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Submission #1046771

# Submission time Handle Problem Language Result Execution time Memory
1046771 2024-08-06T22:30:14 Z Lobo Joker (BOI20_joker) C++17
14 / 100
 2000 ms 36528 KB 
#include<bits/stdc++.h>
using namespace std;
const long long inf = 1e18 + 10;
const int inf1 = 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
const int maxn = 2e5+10;
const int B = 100000;
int n, m, q, col[maxn], colc[2*maxn], ansl[maxn];
vector<int> g[maxn], gc[2*maxn]; 
pair<int,int> edg[maxn];

bool okcol;
void dfscol(int u) {
    for(auto v : g[u]) {
        if(col[v] == -1) {
            col[v] = (col[u]^1);
            dfscol(v);
        }
        else if(col[v] != (col[u]^1)) {
            okcol = 0;
        }
    }
}
bool okcolc;
void dfscolc(int u) {
    for(auto v : gc[u]) {
        if(colc[v] == -1) {
            colc[v] = (colc[u]^1);
            dfscolc(v);
        }
        else if(colc[v] != (colc[u]^1)) {
            okcolc = 0;
        }
    }
}

void solve() {
    cin >> n >> m >> q;
    for(int i = 1; i <= m; i++) {
        int u,v;
        cin >> u >> v;
        edg[i] = mp(u,v);
    }

    int bLl = 0;
    int bLr = min(m+1,B-1);
    int bRl = 1;
    int bRr = min(m+1,B);
    while(bLl != m+1) {
        for(int i = 1; i <= n; i++) {
            g[i].clear();
            col[i] = -1;
        }
        for(int i = 1; i <= bLl-1; i++) {
            int u = edg[i].fr;
            int v = edg[i].sc;
            g[u].pb(v);
            g[v].pb(u);
        }
        for(int i = bRr+1; i <= m; i++) {
            int u = edg[i].fr;
            int v = edg[i].sc;
            g[u].pb(v);
            g[v].pb(u);
        }
        int cntcol = 0;
        okcol = 1;
        for(int i = 1; i <= n; i++) {
            if(col[i] == -1) {
                colc[cntcol] = -1;
                colc[cntcol+1] = -1;
                col[i] = cntcol;
                cntcol = cntcol+2;
                dfscol(i);
            }
        }
        // if(okcol == 0) {
        //     if(bRr == m+1) {
        //         for(int i = bLl; i <= m+1; i++) {
        //             ansl[i] = inf;
        //         }
        //         bLl = m+1;
        //         continue;
        //     }
        //     bRl = min(m+1,bRr+1);
        //     bRr = min(m+1,bRl+B-1);
        //     continue;
        // }

        int L = bLl;
        int R = bRl;

        while(L <= bLr and R <= bRr) {
            vector<int> verts;
            for(int i = bLl; i <= L; i++) {
                if(i == 0 or i == m+1) continue;
                int u = edg[i].fr; verts.pb(u);
                int v = edg[i].sc; verts.pb(v);
                gc[col[u]].pb(col[v]);
                gc[col[v]].pb(col[u]);
            }
            for(int i = R; i <= bRr; i++) {
                if(i == 0 or i == m+1) continue;
                int u = edg[i].fr; verts.pb(u);
                int v = edg[i].sc; verts.pb(v);
                gc[col[u]].pb(col[v]);
                gc[col[v]].pb(col[u]);
            }
            okcolc = 1;
            for(auto i : verts) {
                if(colc[col[i]] == -1) {
                    colc[col[i]] = 0;
                    dfscolc(col[i]);
                }
            }

            if(okcolc == 1 and okcol == 1) {
                ansl[L] = R;
                L++;
            }
            else if(R == m+1) {
                ansl[L] = inf;
                L++;
            }
            else {
                R++;
            }

            for(auto i : verts) {
                colc[col[i]] = -1;
                gc[col[i]].clear();
            }
        }

        bLl = min(m+1,L);
        bLr = (min(m+1,bLl+B-1));
        bRl = min(m+1,R);
        bRr = min(m+1,bRl+B-1);
    }
    for(int i = 1; i <= q; i++) {
        int l,r;
        cin >> l >> r;
        if(ansl[l-1] <= r+1) {
            cout << "NO" << endl;
        }
        else {
            cout << "YES" << endl;
        }
    }
}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    #ifndef ONLINE_JUDGE
  //  freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    #endif

    int tt = 1;
    // cin >> tt;
    while(tt--) {
        solve();
    }

}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 20828 KB Output is correct
2 Correct 2 ms 20828 KB Output is correct
3 Correct 2 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 2 ms 20828 KB Output is correct
6 Correct 2 ms 20980 KB Output is correct
7 Correct 3 ms 20824 KB Output is correct
8 Correct 3 ms 20828 KB Output is correct
9 Correct 3 ms 20828 KB Output is correct
10 Correct 3 ms 20828 KB Output is correct
11 Correct 3 ms 20828 KB Output is correct
12 Correct 3 ms 20828 KB Output is correct
13 Correct 3 ms 20828 KB Output is correct
14 Correct 3 ms 20980 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20824 KB Output is correct
17 Correct 3 ms 20828 KB Output is correct
18 Correct 3 ms 20980 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20824 KB Output is correct
21 Correct 3 ms 20828 KB Output is correct
22 Correct 4 ms 21008 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 3 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 3 ms 20828 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20828 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 20828 KB Output is correct
2 Correct 2 ms 20828 KB Output is correct
3 Correct 2 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 2 ms 20828 KB Output is correct
6 Correct 2 ms 20980 KB Output is correct
7 Correct 3 ms 20824 KB Output is correct
8 Correct 3 ms 20828 KB Output is correct
9 Correct 3 ms 20828 KB Output is correct
10 Correct 3 ms 20828 KB Output is correct
11 Correct 3 ms 20828 KB Output is correct
12 Correct 3 ms 20828 KB Output is correct
13 Correct 3 ms 20828 KB Output is correct
14 Correct 3 ms 20980 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20824 KB Output is correct
17 Correct 3 ms 20828 KB Output is correct
18 Correct 3 ms 20980 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20824 KB Output is correct
21 Correct 3 ms 20828 KB Output is correct
22 Correct 4 ms 21008 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 3 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 3 ms 20828 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20828 KB Output is correct
29 Correct 33 ms 21136 KB Output is correct
30 Correct 89 ms 21084 KB Output is correct
31 Correct 103 ms 21084 KB Output is correct
32 Correct 101 ms 21080 KB Output is correct
33 Correct 86 ms 21180 KB Output is correct
34 Correct 101 ms 21080 KB Output is correct
35 Correct 129 ms 21084 KB Output is correct
36 Correct 105 ms 21080 KB Output is correct
37 Correct 119 ms 21080 KB Output is correct
38 Correct 114 ms 21264 KB Output is correct
39 Correct 77 ms 21084 KB Output is correct
40 Correct 84 ms 21336 KB Output is correct
41 Correct 86 ms 21080 KB Output is correct
42 Correct 89 ms 21080 KB Output is correct
43 Correct 84 ms 21084 KB Output is correct
44 Correct 95 ms 21084 KB Output is correct
45 Correct 99 ms 21080 KB Output is correct
46 Correct 107 ms 21188 KB Output is correct
47 Correct 85 ms 21084 KB Output is correct
48 Correct 91 ms 21084 KB Output is correct
49 Correct 89 ms 21184 KB Output is correct
50 Correct 97 ms 21080 KB Output is correct
51 Correct 88 ms 21184 KB Output is correct
52 Correct 98 ms 21080 KB Output is correct
53 Correct 101 ms 21084 KB Output is correct
54 Correct 108 ms 21192 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 20828 KB Output is correct
2 Correct 2 ms 20828 KB Output is correct
3 Execution timed out 2060 ms 36528 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 20828 KB Output is correct
2 Correct 2 ms 20828 KB Output is correct
3 Correct 2 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 2 ms 20828 KB Output is correct
6 Correct 2 ms 20980 KB Output is correct
7 Correct 3 ms 20824 KB Output is correct
8 Correct 3 ms 20828 KB Output is correct
9 Correct 3 ms 20828 KB Output is correct
10 Correct 3 ms 20828 KB Output is correct
11 Correct 3 ms 20828 KB Output is correct
12 Correct 3 ms 20828 KB Output is correct
13 Correct 3 ms 20828 KB Output is correct
14 Correct 3 ms 20980 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20824 KB Output is correct
17 Correct 3 ms 20828 KB Output is correct
18 Correct 3 ms 20980 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20824 KB Output is correct
21 Correct 3 ms 20828 KB Output is correct
22 Correct 4 ms 21008 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 3 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 3 ms 20828 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20828 KB Output is correct
29 Execution timed out 2060 ms 36528 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 20828 KB Output is correct
2 Correct 2 ms 20828 KB Output is correct
3 Correct 2 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 2 ms 20828 KB Output is correct
6 Correct 2 ms 20980 KB Output is correct
7 Correct 3 ms 20824 KB Output is correct
8 Correct 3 ms 20828 KB Output is correct
9 Correct 3 ms 20828 KB Output is correct
10 Correct 3 ms 20828 KB Output is correct
11 Correct 3 ms 20828 KB Output is correct
12 Correct 3 ms 20828 KB Output is correct
13 Correct 3 ms 20828 KB Output is correct
14 Correct 3 ms 20980 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20824 KB Output is correct
17 Correct 3 ms 20828 KB Output is correct
18 Correct 3 ms 20980 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20824 KB Output is correct
21 Correct 3 ms 20828 KB Output is correct
22 Correct 4 ms 21008 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 3 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 3 ms 20828 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20828 KB Output is correct
29 Correct 33 ms 21136 KB Output is correct
30 Correct 89 ms 21084 KB Output is correct
31 Correct 103 ms 21084 KB Output is correct
32 Correct 101 ms 21080 KB Output is correct
33 Correct 86 ms 21180 KB Output is correct
34 Correct 101 ms 21080 KB Output is correct
35 Correct 129 ms 21084 KB Output is correct
36 Correct 105 ms 21080 KB Output is correct
37 Correct 119 ms 21080 KB Output is correct
38 Correct 114 ms 21264 KB Output is correct
39 Correct 77 ms 21084 KB Output is correct
40 Correct 84 ms 21336 KB Output is correct
41 Correct 86 ms 21080 KB Output is correct
42 Correct 89 ms 21080 KB Output is correct
43 Correct 84 ms 21084 KB Output is correct
44 Correct 95 ms 21084 KB Output is correct
45 Correct 99 ms 21080 KB Output is correct
46 Correct 107 ms 21188 KB Output is correct
47 Correct 85 ms 21084 KB Output is correct
48 Correct 91 ms 21084 KB Output is correct
49 Correct 89 ms 21184 KB Output is correct
50 Correct 97 ms 21080 KB Output is correct
51 Correct 88 ms 21184 KB Output is correct
52 Correct 98 ms 21080 KB Output is correct
53 Correct 101 ms 21084 KB Output is correct
54 Correct 108 ms 21192 KB Output is correct
55 Execution timed out 2063 ms 36520 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 20828 KB Output is correct
2 Correct 2 ms 20828 KB Output is correct
3 Correct 2 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 2 ms 20828 KB Output is correct
6 Correct 2 ms 20980 KB Output is correct
7 Correct 3 ms 20824 KB Output is correct
8 Correct 3 ms 20828 KB Output is correct
9 Correct 3 ms 20828 KB Output is correct
10 Correct 3 ms 20828 KB Output is correct
11 Correct 3 ms 20828 KB Output is correct
12 Correct 3 ms 20828 KB Output is correct
13 Correct 3 ms 20828 KB Output is correct
14 Correct 3 ms 20980 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20824 KB Output is correct
17 Correct 3 ms 20828 KB Output is correct
18 Correct 3 ms 20980 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20824 KB Output is correct
21 Correct 3 ms 20828 KB Output is correct
22 Correct 4 ms 21008 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 3 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 3 ms 20828 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20828 KB Output is correct
29 Correct 33 ms 21136 KB Output is correct
30 Correct 89 ms 21084 KB Output is correct
31 Correct 103 ms 21084 KB Output is correct
32 Correct 101 ms 21080 KB Output is correct
33 Correct 86 ms 21180 KB Output is correct
34 Correct 101 ms 21080 KB Output is correct
35 Correct 129 ms 21084 KB Output is correct
36 Correct 105 ms 21080 KB Output is correct
37 Correct 119 ms 21080 KB Output is correct
38 Correct 114 ms 21264 KB Output is correct
39 Correct 77 ms 21084 KB Output is correct
40 Correct 84 ms 21336 KB Output is correct
41 Correct 86 ms 21080 KB Output is correct
42 Correct 89 ms 21080 KB Output is correct
43 Correct 84 ms 21084 KB Output is correct
44 Correct 95 ms 21084 KB Output is correct
45 Correct 99 ms 21080 KB Output is correct
46 Correct 107 ms 21188 KB Output is correct
47 Correct 85 ms 21084 KB Output is correct
48 Correct 91 ms 21084 KB Output is correct
49 Correct 89 ms 21184 KB Output is correct
50 Correct 97 ms 21080 KB Output is correct
51 Correct 88 ms 21184 KB Output is correct
52 Correct 98 ms 21080 KB Output is correct
53 Correct 101 ms 21084 KB Output is correct
54 Correct 108 ms 21192 KB Output is correct
55 Execution timed out 2060 ms 36528 KB Time limit exceeded
56 Halted 0 ms 0 KB -