oj.uz

Submission #649836

# Submission time Handle Problem Language Result Execution time Memory
649836 2022-10-11T11:51:39 Z welleyth Joker (BOI20_joker) C++17
39 / 100
 2000 ms 36164 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;

//#define int long long
#define pb push_back
#define mp make_pair

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

constexpr int N = (int)2e5 + 111;
constexpr int md = (int)2e5 + 111;

mt19937 rnd(time(nullptr));

vector<int> g[N];
bool used[2][N];
bool c[2][N];

bool dfs(int v,int r,int pr = -1){
    used[r][v] = true;
    c[r][v] = true;
    for(auto& to : g[v]){
        if(pr == to)
            continue;
        if(used[r^1][to]){
            if(c[r][v]&c[r][to])
                return true;
            continue;
        }
        c[r^1][to] = true;
        if(dfs(to,r^1,v))
            return true;
    }
    return false;
}

int n,m,q;
vector<pair<int,int>> edges;

bool can(int l,int r){
    for(int j = 0; j <= n; j++){
        used[0][j] = false;
        used[1][j] = false;
        c[0][j] = c[1][j] = 0;
        g[j].clear();
    }
    bool have = false;
    for(int j = 0; j < l-1; j++){
        auto&[a,b] = edges[j];
        g[a].pb(b);
        g[b].pb(a);
    }
    for(int j = r; j < m; j++){
        auto&[a,b] = edges[j];
        g[a].pb(b);
        g[b].pb(a);
    }
    for(int j = 1; j <= n; j++){
        if(!used[0][j] && !used[1][j]){
            c[0][j] = 1;
            if(dfs(j,0)){
                return true;
            }
        }
    }
    return false;
}

void solve(){
    cin >> n >> m >> q;

    for(int i = 0; i < m; i++){
        int a,b;
        cin >> a >> b;
        edges.pb(mp(a,b));
    }

    bool answer[q];
    bool f = true;
    if(!can(1,0))
        f = false;

    vector<pair<int,int>> Queries[m+1];

    for(int i = 0; i < q; i++){
        int l,r;
        cin >> l >> r;
        if(!f){
            cout << "NO\n";
            continue;
        }
        Queries[l].pb(mp(r,i));
    }
    if(!f)
        return;
    for(int i = 0; i <= m; i++){
        if(Queries[i].empty())
            continue;
        sort(Queries[i].rbegin(),Queries[i].rend());
        if(!can(i,i)){
            for(auto&[r,id] : Queries[i]){
                answer[id] = 0;
            }
            continue;
        }
        int L = i, R = m;
        while(R - L > 1){
            int mid = (L+R)>>1;
            if(can(i,mid))
                L = mid;
            else
                R = mid;
        }
        while(!can(i,R))R--;
        for(auto&[r,id] : Queries[i]){
            if(r <= R && f)
                answer[id] = 1;
            else
                answer[id] = 0;
        }
    }

    for(int i = 0; i < q; i++){
        cout << (answer[i] ? "YES" : "NO") << "\n";
    }

    return;
}

signed main(){
    ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
//    init();
    int tests = 1;
//    cin >> tests;
    for(int test = 1; test <= tests; test++){
//        cerr << "test = " << test << "\n";
        solve();
    }
    return 0;
}
/**
6 8 2
1 3
1 5
1 6
2 5
2 6
3 4
3 5
5 6
4 7
4 8

**/

Compilation message

Joker.cpp: In function 'bool can(int, int)':
Joker.cpp:52:10: warning: unused variable 'have' [-Wunused-variable]
   52 |     bool have = false;
      |          ^~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 7 ms 4948 KB Output is correct
9 Correct 6 ms 4948 KB Output is correct
10 Correct 5 ms 4948 KB Output is correct
11 Correct 7 ms 5068 KB Output is correct
12 Correct 7 ms 4948 KB Output is correct
13 Correct 7 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 8 ms 4948 KB Output is correct
16 Correct 6 ms 5064 KB Output is correct
17 Correct 5 ms 4948 KB Output is correct
18 Correct 5 ms 4948 KB Output is correct
19 Correct 6 ms 5056 KB Output is correct
20 Correct 5 ms 4948 KB Output is correct
21 Correct 5 ms 4948 KB Output is correct
22 Correct 7 ms 4960 KB Output is correct
23 Correct 6 ms 4948 KB Output is correct
24 Correct 6 ms 5040 KB Output is correct
25 Correct 6 ms 5060 KB Output is correct
26 Correct 6 ms 4948 KB Output is correct
27 Correct 6 ms 4948 KB Output is correct
28 Correct 7 ms 4948 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 7 ms 4948 KB Output is correct
9 Correct 6 ms 4948 KB Output is correct
10 Correct 5 ms 4948 KB Output is correct
11 Correct 7 ms 5068 KB Output is correct
12 Correct 7 ms 4948 KB Output is correct
13 Correct 7 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 8 ms 4948 KB Output is correct
16 Correct 6 ms 5064 KB Output is correct
17 Correct 5 ms 4948 KB Output is correct
18 Correct 5 ms 4948 KB Output is correct
19 Correct 6 ms 5056 KB Output is correct
20 Correct 5 ms 4948 KB Output is correct
21 Correct 5 ms 4948 KB Output is correct
22 Correct 7 ms 4960 KB Output is correct
23 Correct 6 ms 4948 KB Output is correct
24 Correct 6 ms 5040 KB Output is correct
25 Correct 6 ms 5060 KB Output is correct
26 Correct 6 ms 4948 KB Output is correct
27 Correct 6 ms 4948 KB Output is correct
28 Correct 7 ms 4948 KB Output is correct
29 Correct 3 ms 5076 KB Output is correct
30 Correct 463 ms 5204 KB Output is correct
31 Correct 455 ms 5212 KB Output is correct
32 Correct 346 ms 5204 KB Output is correct
33 Correct 282 ms 5076 KB Output is correct
34 Correct 466 ms 5224 KB Output is correct
35 Correct 544 ms 5220 KB Output is correct
36 Correct 426 ms 5332 KB Output is correct
37 Correct 655 ms 5204 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct
39 Correct 424 ms 5228 KB Output is correct
40 Correct 338 ms 5208 KB Output is correct
41 Correct 334 ms 5328 KB Output is correct
42 Correct 330 ms 5204 KB Output is correct
43 Correct 287 ms 5204 KB Output is correct
44 Correct 365 ms 5200 KB Output is correct
45 Correct 433 ms 5208 KB Output is correct
46 Correct 527 ms 5216 KB Output is correct
47 Correct 342 ms 5196 KB Output is correct
48 Correct 355 ms 5188 KB Output is correct
49 Correct 371 ms 5204 KB Output is correct
50 Correct 438 ms 5204 KB Output is correct
51 Correct 319 ms 5324 KB Output is correct
52 Correct 357 ms 5204 KB Output is correct
53 Correct 421 ms 5324 KB Output is correct
54 Correct 478 ms 5228 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 295 ms 26088 KB Output is correct
4 Correct 125 ms 19200 KB Output is correct
5 Correct 314 ms 22308 KB Output is correct
6 Correct 437 ms 20196 KB Output is correct
7 Correct 409 ms 19140 KB Output is correct
8 Correct 263 ms 20592 KB Output is correct
9 Correct 412 ms 20996 KB Output is correct
10 Correct 810 ms 20836 KB Output is correct
11 Correct 296 ms 19040 KB Output is correct
12 Correct 407 ms 20476 KB Output is correct
13 Correct 179 ms 18312 KB Output is correct
14 Correct 276 ms 20520 KB Output is correct
15 Correct 359 ms 20200 KB Output is correct
16 Correct 447 ms 20848 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 7 ms 4948 KB Output is correct
9 Correct 6 ms 4948 KB Output is correct
10 Correct 5 ms 4948 KB Output is correct
11 Correct 7 ms 5068 KB Output is correct
12 Correct 7 ms 4948 KB Output is correct
13 Correct 7 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 8 ms 4948 KB Output is correct
16 Correct 6 ms 5064 KB Output is correct
17 Correct 5 ms 4948 KB Output is correct
18 Correct 5 ms 4948 KB Output is correct
19 Correct 6 ms 5056 KB Output is correct
20 Correct 5 ms 4948 KB Output is correct
21 Correct 5 ms 4948 KB Output is correct
22 Correct 7 ms 4960 KB Output is correct
23 Correct 6 ms 4948 KB Output is correct
24 Correct 6 ms 5040 KB Output is correct
25 Correct 6 ms 5060 KB Output is correct
26 Correct 6 ms 4948 KB Output is correct
27 Correct 6 ms 4948 KB Output is correct
28 Correct 7 ms 4948 KB Output is correct
29 Correct 295 ms 26088 KB Output is correct
30 Correct 125 ms 19200 KB Output is correct
31 Correct 314 ms 22308 KB Output is correct
32 Correct 437 ms 20196 KB Output is correct
33 Correct 409 ms 19140 KB Output is correct
34 Correct 263 ms 20592 KB Output is correct
35 Correct 412 ms 20996 KB Output is correct
36 Correct 810 ms 20836 KB Output is correct
37 Correct 296 ms 19040 KB Output is correct
38 Correct 407 ms 20476 KB Output is correct
39 Correct 179 ms 18312 KB Output is correct
40 Correct 276 ms 20520 KB Output is correct
41 Correct 359 ms 20200 KB Output is correct
42 Correct 447 ms 20848 KB Output is correct
43 Execution timed out 2090 ms 36164 KB Time limit exceeded
44 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 7 ms 4948 KB Output is correct
9 Correct 6 ms 4948 KB Output is correct
10 Correct 5 ms 4948 KB Output is correct
11 Correct 7 ms 5068 KB Output is correct
12 Correct 7 ms 4948 KB Output is correct
13 Correct 7 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 8 ms 4948 KB Output is correct
16 Correct 6 ms 5064 KB Output is correct
17 Correct 5 ms 4948 KB Output is correct
18 Correct 5 ms 4948 KB Output is correct
19 Correct 6 ms 5056 KB Output is correct
20 Correct 5 ms 4948 KB Output is correct
21 Correct 5 ms 4948 KB Output is correct
22 Correct 7 ms 4960 KB Output is correct
23 Correct 6 ms 4948 KB Output is correct
24 Correct 6 ms 5040 KB Output is correct
25 Correct 6 ms 5060 KB Output is correct
26 Correct 6 ms 4948 KB Output is correct
27 Correct 6 ms 4948 KB Output is correct
28 Correct 7 ms 4948 KB Output is correct
29 Correct 3 ms 5076 KB Output is correct
30 Correct 463 ms 5204 KB Output is correct
31 Correct 455 ms 5212 KB Output is correct
32 Correct 346 ms 5204 KB Output is correct
33 Correct 282 ms 5076 KB Output is correct
34 Correct 466 ms 5224 KB Output is correct
35 Correct 544 ms 5220 KB Output is correct
36 Correct 426 ms 5332 KB Output is correct
37 Correct 655 ms 5204 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct
39 Correct 424 ms 5228 KB Output is correct
40 Correct 338 ms 5208 KB Output is correct
41 Correct 334 ms 5328 KB Output is correct
42 Correct 330 ms 5204 KB Output is correct
43 Correct 287 ms 5204 KB Output is correct
44 Correct 365 ms 5200 KB Output is correct
45 Correct 433 ms 5208 KB Output is correct
46 Correct 527 ms 5216 KB Output is correct
47 Correct 342 ms 5196 KB Output is correct
48 Correct 355 ms 5188 KB Output is correct
49 Correct 371 ms 5204 KB Output is correct
50 Correct 438 ms 5204 KB Output is correct
51 Correct 319 ms 5324 KB Output is correct
52 Correct 357 ms 5204 KB Output is correct
53 Correct 421 ms 5324 KB Output is correct
54 Correct 478 ms 5228 KB Output is correct
55 Execution timed out 2097 ms 19864 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 7 ms 4948 KB Output is correct
9 Correct 6 ms 4948 KB Output is correct
10 Correct 5 ms 4948 KB Output is correct
11 Correct 7 ms 5068 KB Output is correct
12 Correct 7 ms 4948 KB Output is correct
13 Correct 7 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 8 ms 4948 KB Output is correct
16 Correct 6 ms 5064 KB Output is correct
17 Correct 5 ms 4948 KB Output is correct
18 Correct 5 ms 4948 KB Output is correct
19 Correct 6 ms 5056 KB Output is correct
20 Correct 5 ms 4948 KB Output is correct
21 Correct 5 ms 4948 KB Output is correct
22 Correct 7 ms 4960 KB Output is correct
23 Correct 6 ms 4948 KB Output is correct
24 Correct 6 ms 5040 KB Output is correct
25 Correct 6 ms 5060 KB Output is correct
26 Correct 6 ms 4948 KB Output is correct
27 Correct 6 ms 4948 KB Output is correct
28 Correct 7 ms 4948 KB Output is correct
29 Correct 3 ms 5076 KB Output is correct
30 Correct 463 ms 5204 KB Output is correct
31 Correct 455 ms 5212 KB Output is correct
32 Correct 346 ms 5204 KB Output is correct
33 Correct 282 ms 5076 KB Output is correct
34 Correct 466 ms 5224 KB Output is correct
35 Correct 544 ms 5220 KB Output is correct
36 Correct 426 ms 5332 KB Output is correct
37 Correct 655 ms 5204 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct
39 Correct 424 ms 5228 KB Output is correct
40 Correct 338 ms 5208 KB Output is correct
41 Correct 334 ms 5328 KB Output is correct
42 Correct 330 ms 5204 KB Output is correct
43 Correct 287 ms 5204 KB Output is correct
44 Correct 365 ms 5200 KB Output is correct
45 Correct 433 ms 5208 KB Output is correct
46 Correct 527 ms 5216 KB Output is correct
47 Correct 342 ms 5196 KB Output is correct
48 Correct 355 ms 5188 KB Output is correct
49 Correct 371 ms 5204 KB Output is correct
50 Correct 438 ms 5204 KB Output is correct
51 Correct 319 ms 5324 KB Output is correct
52 Correct 357 ms 5204 KB Output is correct
53 Correct 421 ms 5324 KB Output is correct
54 Correct 478 ms 5228 KB Output is correct
55 Correct 295 ms 26088 KB Output is correct
56 Correct 125 ms 19200 KB Output is correct
57 Correct 314 ms 22308 KB Output is correct
58 Correct 437 ms 20196 KB Output is correct
59 Correct 409 ms 19140 KB Output is correct
60 Correct 263 ms 20592 KB Output is correct
61 Correct 412 ms 20996 KB Output is correct
62 Correct 810 ms 20836 KB Output is correct
63 Correct 296 ms 19040 KB Output is correct
64 Correct 407 ms 20476 KB Output is correct
65 Correct 179 ms 18312 KB Output is correct
66 Correct 276 ms 20520 KB Output is correct
67 Correct 359 ms 20200 KB Output is correct
68 Correct 447 ms 20848 KB Output is correct
69 Execution timed out 2090 ms 36164 KB Time limit exceeded
70 Halted 0 ms 0 KB -