(mp(-1, 0), 1)); // fig[24].pb(mp(mp(1, 0), 1)); // val[20] = 1; // val[21] = val[22] = val[23] = val[24] = -1; for(int i = SZ; i < 2*SZ; i++){ seg[i] = mp(0, 1); } // cout << seg[1+SZ].f << " " << seg[1+SZ].s << "\n"; // T q1 = query(1, 1); // cout << q1.f << " " << q1.s << "\n"; // upd(1, 1, 5); // q1 = query(1, 1); // cout << q1.f << " " << q1.s << "\n"; // cout << "////////////////\n"; H = _H; W = _W; stu = vector<vi>(H, vi(W, 0)); for(int i = 0; i < H*W; i++){ pos[i] = mp(R[i], C[i]); stu[R[i]][C[i]] = i; } for(int i = 0; i < H; i++){ for(int j = 0; j < W; j++){ for(int k = 0; k < 8; k++){ updSeat(i, j, k, 1); } } } for(int i = 1; i < H*W; i++){ csum[i]+=csum[i-1]; } for(int i = 0; i < H*W; i++){ seg[i+SZ] = mp(csum[i], 1); } for(int i = SZ-1; i >= 1; i--){ pull(i); } mode = 1; // for(int i = 0; i < H*W; i++){ // T q1 = query(i, i); // cout << "query " << i << " " << q1.f << " " << q1.s << "\n";; // } // T q1 = query(0, H*W-1); // cout << "query " << " " << q1.f << " " << q1.s << "\n"; } int swap_seats(int a, int b) { //cout << "swap_seats " << a << " " << b << "\n"; pi pos1 = pos[a]; pi pos2 = pos[b]; set<pair<pi, int>> upds; for(auto u: rot){ upds.ins(mp(mp(pos1.f+u.f.f, pos1.s+u.f.s), u.s)); } for(auto u: rot){ upds.ins(mp(mp(pos2.f+u.f.f, pos2.s+u.f.s), u.s)); } // for(auto u: upds){ // cout << "upds " << u.f.f << " " << u.f.s << " " << u.s << " " << "\n"; // } for(auto u: upds){ updSeat(u.f.f, u.f.s, u.s, -1); } swap(pos[a], pos[b]); swap(stu[pos1.f][pos1.s], stu[pos2.f][pos2.s]); for(auto u: upds){ updSeat(u.f.f, u.f.s, u.s, 1); } // for(int i = 0; i < H*W; i++){ // T q1 = query(i, i); // cout << "query " << i << " " << q1.f << " " << q1.s << "\n";; // } T q = query(0, H*W-1); assert(q.f == 1); return q.s; }
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...