Submission #423086

#TimeUsernameProblemLanguageResultExecution timeMemory
423086ocarimaHoliday (IOI14_holiday)C++14
0 / 100
5060 ms6924 KiB
#include"holiday.h" #include<bits/stdc++.h> using namespace std; #define debugsl(x) cout << #x << " = " << x << ", " #define debug(x) debugsl(x) << "\n" #define lli long long #define rep(i, a, b) for(lli i = (a); i <= (b); ++i) #define MAX_N 100003 #define atracciones first #define pos second #define activas first #define suma second int lugar[MAX_N], offset, tmp; vector<pair<int, int> > sortedatt; pair<lli, lli> st[1 << 18]; lli optr[MAX_N * 2], optl[MAX_N * 2], maxr[MAX_N * 2], maxl[MAX_N * 2], res; lli queryst(int nodo, int k){ if (!k) return 0; if (st[nodo].activas <= k) return st[nodo].suma; if (st[nodo * 2].activas > k) return queryst(nodo * 2, k); else return st[nodo * 2].suma + queryst(nodo * 2 + 1, k - st[nodo * 2].activas); } void updatest(int p){ st[offset + p].activas = 1; st[offset + p].suma = sortedatt[p].atracciones; p += offset; while (p > 0){ p >>= 1; st[p].activas = st[p * 2].activas + st[p * 2 + 1].activas; st[p].suma = st[p * 2].suma + st[p * 2 + 1].suma; } } void initst(){ rep(i, 0, offset * 2 - 1) st[i] = {0,0}; } long long int findMaxAttraction(int n, int start, int d, int attraction[]) { rep(i, 0, n - 1) sortedatt.emplace_back(attraction[i], i); sort(sortedatt.begin(), sortedatt.end()); reverse(sortedatt.begin(), sortedatt.end()); rep(i, 0, n - 1) lugar[sortedatt[i].pos] = i; // INICIALIZA EL SEGMENT TREE offset = 1; while (offset < n) offset <<= 1; initst(); rep(ciudad, 0, n - start + 1){ updatest(lugar[start + ciudad]); rep(att, 1, min(ciudad + 1, (lli)d)){ tmp = queryst(1, att); if (tmp > optr[ciudad + att]){ optr[ciudad + att] = tmp; maxr[ciudad + att] = ciudad; } } } return optr[d]; }
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