oj.uz

Submission #479150

# Submission time Handle Problem Language Result Execution time Memory
479150 2021-10-10T08:06:42 Z errorgorn Newspapers (CEOI21_newspapers) C++17
100 / 100
 99 ms 23876 KB 
//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << ": " << x << endl

#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define lb lower_bound
#define ub upper_bound

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

const int MOD=998244353;

ll qexp(ll b,ll p,int m){
    ll res=1;
    while (p){
        if (p&1) res=(res*b)%m;
        b=(b*b)%m;
        p>>=1;
    }
    return res;
}

ll inv(ll i){
	return qexp(i,MOD-2,MOD);
}

ll fix(ll i){
	i%=MOD;
	if (i<0) i+=MOD;
	return i;
}

ll fac[1000005];
ll ifac[1000005];

ll nCk(int i,int j){
	if (i<j) return 0;
	return fac[i]*ifac[j]%MOD*ifac[i-j]%MOD;
}

int n,m;
vector<int> al[1005];
vector<int> al2[1005];

bool path[1005];
bool vis[1005];

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	fac[0]=1;
	rep(x,1,1000005) fac[x]=fac[x-1]*x%MOD;
	ifac[1000004]=inv(fac[1000004]);
	rep(x,1000005,1) ifac[x-1]=ifac[x]*x%MOD;
	
	cin>>n>>m;
	
	int a,b;
	rep(x,0,m){
		cin>>a>>b;
		a--,b--;
		
		al[a].pub(b);
		al[b].pub(a);
	}
	
	if (n==1){
		cout<<"YES"<<endl;
		cout<<1<<endl;
		cout<<1<<endl;
	}
	else if (n==2){
		cout<<"YES"<<endl;
		cout<<2<<endl;
		cout<<2<<" "<<2<<endl;
	}
	else{
		if (n==m+1){
			rep(x,0,n) if (sz(al[x])!=1) path[x]=true;
			
			rep(x,0,n) for (auto &it:al[x]){
				if (path[x] && path[it]) al2[x].pub(it);
			}
			
			rep(x,0,n) swap(al[x],al2[x]);
			
			rep(x,0,n) if (path[x] && sz(al[x])<=1){
				memset(vis,false,sizeof(vis));
				int curr=x;
				vector<int> ans={x};
				vis[x]=true;
				bool can=true;
				
				if (sz(al[x])) while (true){
					int cnt=0;
					for (auto &it:al[curr]) if (!vis[it]){
						if (sz(al[it])>1) cnt++;
					}
					
					if (cnt>1){
						can=false;
						break;
					}
					if (cnt==0){
						for (auto &it:al[curr]) if (!vis[it]){
							vis[it]=true;
							ans.pub(it);
							ans.pub(curr);
						}
						ans.pob();
						break;
					}
					else{
						for (auto &it:al[curr]) if (!vis[it] && sz(al[it])==1){
							vis[it]=true;
							ans.pub(it);
							ans.pub(curr);
						}
						for (auto &it:al[curr]) if (!vis[it]){
							vis[it]=true;
							ans.pub(it);
							curr=it;
							break;
						}
					}
				}
				
				if (can){
					cout<<"YES"<<endl;
					cout<<sz(ans)*2<<endl;
					for (auto it:ans) cout<<it+1<<" "; 
					reverse(all(ans));
					for (auto it:ans) cout<<it+1<<" "; cout<<endl;
					return 0;
				}
			}
			cout<<"NO"<<endl;
		}
		else{
			cout<<"NO"<<endl;
		}
	}
}

Compilation message

newspapers.cpp: In function 'int main()':
newspapers.cpp:160:6: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  160 |      for (auto it:ans) cout<<it+1<<" "; cout<<endl;
      |      ^~~
newspapers.cpp:160:41: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  160 |      for (auto it:ans) cout<<it+1<<" "; cout<<endl;
      |                                         ^~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 15948 KB Output is correct
2 Correct 17 ms 15944 KB Output is correct
3 Correct 17 ms 15964 KB Output is correct
4 Correct 17 ms 16012 KB Output is correct
5 Correct 17 ms 16020 KB Output is correct
6 Correct 16 ms 15968 KB Output is correct
7 Correct 17 ms 15948 KB Output is correct
8 Correct 17 ms 15972 KB Output is correct
9 Correct 16 ms 15948 KB Output is correct
10 Correct 17 ms 16012 KB Output is correct
11 Correct 17 ms 15940 KB Output is correct
12 Correct 17 ms 16020 KB Output is correct
13 Correct 17 ms 15916 KB Output is correct
14 Correct 16 ms 15932 KB Output is correct
15 Correct 17 ms 16020 KB Output is correct
16 Correct 16 ms 16028 KB Output is correct
17 Correct 17 ms 15948 KB Output is correct
18 Correct 17 ms 16028 KB Output is correct
19 Correct 17 ms 15948 KB Output is correct
20 Correct 17 ms 15948 KB Output is correct
21 Correct 17 ms 15948 KB Output is correct
22 Correct 17 ms 15952 KB Output is correct
23 Correct 19 ms 15948 KB Output is correct
24 Correct 16 ms 15948 KB Output is correct
25 Correct 16 ms 15948 KB Output is correct
26 Correct 16 ms 16024 KB Output is correct
27 Correct 16 ms 15932 KB Output is correct
28 Correct 17 ms 16032 KB Output is correct
29 Correct 17 ms 15904 KB Output is correct
30 Correct 17 ms 15984 KB Output is correct
31 Correct 17 ms 15980 KB Output is correct
32 Correct 20 ms 15940 KB Output is correct
33 Correct 16 ms 15948 KB Output is correct
34 Correct 17 ms 15940 KB Output is correct
35 Correct 17 ms 16020 KB Output is correct
36 Correct 17 ms 16020 KB Output is correct
37 Correct 17 ms 15940 KB Output is correct
38 Correct 16 ms 15980 KB Output is correct
39 Correct 16 ms 15972 KB Output is correct
40 Correct 16 ms 15948 KB Output is correct
41 Correct 16 ms 15916 KB Output is correct
42 Correct 17 ms 16024 KB Output is correct
43 Correct 16 ms 15972 KB Output is correct
44 Correct 17 ms 15948 KB Output is correct
45 Correct 20 ms 15916 KB Output is correct
46 Correct 17 ms 15932 KB Output is correct
47 Correct 17 ms 15948 KB Output is correct
48 Correct 17 ms 15948 KB Output is correct
49 Correct 17 ms 15996 KB Output is correct
50 Correct 17 ms 15948 KB Output is correct
51 Correct 18 ms 15948 KB Output is correct
52 Correct 17 ms 16020 KB Output is correct
53 Correct 19 ms 16048 KB Output is correct
54 Correct 18 ms 15932 KB Output is correct
55 Correct 17 ms 16008 KB Output is correct
56 Correct 18 ms 15948 KB Output is correct
57 Correct 17 ms 16024 KB Output is correct
58 Correct 16 ms 15916 KB Output is correct
59 Correct 17 ms 15936 KB Output is correct
60 Correct 17 ms 15948 KB Output is correct
61 Correct 19 ms 15948 KB Output is correct
62 Correct 16 ms 15936 KB Output is correct
63 Correct 17 ms 15980 KB Output is correct
64 Correct 17 ms 15948 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 15908 KB Output is correct
2 Correct 17 ms 16016 KB Output is correct
3 Correct 17 ms 15948 KB Output is correct
4 Correct 16 ms 15904 KB Output is correct
5 Correct 17 ms 15960 KB Output is correct
6 Correct 17 ms 15948 KB Output is correct
7 Correct 18 ms 15948 KB Output is correct
8 Correct 16 ms 16016 KB Output is correct
9 Correct 16 ms 16024 KB Output is correct
10 Correct 17 ms 15904 KB Output is correct
11 Correct 21 ms 16032 KB Output is correct
12 Correct 17 ms 16000 KB Output is correct
13 Correct 17 ms 16088 KB Output is correct
14 Correct 18 ms 16068 KB Output is correct
15 Correct 17 ms 16024 KB Output is correct
16 Correct 17 ms 16076 KB Output is correct
17 Correct 17 ms 16060 KB Output is correct
18 Correct 18 ms 16060 KB Output is correct
19 Correct 16 ms 16076 KB Output is correct
20 Correct 17 ms 16076 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 15948 KB Output is correct
2 Correct 17 ms 15944 KB Output is correct
3 Correct 17 ms 15964 KB Output is correct
4 Correct 17 ms 16012 KB Output is correct
5 Correct 17 ms 16020 KB Output is correct
6 Correct 16 ms 15968 KB Output is correct
7 Correct 17 ms 15948 KB Output is correct
8 Correct 17 ms 15972 KB Output is correct
9 Correct 16 ms 15948 KB Output is correct
10 Correct 17 ms 16012 KB Output is correct
11 Correct 17 ms 15940 KB Output is correct
12 Correct 17 ms 16020 KB Output is correct
13 Correct 17 ms 15916 KB Output is correct
14 Correct 16 ms 15932 KB Output is correct
15 Correct 17 ms 16020 KB Output is correct
16 Correct 16 ms 16028 KB Output is correct
17 Correct 17 ms 15948 KB Output is correct
18 Correct 17 ms 16028 KB Output is correct
19 Correct 17 ms 15948 KB Output is correct
20 Correct 17 ms 15948 KB Output is correct
21 Correct 17 ms 15948 KB Output is correct
22 Correct 17 ms 15952 KB Output is correct
23 Correct 19 ms 15948 KB Output is correct
24 Correct 16 ms 15948 KB Output is correct
25 Correct 16 ms 15948 KB Output is correct
26 Correct 16 ms 16024 KB Output is correct
27 Correct 16 ms 15932 KB Output is correct
28 Correct 17 ms 16032 KB Output is correct
29 Correct 17 ms 15904 KB Output is correct
30 Correct 17 ms 15984 KB Output is correct
31 Correct 17 ms 15980 KB Output is correct
32 Correct 20 ms 15940 KB Output is correct
33 Correct 16 ms 15948 KB Output is correct
34 Correct 17 ms 15940 KB Output is correct
35 Correct 17 ms 16020 KB Output is correct
36 Correct 17 ms 16020 KB Output is correct
37 Correct 17 ms 15940 KB Output is correct
38 Correct 16 ms 15980 KB Output is correct
39 Correct 16 ms 15972 KB Output is correct
40 Correct 16 ms 15948 KB Output is correct
41 Correct 16 ms 15916 KB Output is correct
42 Correct 17 ms 16024 KB Output is correct
43 Correct 16 ms 15972 KB Output is correct
44 Correct 17 ms 15948 KB Output is correct
45 Correct 20 ms 15916 KB Output is correct
46 Correct 17 ms 15932 KB Output is correct
47 Correct 17 ms 15948 KB Output is correct
48 Correct 17 ms 15948 KB Output is correct
49 Correct 17 ms 15996 KB Output is correct
50 Correct 17 ms 15948 KB Output is correct
51 Correct 18 ms 15948 KB Output is correct
52 Correct 17 ms 16020 KB Output is correct
53 Correct 19 ms 16048 KB Output is correct
54 Correct 18 ms 15932 KB Output is correct
55 Correct 17 ms 16008 KB Output is correct
56 Correct 18 ms 15948 KB Output is correct
57 Correct 17 ms 16024 KB Output is correct
58 Correct 16 ms 15916 KB Output is correct
59 Correct 17 ms 15936 KB Output is correct
60 Correct 17 ms 15948 KB Output is correct
61 Correct 19 ms 15948 KB Output is correct
62 Correct 16 ms 15936 KB Output is correct
63 Correct 17 ms 15980 KB Output is correct
64 Correct 17 ms 15948 KB Output is correct
65 Correct 17 ms 15964 KB Output is correct
66 Correct 18 ms 15948 KB Output is correct
67 Correct 16 ms 15896 KB Output is correct
68 Correct 19 ms 15960 KB Output is correct
69 Correct 16 ms 15912 KB Output is correct
70 Correct 17 ms 15948 KB Output is correct
71 Correct 16 ms 16024 KB Output is correct
72 Correct 16 ms 15948 KB Output is correct
73 Correct 17 ms 15968 KB Output is correct
74 Correct 17 ms 15948 KB Output is correct
75 Correct 17 ms 15988 KB Output is correct
76 Correct 17 ms 16004 KB Output is correct
77 Correct 17 ms 15948 KB Output is correct
78 Correct 16 ms 15948 KB Output is correct
79 Correct 17 ms 15948 KB Output is correct
80 Correct 16 ms 16020 KB Output is correct
81 Correct 17 ms 16028 KB Output is correct
82 Correct 17 ms 16004 KB Output is correct
83 Correct 17 ms 16056 KB Output is correct
84 Correct 18 ms 16032 KB Output is correct
85 Correct 17 ms 15956 KB Output is correct
86 Correct 17 ms 15952 KB Output is correct
87 Correct 17 ms 16076 KB Output is correct
88 Correct 17 ms 16028 KB Output is correct
89 Correct 19 ms 16076 KB Output is correct
90 Correct 17 ms 16076 KB Output is correct
91 Correct 17 ms 16028 KB Output is correct
92 Correct 17 ms 16076 KB Output is correct
93 Correct 16 ms 16076 KB Output is correct
94 Correct 17 ms 16076 KB Output is correct
95 Correct 18 ms 16076 KB Output is correct
96 Correct 17 ms 16028 KB Output is correct
97 Correct 17 ms 16076 KB Output is correct
98 Correct 17 ms 16032 KB Output is correct
99 Correct 16 ms 16096 KB Output is correct
100 Correct 17 ms 16056 KB Output is correct
101 Correct 16 ms 16024 KB Output is correct
102 Correct 17 ms 16076 KB Output is correct
103 Correct 18 ms 16056 KB Output is correct
104 Correct 17 ms 16076 KB Output is correct
105 Correct 18 ms 16016 KB Output is correct
106 Correct 17 ms 16076 KB Output is correct
107 Correct 17 ms 16076 KB Output is correct
108 Correct 17 ms 16076 KB Output is correct
109 Correct 17 ms 16096 KB Output is correct
110 Correct 17 ms 15992 KB Output is correct
111 Correct 18 ms 16056 KB Output is correct
112 Correct 17 ms 16044 KB Output is correct
113 Correct 18 ms 16056 KB Output is correct
114 Correct 20 ms 15968 KB Output is correct
115 Correct 18 ms 16052 KB Output is correct
116 Correct 18 ms 16012 KB Output is correct
117 Correct 19 ms 16076 KB Output is correct
118 Correct 18 ms 16076 KB Output is correct
119 Correct 19 ms 16028 KB Output is correct
120 Correct 19 ms 16024 KB Output is correct
121 Correct 18 ms 16048 KB Output is correct
122 Correct 18 ms 16076 KB Output is correct
123 Correct 19 ms 16076 KB Output is correct
124 Correct 19 ms 16024 KB Output is correct
125 Correct 19 ms 16004 KB Output is correct
126 Correct 19 ms 16060 KB Output is correct
127 Correct 21 ms 15972 KB Output is correct
128 Correct 19 ms 16076 KB Output is correct
129 Correct 17 ms 16076 KB Output is correct
130 Correct 16 ms 16060 KB Output is correct
131 Correct 18 ms 16000 KB Output is correct
132 Correct 17 ms 16024 KB Output is correct
133 Correct 17 ms 16076 KB Output is correct
134 Correct 34 ms 17596 KB Output is correct
135 Correct 31 ms 17552 KB Output is correct
136 Correct 51 ms 21016 KB Output is correct
137 Correct 43 ms 18944 KB Output is correct
138 Correct 62 ms 20296 KB Output is correct
139 Correct 99 ms 23464 KB Output is correct
140 Correct 31 ms 17168 KB Output is correct
141 Correct 22 ms 16392 KB Output is correct
142 Correct 87 ms 23200 KB Output is correct
143 Correct 99 ms 23876 KB Output is correct
144 Correct 20 ms 16080 KB Output is correct
145 Correct 18 ms 16060 KB Output is correct