제출 #794461

#제출 시각아이디문제언어결과실행 시간메모리
794461mathematik던전 (IOI21_dungeons)C++17
89 / 100
7146 ms1429544 KiB
#include "dungeons.h" #include <bits/stdc++.h> #define ll long long using namespace std; uint binary[12][400001][25][3];//index, +, max excluded uint safe_add(uint a, uint b) { if (a > a + b) return UINT_MAX; return a + b; } uint safe_sub(uint a, uint b) { if (a >= b) return a - b; return 0; } int N; vector<int> S, P, W, L; void init(int n, vector<int> s, vector<int> p, vector<int> w, vector<int> l) { s.push_back(0); p.push_back(0); w.push_back(n); l.push_back(n); n++; N = n; S = s, P = p, W = w, L = l; for (int range = 0; range < 12; range++) { ll r = 1 << (range + 13); for (int i = 0; i < n; i++) { if (s[i] <= r) { binary[range][i][0][0] = w[i]; binary[range][i][0][1] = s[i]; binary[range][i][0][2] = UINT_MAX; } else { binary[range][i][0][0] = l[i]; binary[range][i][0][1] = p[i]; binary[range][i][0][2] = s[i]; } } for (int i = 1; i < 25; i++) { for (int ind = 0; ind < n; ind++) { int pointer = binary[range][ind][i - 1][0]; binary[range][ind][i][0] = binary[range][pointer][i - 1][0]; binary[range][ind][i][1] = safe_add(binary[range][ind][i - 1][1], binary[range][pointer][i - 1][1]); binary[range][ind][i][2] = min(binary[range][ind][i - 1][2], safe_sub(binary[range][pointer][i - 1][2], binary[range][ind][i - 1][1])); } } } } long long simulate(int x, int z) { ll t = z; while (t < 8192 && x != N - 1) { if (t >= S[x]) { t += S[x]; x = W[x]; } else { t += P[x]; x = L[x]; } } for (int r = 0; r < 12; r++) { for (int s = 24; s >= 0; s--) { while ((binary[r][x][s][2] > t || binary[r][x][s][2] == UINT_MAX) && x != N - 1 && binary[r][x][s][1] != UINT_MAX) { t += binary[r][x][s][1]; x = binary[r][x][s][0]; } } } return t; }
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