oj.uz

답안 #925763

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
925763 2024-02-12T08:31:07 Z vjudge1 Joker (BOI20_joker) C++17
14 / 100
 139 ms 15572 KB 
//Bismillahir-Rahmanir-Rahim

#include <bits/stdc++.h>
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops")
//#pragma GCC target("sse,sse2,sse3,sse4,sse4.1,sse4.2,popcnt,avx,avx2")

#define pb push_back
#define pii pair <int, int>
#define pll pair <long long, long long>
#define pld pair <long double, long double>
#define ll long long
#define ld long double
#define x first
#define y second
#define all(v) v.begin(),v.end()
#define sz(s) (int)s.size()
#define skip continue
#define bpop(x) (ll)__builtin_popcountll(x)

using namespace std;

const int N = 2e5 + 7;
const int M = 1e3 + 7;
const int maxA = 2e6 + 7;
const int inf = 1e9 + 7;
const ll INF = 2e18 + 7;
const int MOD = 1e9 + 7;
const ld eps = 1e-9;

pii dir[] = {{0, 1}, {1, 0}, {0, -1}, {-1, 0}};

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

#define int long long

pii E[N];
vector <int> g[N];
int n, m, q, dist[N];
vector <pii> qs;
bool bfs(int st) {
    queue <int> q;
    q.push(st), dist[st] = 0;
    while (!q.empty()) {
        int v = q.front();
        q.pop();
        for (auto to : g[v]) {
            if (dist[to] == -1)dist[to] = 1 - dist[v], q.push(to);
            else if (dist[v] == dist[to]) {
                //cout << v << ':' << dist[v] << ' ' << to << ':' << dist[to] << '\n';
                return 1;
            }
        }
    }
    return 0;
}
void subtask12() {
    for (auto p : qs) {
        int l, r;
        tie(l, r) = p;
        for (int i = 1;i <= n;i++)g[i].clear(), dist[i] = -1;
        for (int i = 1;i <= m;i++) {
            if (l <= i && i <= r)skip;
            g[E[i].x].pb(E[i].y), g[E[i].y].pb(E[i].x);
            //cout << E[i].x << ' ' << E[i].y << '\n';
        }
        bool ans = 0;
        for (int i = 1;i <= n;i++) {
            if (dist[i] == -1)ans |= bfs(i);
        }
        cout << (ans ? "YES" : "NO") << '\n';
    }
    exit(0);
}
int color[N];
int get(int x) {
    return (x == color[x] ? x : color[x] = get(color[x]));
}
void subtask3() {
    for (int i = 1;i <= n;i++)dist[i] = -1, color[i] = i;
    int pos = inf;
    for (int i = 1;i <= m;i++) {
        int x = E[i].x, y = E[i].y;
        if (dist[x] > dist[y])swap(x, y);
        if (dist[x] == -1 && dist[y] == -1)dist[x] = 0, dist[y] = 1, color[x] = y;
        else if (dist[x] == -1)dist[x] = 1 - dist[y], color[x] = y;
        else {
            if (get(x) != get(y))color[get(x)] = color[get(y)];
            else if (dist[x] == dist[y]) {
                pos = i;
                break;
            }
        }
    }
    for (auto p : qs) {
        int r = p.y;
        if (r >= pos)cout << "YES\n";
        else cout << "NO\n";
    }
    exit(0);
}
void solve() {
    cin >> n >> m >> q;
    for (int i = 1;i <= m;i++) {
        int x, y;
        cin >> x >> y;
        E[i] = {x, y};
    }
    bool solve_for_pref = 1;
    for (int i = 0;i < q;i++) {
        int l, r;
        cin >> l >> r;
        qs.pb({l, r});
        solve_for_pref &= (l == 1);
    }
    if (n <= 2000 && m <= 2000 && q <= 2000)subtask12();
    if (solve_for_pref)subtask3();
}
signed main() {
    //srand(time(NULL));
    ios_base::sync_with_stdio(0);
    cout.tie(0);
    //freopen("tests.in", "r", stdin);
    //freopen("milkorder.out", "w", stdout);
    int test = 1;
    //cin >> test;
    for (int t = 1;t <= test;t++) {
        //cout << "Case " << t << ": ";
        solve();
    }
    return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 2 ms 8536 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct
7 Correct 3 ms 8692 KB Output is correct
8 Correct 2 ms 8540 KB Output is correct
9 Correct 3 ms 8540 KB Output is correct
10 Correct 2 ms 8540 KB Output is correct
11 Correct 3 ms 8536 KB Output is correct
12 Correct 3 ms 8536 KB Output is correct
13 Correct 2 ms 8540 KB Output is correct
14 Correct 2 ms 8536 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 3 ms 8628 KB Output is correct
17 Correct 2 ms 8540 KB Output is correct
18 Correct 2 ms 8540 KB Output is correct
19 Correct 3 ms 8540 KB Output is correct
20 Correct 3 ms 8540 KB Output is correct
21 Correct 2 ms 8540 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 2 ms 8540 KB Output is correct
24 Correct 2 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 2 ms 8540 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 2 ms 8536 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct
7 Correct 3 ms 8692 KB Output is correct
8 Correct 2 ms 8540 KB Output is correct
9 Correct 3 ms 8540 KB Output is correct
10 Correct 2 ms 8540 KB Output is correct
11 Correct 3 ms 8536 KB Output is correct
12 Correct 3 ms 8536 KB Output is correct
13 Correct 2 ms 8540 KB Output is correct
14 Correct 2 ms 8536 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 3 ms 8628 KB Output is correct
17 Correct 2 ms 8540 KB Output is correct
18 Correct 2 ms 8540 KB Output is correct
19 Correct 3 ms 8540 KB Output is correct
20 Correct 3 ms 8540 KB Output is correct
21 Correct 2 ms 8540 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 2 ms 8540 KB Output is correct
24 Correct 2 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 2 ms 8540 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 114 ms 8540 KB Output is correct
30 Correct 139 ms 8764 KB Output is correct
31 Correct 110 ms 8536 KB Output is correct
32 Correct 68 ms 8536 KB Output is correct
33 Correct 43 ms 8540 KB Output is correct
34 Correct 139 ms 8764 KB Output is correct
35 Correct 135 ms 8784 KB Output is correct
36 Correct 49 ms 8756 KB Output is correct
37 Correct 93 ms 8540 KB Output is correct
38 Correct 62 ms 8540 KB Output is correct
39 Correct 104 ms 8536 KB Output is correct
40 Correct 65 ms 8536 KB Output is correct
41 Correct 64 ms 8536 KB Output is correct
42 Correct 63 ms 8540 KB Output is correct
43 Correct 37 ms 8776 KB Output is correct
44 Correct 53 ms 8540 KB Output is correct
45 Correct 99 ms 8540 KB Output is correct
46 Correct 115 ms 8540 KB Output is correct
47 Correct 54 ms 8756 KB Output is correct
48 Correct 65 ms 8540 KB Output is correct
49 Correct 95 ms 8764 KB Output is correct
50 Correct 132 ms 8792 KB Output is correct
51 Correct 49 ms 8752 KB Output is correct
52 Correct 68 ms 8540 KB Output is correct
53 Correct 100 ms 8776 KB Output is correct
54 Correct 133 ms 8696 KB Output is correct

Subtask #3
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Incorrect 55 ms 15572 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 2 ms 8536 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct
7 Correct 3 ms 8692 KB Output is correct
8 Correct 2 ms 8540 KB Output is correct
9 Correct 3 ms 8540 KB Output is correct
10 Correct 2 ms 8540 KB Output is correct
11 Correct 3 ms 8536 KB Output is correct
12 Correct 3 ms 8536 KB Output is correct
13 Correct 2 ms 8540 KB Output is correct
14 Correct 2 ms 8536 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 3 ms 8628 KB Output is correct
17 Correct 2 ms 8540 KB Output is correct
18 Correct 2 ms 8540 KB Output is correct
19 Correct 3 ms 8540 KB Output is correct
20 Correct 3 ms 8540 KB Output is correct
21 Correct 2 ms 8540 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 2 ms 8540 KB Output is correct
24 Correct 2 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 2 ms 8540 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Incorrect 55 ms 15572 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 2 ms 8536 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct
7 Correct 3 ms 8692 KB Output is correct
8 Correct 2 ms 8540 KB Output is correct
9 Correct 3 ms 8540 KB Output is correct
10 Correct 2 ms 8540 KB Output is correct
11 Correct 3 ms 8536 KB Output is correct
12 Correct 3 ms 8536 KB Output is correct
13 Correct 2 ms 8540 KB Output is correct
14 Correct 2 ms 8536 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 3 ms 8628 KB Output is correct
17 Correct 2 ms 8540 KB Output is correct
18 Correct 2 ms 8540 KB Output is correct
19 Correct 3 ms 8540 KB Output is correct
20 Correct 3 ms 8540 KB Output is correct
21 Correct 2 ms 8540 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 2 ms 8540 KB Output is correct
24 Correct 2 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 2 ms 8540 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 114 ms 8540 KB Output is correct
30 Correct 139 ms 8764 KB Output is correct
31 Correct 110 ms 8536 KB Output is correct
32 Correct 68 ms 8536 KB Output is correct
33 Correct 43 ms 8540 KB Output is correct
34 Correct 139 ms 8764 KB Output is correct
35 Correct 135 ms 8784 KB Output is correct
36 Correct 49 ms 8756 KB Output is correct
37 Correct 93 ms 8540 KB Output is correct
38 Correct 62 ms 8540 KB Output is correct
39 Correct 104 ms 8536 KB Output is correct
40 Correct 65 ms 8536 KB Output is correct
41 Correct 64 ms 8536 KB Output is correct
42 Correct 63 ms 8540 KB Output is correct
43 Correct 37 ms 8776 KB Output is correct
44 Correct 53 ms 8540 KB Output is correct
45 Correct 99 ms 8540 KB Output is correct
46 Correct 115 ms 8540 KB Output is correct
47 Correct 54 ms 8756 KB Output is correct
48 Correct 65 ms 8540 KB Output is correct
49 Correct 95 ms 8764 KB Output is correct
50 Correct 132 ms 8792 KB Output is correct
51 Correct 49 ms 8752 KB Output is correct
52 Correct 68 ms 8540 KB Output is correct
53 Correct 100 ms 8776 KB Output is correct
54 Correct 133 ms 8696 KB Output is correct
55 Incorrect 25 ms 11092 KB Output isn't correct
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 2 ms 8536 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct
7 Correct 3 ms 8692 KB Output is correct
8 Correct 2 ms 8540 KB Output is correct
9 Correct 3 ms 8540 KB Output is correct
10 Correct 2 ms 8540 KB Output is correct
11 Correct 3 ms 8536 KB Output is correct
12 Correct 3 ms 8536 KB Output is correct
13 Correct 2 ms 8540 KB Output is correct
14 Correct 2 ms 8536 KB Output is correct
15 Correct 2 ms 8540 KB Output is correct
16 Correct 3 ms 8628 KB Output is correct
17 Correct 2 ms 8540 KB Output is correct
18 Correct 2 ms 8540 KB Output is correct
19 Correct 3 ms 8540 KB Output is correct
20 Correct 3 ms 8540 KB Output is correct
21 Correct 2 ms 8540 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 2 ms 8540 KB Output is correct
24 Correct 2 ms 8540 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 2 ms 8540 KB Output is correct
27 Correct 2 ms 8540 KB Output is correct
28 Correct 2 ms 8540 KB Output is correct
29 Correct 114 ms 8540 KB Output is correct
30 Correct 139 ms 8764 KB Output is correct
31 Correct 110 ms 8536 KB Output is correct
32 Correct 68 ms 8536 KB Output is correct
33 Correct 43 ms 8540 KB Output is correct
34 Correct 139 ms 8764 KB Output is correct
35 Correct 135 ms 8784 KB Output is correct
36 Correct 49 ms 8756 KB Output is correct
37 Correct 93 ms 8540 KB Output is correct
38 Correct 62 ms 8540 KB Output is correct
39 Correct 104 ms 8536 KB Output is correct
40 Correct 65 ms 8536 KB Output is correct
41 Correct 64 ms 8536 KB Output is correct
42 Correct 63 ms 8540 KB Output is correct
43 Correct 37 ms 8776 KB Output is correct
44 Correct 53 ms 8540 KB Output is correct
45 Correct 99 ms 8540 KB Output is correct
46 Correct 115 ms 8540 KB Output is correct
47 Correct 54 ms 8756 KB Output is correct
48 Correct 65 ms 8540 KB Output is correct
49 Correct 95 ms 8764 KB Output is correct
50 Correct 132 ms 8792 KB Output is correct
51 Correct 49 ms 8752 KB Output is correct
52 Correct 68 ms 8540 KB Output is correct
53 Correct 100 ms 8776 KB Output is correct
54 Correct 133 ms 8696 KB Output is correct
55 Incorrect 55 ms 15572 KB Output isn't correct
56 Halted 0 ms 0 KB -