oj.uz

Submission #552964

# Submission time Handle Problem Language Result Execution time Memory
552964 2022-04-24T11:20:54 Z ToroTN Newspapers (CEOI21_newspapers) C++14
100 / 100
 85 ms 12080 KB 
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
int n,m,u_i[1000005],v_i[1000005],id[1005],st,lv[1005],mx,ed;
int par[1005],num,hsh[1005],type=0;
vector<int> v[1005],g[1005],line,ans;
stack<int> stk;
void dfs(int u,int p)
{
    for(auto node:g[u])
    {
        if(node!=p)
        {
            lv[node]=lv[u]+1;
            dfs(node,u);
        }
    }
}

void dfs2(int u,int p)
{
    for(auto node:g[u])
    {
        if(node!=p)
        {
            par[node]=u;
            lv[node]=lv[u]+1;
            dfs2(node,u);
        }
    }
}

void dfs3(int u,int p)
{
    ans.pb(u);
    for(auto node:g[u])
    {
        if(p!=node&&hsh[node]==0)
        {
            lv[node]=lv[u]+1;
            if(lv[node]==2)type=-1;
            dfs3(node,u);
            ans.pb(u);
        }
    }
}

int main()
{
    scanf("%d%d",&n,&m);
    for(int i=1;i<=m;i++)
    {
        scanf("%d%d",&u_i[i],&v_i[i]);
        ++id[u_i[i]];
        ++id[v_i[i]];
        v[u_i[i]].pb(v_i[i]);
        v[v_i[i]].pb(u_i[i]);
    }
    if(n==1)
    {
        printf("YES\n1\n1\n");
        return 0;
    }
    if(n==2)
    {
        printf("YES\n2\n1 1\n");
        return 0;
    }
    if(m>n-1)
    {
        printf("NO\n");
        return 0;
    }
    for(int i=1;i<=m;i++)
    {
        if(id[u_i[i]]>1&&id[v_i[i]]>1)
        {
            g[u_i[i]].pb(v_i[i]);
            g[v_i[i]].pb(u_i[i]);
        }
    }
    for(int i=1;i<=n;i++)
    {
        if(id[i]>1)
        {
            lv[i]=1;
            dfs(i,i);
            mx=-1;
            for(int j=1;j<=n;j++)
            {
                if(lv[j]>mx)
                {
                    st=j;
                    mx=lv[j];
                }
            }
            lv[st]=1;
            dfs2(st,st);
            mx=-1;
            for(int j=1;j<=n;j++)
            {
                if(lv[j]>mx)
                {
                    mx=lv[j];
                    ed=j;
                }
            }
            break;
        }
    }
    num=ed;
    while(1)
    {
        stk.push(num);
        ++hsh[num];
        if(num==st)break;
        num=par[num];
    }
    while(!stk.empty())
    {
        line.push_back(stk.top());
        stk.pop();
    }
    memset(lv,0,sizeof lv);
    for(int i=0;i<line.size();i++)
    {
        dfs3(line[i],line[i]);

    }
    if(type==-1)
    {
        printf("NO\n");
    }else
    {

        printf("YES\n");
        printf("%d\n",2*ans.size());
        for(int i=0;i<ans.size();i++)
        {
            printf("%d ",ans[i]);
        }
        for(int i=ans.size()-1;i>=0;i--)
        {
            printf("%d ",ans[i]);
        }
        printf("\n");
    }
}

Compilation message

newspapers.cpp: In function 'int main()':
newspapers.cpp:125:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  125 |     for(int i=0;i<line.size();i++)
      |                 ~^~~~~~~~~~~~
newspapers.cpp:137:18: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
  137 |         printf("%d\n",2*ans.size());
      |                 ~^    ~~~~~~~~~~~~
      |                  |     |
      |                  int   std::vector<int>::size_type {aka long unsigned int}
      |                 %ld
newspapers.cpp:138:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  138 |         for(int i=0;i<ans.size();i++)
      |                     ~^~~~~~~~~~~
newspapers.cpp:50:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
newspapers.cpp:53:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         scanf("%d%d",&u_i[i],&v_i[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 356 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 352 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 356 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 352 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 1 ms 360 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 356 KB Output is correct
36 Correct 1 ms 352 KB Output is correct
37 Correct 1 ms 296 KB Output is correct
38 Correct 1 ms 356 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 0 ms 340 KB Output is correct
42 Correct 0 ms 356 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 0 ms 340 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 0 ms 468 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 0 ms 340 KB Output is correct
50 Correct 0 ms 340 KB Output is correct
51 Correct 0 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 1 ms 340 KB Output is correct
55 Correct 1 ms 340 KB Output is correct
56 Correct 1 ms 340 KB Output is correct
57 Correct 1 ms 340 KB Output is correct
58 Correct 0 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 1 ms 340 KB Output is correct
62 Correct 0 ms 340 KB Output is correct
63 Correct 1 ms 340 KB Output is correct
64 Correct 1 ms 356 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 356 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 352 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 356 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 352 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 0 ms 340 KB Output is correct
25 Correct 1 ms 360 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 356 KB Output is correct
36 Correct 1 ms 352 KB Output is correct
37 Correct 1 ms 296 KB Output is correct
38 Correct 1 ms 356 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 0 ms 340 KB Output is correct
42 Correct 0 ms 356 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 0 ms 340 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 0 ms 468 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 0 ms 340 KB Output is correct
50 Correct 0 ms 340 KB Output is correct
51 Correct 0 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 1 ms 340 KB Output is correct
55 Correct 1 ms 340 KB Output is correct
56 Correct 1 ms 340 KB Output is correct
57 Correct 1 ms 340 KB Output is correct
58 Correct 0 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 1 ms 340 KB Output is correct
62 Correct 0 ms 340 KB Output is correct
63 Correct 1 ms 340 KB Output is correct
64 Correct 1 ms 356 KB Output is correct
65 Correct 0 ms 352 KB Output is correct
66 Correct 1 ms 340 KB Output is correct
67 Correct 1 ms 340 KB Output is correct
68 Correct 1 ms 340 KB Output is correct
69 Correct 1 ms 340 KB Output is correct
70 Correct 1 ms 340 KB Output is correct
71 Correct 1 ms 340 KB Output is correct
72 Correct 1 ms 340 KB Output is correct
73 Correct 1 ms 352 KB Output is correct
74 Correct 1 ms 356 KB Output is correct
75 Correct 1 ms 340 KB Output is correct
76 Correct 1 ms 340 KB Output is correct
77 Correct 0 ms 340 KB Output is correct
78 Correct 1 ms 360 KB Output is correct
79 Correct 1 ms 360 KB Output is correct
80 Correct 1 ms 376 KB Output is correct
81 Correct 1 ms 340 KB Output is correct
82 Correct 1 ms 384 KB Output is correct
83 Correct 1 ms 340 KB Output is correct
84 Correct 1 ms 340 KB Output is correct
85 Correct 4 ms 356 KB Output is correct
86 Correct 1 ms 360 KB Output is correct
87 Correct 1 ms 340 KB Output is correct
88 Correct 1 ms 340 KB Output is correct
89 Correct 2 ms 488 KB Output is correct
90 Correct 1 ms 360 KB Output is correct
91 Correct 1 ms 356 KB Output is correct
92 Correct 1 ms 340 KB Output is correct
93 Correct 2 ms 488 KB Output is correct
94 Correct 1 ms 356 KB Output is correct
95 Correct 1 ms 468 KB Output is correct
96 Correct 1 ms 468 KB Output is correct
97 Correct 1 ms 340 KB Output is correct
98 Correct 1 ms 488 KB Output is correct
99 Correct 1 ms 468 KB Output is correct
100 Correct 1 ms 468 KB Output is correct
101 Correct 1 ms 468 KB Output is correct
102 Correct 1 ms 468 KB Output is correct
103 Correct 1 ms 468 KB Output is correct
104 Correct 1 ms 468 KB Output is correct
105 Correct 1 ms 468 KB Output is correct
106 Correct 1 ms 468 KB Output is correct
107 Correct 1 ms 468 KB Output is correct
108 Correct 2 ms 496 KB Output is correct
109 Correct 1 ms 468 KB Output is correct
110 Correct 1 ms 356 KB Output is correct
111 Correct 1 ms 360 KB Output is correct
112 Correct 1 ms 468 KB Output is correct
113 Correct 1 ms 492 KB Output is correct
114 Correct 1 ms 468 KB Output is correct
115 Correct 1 ms 468 KB Output is correct
116 Correct 1 ms 468 KB Output is correct
117 Correct 1 ms 468 KB Output is correct
118 Correct 1 ms 468 KB Output is correct
119 Correct 1 ms 356 KB Output is correct
120 Correct 1 ms 468 KB Output is correct
121 Correct 1 ms 468 KB Output is correct
122 Correct 1 ms 468 KB Output is correct
123 Correct 1 ms 468 KB Output is correct
124 Correct 1 ms 468 KB Output is correct
125 Correct 1 ms 468 KB Output is correct
126 Correct 1 ms 468 KB Output is correct
127 Correct 1 ms 468 KB Output is correct
128 Correct 1 ms 488 KB Output is correct
129 Correct 1 ms 340 KB Output is correct
130 Correct 1 ms 364 KB Output is correct
131 Correct 1 ms 340 KB Output is correct
132 Correct 1 ms 360 KB Output is correct
133 Correct 1 ms 468 KB Output is correct
134 Correct 17 ms 2764 KB Output is correct
135 Correct 16 ms 2596 KB Output is correct
136 Correct 44 ms 7116 KB Output is correct
137 Correct 26 ms 4452 KB Output is correct
138 Correct 44 ms 6604 KB Output is correct
139 Correct 85 ms 11392 KB Output is correct
140 Correct 12 ms 1952 KB Output is correct
141 Correct 4 ms 852 KB Output is correct
142 Correct 76 ms 10676 KB Output is correct
143 Correct 85 ms 12080 KB Output is correct
144 Correct 1 ms 468 KB Output is correct
145 Correct 1 ms 468 KB Output is correct