Submission #794098

#TimeUsernameProblemLanguageResultExecution timeMemory
794098mathematikDungeons Game (IOI21_dungeons)C++17
Compilation error
0 ms0 KiB
#include "dungeons.h" #include <bits/stdc++.h> #define ll long long using namespace std; uint binary[16][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 < 16; range++) { ll r = 1 << (range + 9); 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 < 512 && x != N - 1) { if (t >= S[x]) { t += S[x]; x = W[x]; } else { t += P[x]; x = L[x]; } } int c = 0; for (int r = 0; r < 16; 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 < 1 << (r + 10) || r = 15)) { t += binary[r][x][s][1]; x = binary[r][x][s][0]; } } } return t; }

Compilation message (stderr)

dungeons.cpp: In function 'long long int simulate(int, int)':
dungeons.cpp:83:144: error: lvalue required as left operand of assignment
   83 |        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 < 1 << (r + 10) || r = 15)) {
      |                                                                                                                              ~~~~~~~~~~~~~~~~~~^~~~
dungeons.cpp:77:7: warning: unused variable 'c' [-Wunused-variable]
   77 |   int c = 0;
      |       ^