#include "gardenlib.h"
#include "garden.h"
#include <bits/stdc++.h>
//#include "grader.cpp"
#define fr first
#define sc second
#define mk make_pair
#define pb emplace_back
#define all(s) s.begin(), s.end()
#define int long long
using namespace std;
const int SZ = 200005;
int n, m, p, q, k[SZ], edges[SZ][2], used[SZ][2], mn[SZ][2], last, go[2], lst, dp[SZ][2][2];
void dfs (int v, int type)
{
used[v][type] = 1;
int to_type;
if (type == 0 || mn[v][1] == -1)
{
to_type = (mn[ mn[v][0] ][0] == v ? 1 : 0);
if (mn[v][0] == p)
{
if ( to_type == 1 )
dp[v][type][1] = 1,
dp[v][type][0] = dp[p][1][0] + 1;
else
dp[v][type][0] = 1,
dp[v][type][1] = dp[p][0][1] + 1;
return;
}
if ( to_type == 1 && used[ mn[v][0] ][1] == 0 )
dfs( mn[v][0], 1);
else if ( used[ mn[v][0] ][0] == 0 )
dfs( mn[v][0], 0);
dp[v][type][0] = dp[ mn[v][0] ][to_type][0] + 1,
dp[v][type][1] = dp[ mn[v][0] ][to_type][1] + 1;
}
else
{
to_type = (mn[ mn[v][1] ][0] == v ? 1 : 0);
if (mn[v][1] == p)
{
if ( to_type == 1 )
dp[v][type][1] = 1,
dp[v][type][0] = dp[p][1][0] + 1;
else
dp[v][type][0] = 1,
dp[v][type][1] = dp[p][0][1] + 1;
return;
}
if ( to_type == 1 && used[ mn[v][1] ][1] == 0 )
dfs( mn[v][1], 1);
else if ( used[ mn[v][1] ][0] == 0 )
dfs( mn[v][1], 0);
dp[v][type][0] = dp[ mn[v][1] ][to_type][0] + 1,
dp[v][type][1] = dp[ mn[v][1] ][to_type][1] + 1;
}
}
void count_routes(int N, int M, int P, int R[][2], int Q, int G[])
{
memset(mn, -1, sizeof(mn) );
n = N, m = M, p = P;
for (int i = 0; i < n; i++)
for (int j = 0; j < 2; j++)
for (int k = 0; k < 2; k++)
dp[i][j][k] = 1e9 + 1e8;
for (int i = 0; i < m; i++)
{
edges[i][0] = R[i][0], edges[i][1] = R[i][1];
if ( mn[ edges[i][0] ][0] == -1 ) mn[ edges[i][0] ][0] = edges[i][1];
else if ( mn[ edges[i][0] ][1] == -1 ) mn[ edges[i][0] ][1] = edges[i][1];
if ( mn[ edges[i][1] ][0] == -1 ) mn[ edges[i][1] ][0] = edges[i][0];
else if ( mn[ edges[i][1] ][1] == -1 ) mn[ edges[i][1] ][1] = edges[i][0];
}
q = Q;
for (int i = 0; i < q; i++)
k[i] = G[i];
dfs(p, 0);
dfs(p, 1);
for (int i = 0; i < n; i++)
if (!used[i][0]) dfs(i, 0);
if ( dp[p][0][0] < dp[p][0][1] ) go[0] = 0;
else go[0] = 1;
if ( dp[p][1][0] < dp[p][1][1] ) go[1] = 0;
else go[1] = 1;
for (int i = 0; i < q; i++)
{
int ans = 0, sup;
for (int j = 0; j < n; j++)
{
if ( min( dp[j][0][0], dp[j][0][1] ) > k[i] ) continue;
if ( dp[j][0][0] < dp[j][0][1] )
{
sup = k[i] - dp[j][0][0];
if (sup == 0) {
ans++;
continue;
}
if (go[0] == 0 && sup % dp[p][0][0] == 0)
ans++;
else if (go[0] == 1 && (sup % (dp[p][0][1] + dp[p][1][0]) == 0
|| sup % (dp[p][0][1] + dp[p][1][0]) == dp[p][0][1] || sup % (dp[p][0][1] + dp[p][1][0]) == dp[p][1][0]) )
ans++;
}
else
{
sup = k[i] - dp[j][0][1];
if (sup == 0){
ans++;
continue;
}
if (go[1] == 1 && sup % dp[p][1][1] == 0)
ans++;
else if (go[1] == 0 && (sup % (dp[p][1][0] + dp[p][0][1]) == 0
|| sup % (dp[p][1][0] + dp[p][0][1]) == dp[p][1][0] || sup % (dp[p][1][0] + dp[p][0][1]) == dp[p][0][1]) )
ans++;
}
}
answer(ans);
}
}
Compilation message
/tmp/cc85ol0d.o: In function `main':
grader.cpp:(.text.startup+0x38): undefined reference to `count_routes(int, int, int, int (*) [2], int, int*)'
collect2: error: ld returned 1 exit status
