Submission #89406

#	Time	Username	Problem	Language	Result	Execution time	Memory
89406		nicksona	Nice sequence (IZhO18_sequence)	C++14	76 / 100	2039 ms	66384 KiB

sequence

#include<bits/stdc++.h>
#define ll long long
#define pb push_back
using namespace std;
int n,m;
int t;
bool OK=true;
int M=0;
vector <int> v[400001];
int mas[400001];
int fix[400001],nmas[1000001];
void go (int u,int col){
	if (!OK) return ;
	fix[u]=col;
	for (int i=0;i<v[u].size();i++){
		int node=v[u][i];
		if (fix[node]==col){
			OK=false;
			return ;
		}
		
		if (!OK) return ;	
		if (fix[node]==0) go(node,col);
	}
}
inline bool check (int sz){
	
	for (int i=0;i<=sz;i++){
		if (i+n<=sz){
			v[i].pb(i+n);
		}
		if (i+m<=sz){
			v[i+m].pb(i);
		}
	}
	
	OK=true;
	for (int i=0;i<=sz;i++){
		if (fix[i]==0){
			go(i,i+1);
		}	
	}
	
	for (int i=0;i<=sz;i++){
		fix[i]=0;
		v[i].clear();
	}
	
	return OK;
}
void top_sort (int u){
	fix[u]=1;
	for (int i=0;i<v[u].size();i++){
		int node=v[u][i];
		if (fix[node]==0) top_sort(node);
	}
	mas[u]=++M;
}
inline void solve (int sz){
	
	for (int i=0;i<=sz;i++){
		if (i+n<=sz){
			v[i].pb(i+n);
		}
		if (i+m<=sz){
			v[i+m].pb(i);
		}
	}
	
	OK=true;
	for (int i=0;i<=sz;i++){
		if (fix[i]==0){
			top_sort(i);
		}	
	}
	
	
	for (int i=0;i<=sz;i++){
		nmas[i]=mas[i]-mas[i-1];
	}
	
	for (int i=0;i<=sz;i++){
		fix[i]=0;
		v[i].clear();
	}
}
main () {
	ios::sync_with_stdio(false);
	cin>>t;
	while (t--){
		cin>>n>>m;
		
		int k=0,ans=0;
		
		ans=m-__gcd(n,m)+n;
		ans--;
		
		M=0;
		if (ans>0) solve(ans);
		cout<<ans<<endl;
		for (int i=1;i<=ans;i++){
			cout<<nmas[i]<<" ";
		}
		cout<<endl;
	}
	return 0;
}
/*
1
2 4
  _   _   _          _
 | \ | | (_)        | |
 |  \| |  _    ___  | | __  ___    ___    _ __     __ _
 | . ` | | |  / __| | |/ / / __|  / _ \  | '_ \   / _` |
 | |\  | | | | (__  |   <  \__ \ | (_) | | | | | | (_| |
 |_| \_| |_|  \___| |_|\_\ |___/  \___/  |_| |_|  \__,_|
 
*/

Compilation message (stderr)

sequence.cpp: In function 'void go(int, int)':
sequence.cpp:15:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0;i<v[u].size();i++){
               ~^~~~~~~~~~~~
sequence.cpp: In function 'void top_sort(int)':
sequence.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0;i<v[u].size();i++){
               ~^~~~~~~~~~~~
sequence.cpp: At global scope:
sequence.cpp:87:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () {
       ^
sequence.cpp: In function 'int main()':
sequence.cpp:93:7: warning: unused variable 'k' [-Wunused-variable]
   int k=0,ans=0;
       ^

• Subtask 1: 6 / 6
• Subtask 2: 9 / 9
• Subtask 3: 14 / 14
• Subtask 4: 15 / 15
• Subtask 5: 14 / 14
• Subtask 6: 18 / 18
• Subtask 7: 0 / 24