Submission #642603

#	Time	Username	Problem	Language	Result	Execution time	Memory
642603		danikoynov	Game (APIO22_game)	C++17	Compilation error	0 ms	0 KiB

game

#include<bits/stdc++.h>
#define endl '\n'

using namespace std;
typedef long long ll;

const int maxk = 5010, maxn = 30010;
vector < int > g[maxn], ng[maxn];
int lat[maxn], erl[maxn], K;
int tf = 0;

void init(int n, int k)
{
    K = k;
    for (int i = 0; i < k - 1; i ++)
    {
        g[i].push_back(i + 1);
        ng[i + 1].push_back(i);
    }
    for (int i = 0; i < k; i ++)
        erl[i] = i, lat[i] = i - 1;
        for (int i = k; i < n; i ++)
            erl[i] = k, lat[i] = -1;

}

void update_erl(int v)
{
    if (lat[v] >= erl[v])
        tf = 1;
    for (int u : ng[v])
    {
        if (erl[v] < erl[u])
        {
            erl[u] = erl[v];
            update_erl(u);
        }
    }
}

void update_lat(int u)
{
    if (lat[u] >= erl[u])
        tf = 1;
    int mx = lat[u];
    /*if (u < K)
        mx = max(mx, u);*/
    for (int v : g[u])
    {
        if (lat[v] < mx)
        {
            lat[v] = mx;
            update_lat(v);
        }
    }
}
int add_teleporter(int u, int v)
{
    g[u].push_back(v);
    ng[v].push_back(u);
    if (erl[v] < erl[u])
    {
        erl[u] = erl[v];
        update_erl(u);
    }
    int mx = lat[u];
    if (u < K)
        mx = max(u, mx);
    if (mx > lat[v])
    {
        lat[v] = mx;
        update_lat(v);
    }
    return tf;
}

namespace {

int read_int() {
  int x;
  if (scanf("%d", &x) != 1) {
    fprintf(stderr, "Error while reading input\n");
    exit(1);
  }
  return x;
}

}  // namespace

int main() {
  int N = read_int();
  int M = read_int();
  int K = read_int();
  std::vector<int> u(M), v(M);
  for (int i = 0; i < M; ++i) {
    u[i] = read_int();
    v[i] = read_int();
  }

  init(N, K);
  int i;
  for (i = 0; i < M; ++i) {
    int answer = add_teleporter(u[i], v[i]);
    if (answer != 0 && answer != 1) {
      i = -1;
      break;
    } else if (answer == 1) {
      break;
    }
  }
  printf("%d\n", i);
  return 0;
}
/**
6 6 3
3 4
5 0
4 5
5 3
1 4
1 4
*/

Compilation message (stderr)

game.cpp: In function 'void init(int, int)':
game.cpp:20:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   20 |     for (int i = 0; i < k; i ++)
      |     ^~~
game.cpp:22:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   22 |         for (int i = k; i < n; i ++)
      |         ^~~
/usr/bin/ld: /tmp/ccLdnBuX.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cckDGFQU.o:game.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status