Submission #1146406

#	Time	Username	Problem	Language	Result	Execution time	Memory
1146406		ReLice	Permutation Recovery (info1cup17_permutation)	C++20	0 / 100	2 ms	5388 KiB

Main

#include <bits/stdc++.h>
#define ll long long
#define ld double
#define pb push_back
#define pf push_front
#define ins insert
#define fr first
#define sc second
#define endl "\n"
#define all(x) x.begin(), x.end()

using namespace std;
void fre(string& name){freopen((name + ".in").c_str(), "r", stdin);freopen((name + ".out").c_str(), "w", stdout);}
void start(){ios_base::sync_with_stdio(NULL);cin.tie(nullptr);cout.tie(nullptr);}

const ll N = 2e5 + 5;
const ll inf = 1e9;
const ll mod = 1e9 + 7;

vector<vector<ll>> g(N);
ll ans[N];
ll vis[N];
vector<ll> tour;

void dfs(ll v){
	for(auto i : g[v]){
		if(vis[i]) continue;
		
		dfs(i);
	}
	vis[v] = 1;
	tour.pb(v);
}

void solve() {
    ll i, j;
    
    ll n;
    cin>>n;
    
    ll q[n + 1];
    ll a[n + 1];
    q[0] = 0;
    
    vector<ll> mn, mx;
    
    for(i=1;i<=n;i++) {
		cin>>q[i];
		a[i] = q[i] - q[i - 1];
		
		if(i > 1){
			if(a[i] > a[i - 1]) g[i - 1].pb(i);
			else g[i].pb(i - 1);
		} 
		
		if(a[i] == 1){
			mn.pb(i);
			for(j=i - 1;j>0;j--){
				if(j < i - 1) g[i].pb(j);
				//cout<<i<<' '<<j<<endl;
				if(a[j] == 1) break;
			}
		}
		else if(a[i] == q[i - 1] + 1){
			mx.pb(a[i]);
			for(j=i - 1;j>0;j--){
				if(j < i - 1) g[j].pb(i);
				//cout<<j<<' '<<i<<endl;
				if(a[j] == q[j - 1] + 1) break;
			}
		}
	}
	
	for(i=mn.back() + 2;i<=n;i++){
		g[mn.back()].pb(i);
	}
	
	for(i=mx.back() + 2;i<=n;i++){
		g[i].pb(mx.back());
	}
	
	dfs(mn.back());
	
	reverse(all(tour));
		
	for(i=0;i<n;i++){
		ans[tour[i]] = i + 1;
	}
	
	for(i=1;i<=n;i++) cout<<ans[i]<<' ';
	cout<<endl;
}

signed main(){
    start();

    ll t = 1;
    //cin>>t;

    while(t--) solve();
}
/*



*/

Compilation message (stderr)

Main.cpp: In function 'void fre(std::string&)':
Main.cpp:13:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | void fre(string& name){freopen((name + ".in").c_str(), "r", stdin);freopen((name + ".out").c_str(), "w", stdout);}
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:13:75: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | void fre(string& name){freopen((name + ".in").c_str(), "r", stdin);freopen((name + ".out").c_str(), "w", stdout);}
      |                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100