Submission #410359

#	Time	Username	Problem	Language	Result	Execution time	Memory
410359		600Mihnea	Tropical Garden (IOI11_garden)	C++17	Compilation error	0 ms	0 KiB

garden

#include <bits/stdc++.h>
#include "garden.h"
#include "gardenlib.h"

using namespace std;

const int K = 35;
const int N = 2 * 150000 + 7;
int n, m, city, from[N], to[N], y;
vector<int> g[N];

void add_edge(int a, int b) {
  from[y] = a;
  to[y] = b;
  g[a].push_back(y);
  y++;
}

int nxt[K][N];

void count_routes(int nn, int mm, int pp, int rr[][2], int qq, int gg[]) {
  n = nn;
  m = mm;
  city = pp;
  y = 0;
  for (int i = 0; i < n; i++) {
    g[i].clear();
  }
  for (int i = 0; i < m; i++) {
    add_edge(rr[i][0], rr[i][1]);
    add_edge(rr[i][1], rr[i][0]);
  }
  for (int i = 0; i < y; i++) {
    if ((int) g[b].size() == 1) {
      nxt[0][i] = i ^ 1;
    } else {
      if ((i ^ 1) == g[b][0]) {
        nxt[0][i] = g[b][1];
      } else {
        nxt[0][i] = g[b][0];
      }
    }
  }
  for (int bit = 1; bit < K; bit++) {
    for (int i = 0; i < y; i++) {
      nxt[bit][i] = nxt[bit - 1][nxt[bit - 1][i]];
    }
  }
  for (int qind = 0; qind < qq; qind++) {
    int len = gg[qind], sol = 0;
    for (int a = 0; a < n; a++) {
      int cur = g[a][0];
      for (int bit = 0; (1 << bit) <= len; bit++) {
        if (len & (1 << bit)) {
          cur = nxt[bit][cur];
        }
      }
      if (from[cur] == city) {
        sol++;
      }
    }
    answer(sol);
  }
}

Compilation message (stderr)

garden.cpp: In function 'void count_routes(int, int, int, int (*)[2], int, int*)':
garden.cpp:34:17: error: 'b' was not declared in this scope
   34 |     if ((int) g[b].size() == 1) {
      |                 ^