oj.uz

Submission #926178

# Submission time Handle Problem Language Result Execution time Memory
926178 2024-02-12T16:41:25 Z GrindMachine Newspapers (CEOI21_newspapers) C++17
50 / 100
 51 ms 8796 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "YES" << endl
#define no cout << "NO" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e3 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<ll> adj[N];
vector<ll> mx_depth(N);
bool ok = true;

void dfs1(ll u, ll p){
    mx_depth[u] = 0;

    trav(v,adj[u]){
        if(v == p) conts;
        dfs1(v,u);
        amax(mx_depth[u],mx_depth[v]+1);
    }

    ll cnt = 0;

    trav(v,adj[u]){
        if(v == p) conts;
        cnt += mx_depth[v] >= 2;
    }

    if(cnt > 1){
        ok = false;
    }
}

void solve(int test_case)
{
    ll n,m; cin >> n >> m;
    rep1(i,m){
        ll u,v; cin >> u >> v;
        adj[u].pb(v), adj[v].pb(u);
    }

    if(m != n-1){
        no;
        return;
    }

    if(n == 1){
        yes;
        cout << 1 << endl << 1 << endl;
        return;
    }

    rep1(i,n){
        ok = true;
        dfs1(i,-1);
        
        if(ok){
            yes;
            cout << 1 << endl << 1 << endl;
            return;
        }
    }

    no;

    // yes;
    // vector<ll> ans;
    // for(int i = 2; i <= n; ++i){
    //     ans.pb(i);
    // }
    // if(!((n-1)&1)){
    //     ans.pb(1);
    // }
    // for(int i = 2; i <= n; ++i){
    //     ans.pb(i);
    // }

    // cout << sz(ans) << endl;
    // trav(x,ans) cout << x << " ";
    // cout << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
6.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
3 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
4 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
5 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
6 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
7 Correct 1 ms 348 KB Output is correct
8 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
9 Correct 0 ms 348 KB Output is correct
10 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
11 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
12 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
13 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
14 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
15 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
16 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
17 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
18 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
19 Partially correct 0 ms 396 KB Failed to provide a successful strategy.
20 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
21 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
22 Partially correct 0 ms 356 KB Failed to provide a successful strategy.
23 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
24 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
25 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
26 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
27 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
28 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
29 Correct 0 ms 344 KB Output is correct
30 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
31 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
32 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
33 Partially correct 0 ms 500 KB Failed to provide a successful strategy.
34 Correct 0 ms 348 KB Output is correct
35 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
36 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
37 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
38 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
39 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
40 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
41 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
42 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
43 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
44 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 1 ms 596 KB Output is correct
48 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Partially correct 0 ms 600 KB Failed to provide a successful strategy.
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 344 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 1 ms 600 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 1 ms 348 KB Output is correct
63 Correct 0 ms 344 KB Output is correct
64 Correct 0 ms 348 KB Output is correct

Subtask #2
4.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
3 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
4 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
5 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
6 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
7 Partially correct 0 ms 600 KB Failed to provide a successful strategy.
8 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
9 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
10 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
11 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
12 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
13 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
14 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
15 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
16 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
17 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
18 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
19 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
20 Partially correct 1 ms 348 KB Failed to provide a successful strategy.

Subtask #3
40.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
3 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
4 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
5 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
6 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
7 Correct 1 ms 348 KB Output is correct
8 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
9 Correct 0 ms 348 KB Output is correct
10 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
11 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
12 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
13 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
14 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
15 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
16 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
17 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
18 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
19 Partially correct 0 ms 396 KB Failed to provide a successful strategy.
20 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
21 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
22 Partially correct 0 ms 356 KB Failed to provide a successful strategy.
23 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
24 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
25 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
26 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
27 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
28 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
29 Correct 0 ms 344 KB Output is correct
30 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
31 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
32 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
33 Partially correct 0 ms 500 KB Failed to provide a successful strategy.
34 Correct 0 ms 348 KB Output is correct
35 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
36 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
37 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
38 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
39 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
40 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
41 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
42 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
43 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
44 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 1 ms 596 KB Output is correct
48 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Partially correct 0 ms 600 KB Failed to provide a successful strategy.
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 344 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 1 ms 600 KB Output is correct
61 Correct 1 ms 348 KB Output is correct
62 Correct 1 ms 348 KB Output is correct
63 Correct 0 ms 344 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
67 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
68 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
69 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
70 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
71 Correct 0 ms 348 KB Output is correct
72 Partially correct 0 ms 344 KB Failed to provide a successful strategy.
73 Correct 0 ms 348 KB Output is correct
74 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
75 Partially correct 0 ms 352 KB Failed to provide a successful strategy.
76 Partially correct 0 ms 352 KB Failed to provide a successful strategy.
77 Partially correct 0 ms 352 KB Failed to provide a successful strategy.
78 Partially correct 0 ms 352 KB Failed to provide a successful strategy.
79 Correct 6 ms 348 KB Output is correct
80 Correct 6 ms 352 KB Output is correct
81 Correct 8 ms 520 KB Output is correct
82 Correct 9 ms 344 KB Output is correct
83 Correct 7 ms 348 KB Output is correct
84 Correct 7 ms 348 KB Output is correct
85 Correct 7 ms 348 KB Output is correct
86 Correct 7 ms 348 KB Output is correct
87 Correct 7 ms 344 KB Output is correct
88 Correct 6 ms 348 KB Output is correct
89 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
90 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
91 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
92 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
93 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
94 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
95 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
96 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
97 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
98 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
99 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
100 Partially correct 1 ms 600 KB Failed to provide a successful strategy.
101 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
102 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
103 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
104 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
105 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
106 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
107 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
108 Partially correct 1 ms 504 KB Failed to provide a successful strategy.
109 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
110 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
111 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
112 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
113 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
114 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
115 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
116 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
117 Partially correct 2 ms 348 KB Failed to provide a successful strategy.
118 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
119 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
120 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
121 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
122 Partially correct 1 ms 344 KB Failed to provide a successful strategy.
123 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
124 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
125 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
126 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
127 Partially correct 0 ms 348 KB Failed to provide a successful strategy.
128 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
129 Correct 9 ms 348 KB Output is correct
130 Correct 9 ms 524 KB Output is correct
131 Correct 9 ms 348 KB Output is correct
132 Correct 9 ms 344 KB Output is correct
133 Correct 9 ms 524 KB Output is correct
134 Correct 10 ms 2392 KB Output is correct
135 Correct 10 ms 2396 KB Output is correct
136 Correct 25 ms 7356 KB Output is correct
137 Correct 15 ms 4188 KB Output is correct
138 Correct 29 ms 5376 KB Output is correct
139 Correct 45 ms 8796 KB Output is correct
140 Correct 8 ms 1880 KB Output is correct
141 Correct 3 ms 860 KB Output is correct
142 Correct 44 ms 8696 KB Output is correct
143 Correct 51 ms 8528 KB Output is correct
144 Partially correct 1 ms 348 KB Failed to provide a successful strategy.
145 Partially correct 1 ms 348 KB Failed to provide a successful strategy.