#include <bits/stdc++.h>
#include "speedrun.h"
#define fileopen(a, b) freopen(((std::string)a + ".inp").c_str(), "r", stdin); freopen(((std::string)b + ".out").c_str(), "w", stdout);
#define fileopen1(a) freopen(((std::string)a + ".inp").c_str(), "r", stdin); freopen(((std::string)a + ".out").c_str(), "w", stdout);
using namespace std;
const int MAXN = 1005;
vector<int> path[MAXN];
vector<int> order;
int parent[MAXN];
// void assignHints(int subtask, int N, int A[], int B[]);
// void speedrun(int subtask, int N, int start);
// void setHintLen(int l);
// void setHint(int i, int j, bool b);
// int getLength();
// bool getHint(int j);
// bool goTo(int x);
void dfs(int u, int pre = 0) {
// cout << u << endl;
order.push_back(u);
parent[u] = pre;
for (int v: path[u])
if (v != pre) dfs(v, u);
}
void assignHints(int sub, int n, int A[], int B[]) {
for (int i = 1; i < n; i++) {
int u = A[i], v = B[i];
path[u].push_back(v);
path[v].push_back(u);
}
dfs(1);
setHintLen(20);
for (int i = n - 1; i >= 0; i--) {
int u = order[i], v = (i + 1 >= n ? 0 : order[i + 1]);
for (int j = 1; j <= 10; j++)
setHint(u, j, (v >> (j - 1) & 1));
for (int j = 11; j <= 20; j++)
setHint(u, j, (parent[u] >> (j - 11) & 1));
}
}
int nxt[MAXN], par[MAXN];
bool passed[MAXN];
int cnt = 0;
int tot;
void solve(int u, int go) {
// cout << u << ' ' << go << endl;
assert(u && u <= n);
if (!passed[u]) {
passed[u] = 1;
cnt++;
for (int j = 0; j < 10; j++)
nxt[u] |= (getHint(j + 1) << j);
for (int j = 0; j < 10; j++)
par[u] |= (getHint(j + 11) << j);
if (!passed[nxt[u]]) go = nxt[u];
}
if (cnt == tot) return;
if (!go || !goTo(go)) goTo(par[u]), solve(par[u], go);
else solve(go, 0);
}
void speedrun(int sub, int n, int start) {
tot = n;
solve(start, 0);
}
Compilation message
In file included from /usr/include/c++/10/cassert:44,
from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
from speedrun.cpp:1:
speedrun.cpp: In function 'void solve(int, int)':
speedrun.cpp:59:22: error: 'n' was not declared in this scope
59 | assert(u && u <= n);
| ^
