# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
436386 | HediChehaidar | Fun Tour (APIO20_fun) | C++17 | 16 ms | 1368 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/*
ID: hedichehaidar
TASK: photo
LANG: C++11
*/
#include<bits/stdc++.h>
#include "fun.h"
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd pair<double,double>
#define vdd vector<pdd>
#define dte tuple<double , double , double>
using namespace std;
const int INF = 1000*1000*1000; // 1 e 9
const int MOD = INF + 7;
const double EPS = 0.000000001; // 1 e -9
const ll inf = (ll)1e18;
bool vis[505];
int dist[505][505];
int n;
/*int hoursRequired(int i , int j){
cout << i << " " << j << endl;
int x; cin>>x;
return x;
}*/
vi nodes[33][2];
int d[(int)1e5 + 10];
bool seen[(int)1e5 + 10];
vi createFunTour(int N , int Q){
n = N;
if(n > 500){
vi ans;
// for(int i = 1 ; i < n ; i++) d[i] = hoursRequired(0 , i);
nodes[0][0].pb(0);
nodes[0][1].pb(0);
for(int i = 1 ; i < n ;i++){
ll cur = 0;
for(int j = 0 ; j < 30 ; j++){
if(i < 2 * cur + 1){
ll l = cur , r = cur + (1 << j) - 1;
// cout <<i << " " << l << " " << r << endl;
if(i > (l+r) / 2){
nodes[j][1].pb(i);
}
else nodes[j][0].pb(i);
break;
}
cur = 2 * cur + 1;
}
}
// cout << nodes[0][0][0] << " " << nodes[0][1][0] << "\n";
// cout << nodes[1][0][0] << " " << nodes[1][0][1] << "\n";
int cur = 0 , side = 0 , curl , curr;
for(int i = 0 ; i < 30 ; i++){
if(nodes[i][0].empty()){
cur = i - 1;side = 1;
curl = i - 1; curr = i - 1;
break;
}
if(nodes[i][1].empty()) {
cur = i; side = 0;
curl = i;
curr = i - 1;
break;
}
}
// cout << curl << " " << curr << endl;
while(ans.size() < n){
ans.pb(nodes[curr][1].back());
// cout << nodes[curr][1].back() << endl;
seen[nodes[curr][1].back()] = true;
nodes[curr][1].pop_back();
ans.pb(nodes[curl][0].back());
// cout << nodes[curl][0].back() << endl;
seen[nodes[curl][0].back()] = true;
nodes[curl][0].pop_back();
if(nodes[curl][0].empty()) curl--;
if(nodes[curr][1].empty()) curr--;
// cout << curr << " " << curl << endl;
if(curr < 0) break;
if(curr == 0){
ans.pb(0);
while(curl > 0){
for(auto c : nodes[curl][0]) ans.pb(c);
curl--;
}
// swap(ans[ans.size() - 1] , ans[ans.size() - 2] );
}
}
return ans;
}
else{
for(int i = 0 ; i < n ; i++){
for(int j = i + 1 ; j < n ; j++){
dist[i][j] = dist[j][i] = hoursRequired(i , j);
}
}
int mx = 1;
for(int i = 2 ; i < n ; i++){
if(dist[0][i] > dist[0][mx]) mx = i;
}
int cur = 0;
for(int i = 0 ; i < n ; i++){
if(dist[mx][i] > dist[mx][cur]) cur = i;
}
vis[cur] = true;
vi res;
res.pb(cur);
int nb = 1;
while(nb < n){
int nxt = cur;
// cout << cur << endl;
for(int i = 0 ; i < n ; i++){
// cout << vis[i] << " " << dist[cur][i] << "\n";
if(dist[cur][i] > dist[cur][nxt] && !vis[i]) {
nxt = i;
}
}
vis[nxt] = true;
res.pb(nxt);
cur = nxt;
nb++;
}
return res;
}
}
/*int main() {
//ifstream fin ("race.in");
//ofstream fout ("race.out");
ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
int N; cin>>N;
for(auto c : createFunTour(N , 400*1000)) cout << c << " " ;
return 0;
}*/
/*
Think of : BS / DFS / BFS / SSSP / SCC / MSP / MAX FLOW / TOPSORT / LCA / MATRIX / DP(bitmask) / 2 POINTERS / SEG TREE / MATH / UN FIND / MO
Read the statement CAREFULLY !!
Make a GREADY APPROACH !!!! (start from highest / lowest)
Make your own TESTS !!
Be careful from CORNER CASES !
*/
Compilation message (stderr)
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
Fetching results... |