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Submission #492211

#TimeUsernameProblemLanguageResultExecution timeMemory
492211peti1234Seats (IOI18_seats)C++17
100 / 100
3342 ms85424 KiB
#include <bits/stdc++.h> using namespace std; const int c=1000002, p=1048576; int n, m, k, sor[c], pos[c], oszlop[c], kezd[2*p], veg[2*p], kert[2*p], kdb[2*p], lp[2*p], t[4]; bool jo[c]; int st, fi, ert; void add(int a) { int k=kezd[a], v=veg[a], x=2*a, y=2*a+1; if (st>v || fi<k) return; if (st<=k && v<=fi) lp[a]+=ert; else { add(x), add(y); int p=kert[x]+lp[x], q=kert[y]+lp[y]; kert[a]=min(p, q); kdb[a]=0; if (kert[a]==p) kdb[a]+=kdb[x]; if (kert[a]==q) kdb[a]+=kdb[y]; } } int ki(int a, int b) { if (a<0 || a>=n || b<0 || b>=m) return k; return pos[a*m+b]; } void upd(int a, int b, int c) { t[0]=ki(a-1, b-1), t[1]=ki(a-1, b), t[2]=ki(a, b-1), t[3]=ki(a, b); sort(t, t+4); ert=c; if (t[0]!=t[1]) st=t[0], fi=t[1]-1, add(1); if (t[2]!=t[3]) st=t[2], fi=t[3]-1, add(1); } void kupd(int a, int b, int c) { upd(a+1, b+1, c), upd(a+1, b, c); upd(a, b+1, c), upd(a, b, c); } int swap_seats(int a, int b) { kupd(sor[a], oszlop[a], -1), kupd(sor[b], oszlop[b], -1); swap(sor[a], sor[b]), swap(oszlop[a], oszlop[b]); pos[sor[a]*m+oszlop[a]]=a, pos[sor[b]*m+oszlop[b]]=b; kupd(sor[a], oszlop[a], 1), kupd(sor[b], oszlop[b], 1); return kdb[1]; } void give_initial_chart(int a, int b, vector<int> c, vector<int> d) { n=a, m=b, k=n*m; for (int i=0; i<k; i++) sor[i]=c[i], oszlop[i]=d[i], pos[sor[i]*m+oszlop[i]]=i; for (int i=p; i<2*p; i++) { int x=i-p; kezd[i]=x, veg[i]=x, kdb[i]=1; if (x<k) kert[i]=0; else kert[i]=p; } for (int i=p-1; i>=0; i--) { int x=2*i, y=2*i+1; kezd[i]=kezd[x], veg[i]=veg[y]; kert[i]=min(kert[x], kert[y]); if (kert[x]==kert[i]) kdb[i]+=kdb[x]; if (kert[y]==kert[i]) kdb[i]+=kdb[y]; } for (int i=0; i<=n; i++) for (int j=0; j<=m; j++) upd(i, j, 1); }
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