/*
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
*/
#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
using namespace std;
typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int>vi;
typedef vector<vector<int>>vvi;
typedef vector<ll>vl;
typedef vector<vl> vvl;
typedef pair<int,int>pi;
typedef pair<ll,ll> pl;
typedef vector<pl> vpl;
typedef vector<ld> vld;
typedef pair<ld,ld> pld;
typedef vector<pi> vpi;
//typedef tree<ll, null_type, less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
template<typename T> ostream& operator<<(ostream& os, vector<T>& a){os<<"[";for(int i=0; i<ll(a.size()); i++){os << a[i] << ((i!=ll(a.size()-1)?" ":""));}os << "]\n"; return os;}
#define all(x) x.begin(),x.end()
#define YES out("YES")
#define NO out("NO")
#define out(x){cout << x << "\n"; return;}
#define outfl(x){cout << x << endl;return;}
#define GLHF ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define print(x){for(auto ait:x) cout << ait << " "; cout << "\n";}
#define pb push_back
#define umap unordered_map
template<typename T1, typename T2> istream& operator>>(istream& is, pair<T1, T2>& p){is >> p.first >> p.second;return is;}
template<typename T1, typename T2> ostream& operator<<(ostream& os, pair<T1, T2>& p){os <<"" << p.first << " " << p.second << ""; return os;}
void usaco(string taskname){
string fin = taskname + ".in";
string fout = taskname + ".out";
const char* FIN = fin.c_str();
const char* FOUT = fout.c_str();
freopen(FIN, "r", stdin);
freopen(FOUT, "w", stdout);
}
template<typename T>
void read(vector<T>& v){
int n=v.size();
for(int i=0; i<n; i++)
cin >> v[i];
}
template<typename T>
vector<T>UNQ(vector<T>a){
vector<T>ans;
for(T t:a)
if(ans.empty() || t!=ans.back())
ans.push_back(t);
return ans;
}
#include "speedrun.h"
vvi g;
vi ord;
void set1(int i,int x){
for(int j=0; j<10; j++)
if(x&(1<<j))
setHint(i,j+1,1);
}
void set2(int i,int x){
for(int j=0; j<10; j++)
if(x&(1<<j))
setHint(i,j+10+1,1);
}
void dfsp(int src,int par){
if(par!=-1)
set2(src,par);
ord.pb(src);
for(int nbr:g[src])
if(nbr!=par)
dfsp(nbr,src);
}
void assignHints(int subtask, int n, int A[], int B[]) {
g.resize(n+1);
for(int i=1; i<n; i++){
g[A[i]].pb(B[i]);
g[B[i]].pb(A[i]);
}
setHintLen(21);
dfsp(1,-1);
set2(1,ord.back());
for(int i=0; i<n; i++){
set1(ord[i],ord[(i+1)%ord.size()]);
}
for(int i=2; i<=n; i++)
setHint(i,21,g[i].size()==1);
}
int get(int ix){
int ans=0;
for(int i=0; i<10; i++)
if(getHint(1+i+10*ix))
ans+=(1<<i);
return ans;
}
stack<int>nxt;
vector<bool>vis;
void dfs(int src,int par){
int cnxt=get(0),cprv=get(1);
vis[src]=1;
if(getHint(21) && !vis[cnxt])
nxt.push(cnxt);
while(1){
bool ok=0;
while(nxt.size() && !vis[nxt.top()] && goTo(nxt.top())){
int t=nxt.top();
nxt.pop();
dfs(t,src);
ok=1;
}
if(!vis[cnxt] && goTo(cnxt)) {
dfs(cnxt, src);
if(!nxt.size())
break;
cnxt=nxt.top();
ok=1;
}
if(!ok)break;
}
if(!vis[cprv] && goTo(cprv))
dfs(cprv,src);
if(par!=-1)
goTo(par);
}
void speedrun(int subtask, int N, int start) {
vis.resize(N+1);
dfs(start,-1);
bool ok=1;
}
/*
5
1 2
1 3
3 4
3 5
5
1 2
1 3
1 4
1 5
7
1 2
1 3
2 4
2 5
3 6
3 7
18
1 2
1 3
2 4
2 5
3 6
3 7
5 8
6 9
6 10
1 11
3 12
12 13
8 14
14 15
15 16
16 17
1 18
*/
Compilation message
speedrun.cpp: In function 'void speedrun(int, int, int)':
speedrun.cpp:151:10: warning: unused variable 'ok' [-Wunused-variable]
151 | bool ok=1;
| ^~
speedrun.cpp: In function 'void usaco(std::string)':
speedrun.cpp:47:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
47 | freopen(FIN, "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~
speedrun.cpp:48:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
48 | freopen(FOUT, "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
98 ms |
732 KB |
Output is correct |
| 2 |
Correct |
145 ms |
856 KB |
Output is correct |
| 3 |
Incorrect |
138 ms |
684 KB |
Used too many wrong interactions |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
328 KB |
The length is too large |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
328 KB |
The length is too large |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
108 ms |
736 KB |
Output is correct |
| 2 |
Correct |
144 ms |
852 KB |
Output is correct |
| 3 |
Correct |
125 ms |
724 KB |
Output is correct |
| 4 |
Correct |
125 ms |
740 KB |
Output is correct |
| 5 |
Correct |
148 ms |
736 KB |
Output is correct |
| 6 |
Correct |
82 ms |
876 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
90 ms |
728 KB |
Used too many wrong interactions |
| 2 |
Halted |
0 ms |
0 KB |
- |
