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Submission #1045337

# Submission time Handle Problem Language Result Execution time Memory
1045337 2024-08-05T20:41:54 Z Lobo Joker (BOI20_joker) C++17
14 / 100
 2000 ms 32300 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 = 500;
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);
            }
        }
        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(col[u]); verts.pb((col[u]^1));
                int v = edg[i].sc; verts.pb(col[v]); verts.pb((col[v]^1));
                gc[col[u]].pb(col[v]);
                gc[(col[u]^1)].pb((col[v]^1));
                gc[col[v]].pb(col[u]);
                gc[(col[v]^1)].pb((col[u]^1));
            }
            for(int i = R; i <= bRr; i++) {
                if(i == 0 or i == m+1) continue;
                int u = edg[i].fr; verts.pb(col[u]); verts.pb((col[u]^1));
                int v = edg[i].sc; verts.pb(col[v]); verts.pb((col[v]^1));
                gc[col[u]].pb(col[v]);
                gc[(col[u]^1)].pb((col[v]^1));
                gc[col[v]].pb(col[u]);
                gc[(col[v]^1)].pb((col[u]^1));
            }
            for(auto i : verts) {
                gc[i].pb((i^1));
            }
            okcolc = 1;
            for(auto i : verts) {
                if(colc[i] == -1) {
                    colc[i] = 0;
                    dfscolc(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[i] = -1;
                gc[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);

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

}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 20980 KB Output is correct
6 Correct 2 ms 20828 KB Output is correct
7 Correct 3 ms 20828 KB Output is correct
8 Correct 4 ms 20828 KB Output is correct
9 Correct 4 ms 20936 KB Output is correct
10 Correct 4 ms 21000 KB Output is correct
11 Correct 5 ms 20824 KB Output is correct
12 Correct 4 ms 20828 KB Output is correct
13 Correct 5 ms 20828 KB Output is correct
14 Correct 6 ms 21044 KB Output is correct
15 Correct 6 ms 20828 KB Output is correct
16 Correct 5 ms 21040 KB Output is correct
17 Correct 4 ms 21040 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 5 ms 20828 KB Output is correct
20 Correct 4 ms 20924 KB Output is correct
21 Correct 5 ms 20828 KB Output is correct
22 Correct 4 ms 20828 KB Output is correct
23 Correct 4 ms 20824 KB Output is correct
24 Correct 4 ms 21040 KB Output is correct
25 Correct 4 ms 20828 KB Output is correct
26 Correct 4 ms 20828 KB Output is correct
27 Correct 4 ms 20828 KB Output is correct
28 Correct 4 ms 20828 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 20980 KB Output is correct
6 Correct 2 ms 20828 KB Output is correct
7 Correct 3 ms 20828 KB Output is correct
8 Correct 4 ms 20828 KB Output is correct
9 Correct 4 ms 20936 KB Output is correct
10 Correct 4 ms 21000 KB Output is correct
11 Correct 5 ms 20824 KB Output is correct
12 Correct 4 ms 20828 KB Output is correct
13 Correct 5 ms 20828 KB Output is correct
14 Correct 6 ms 21044 KB Output is correct
15 Correct 6 ms 20828 KB Output is correct
16 Correct 5 ms 21040 KB Output is correct
17 Correct 4 ms 21040 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 5 ms 20828 KB Output is correct
20 Correct 4 ms 20924 KB Output is correct
21 Correct 5 ms 20828 KB Output is correct
22 Correct 4 ms 20828 KB Output is correct
23 Correct 4 ms 20824 KB Output is correct
24 Correct 4 ms 21040 KB Output is correct
25 Correct 4 ms 20828 KB Output is correct
26 Correct 4 ms 20828 KB Output is correct
27 Correct 4 ms 20828 KB Output is correct
28 Correct 4 ms 20828 KB Output is correct
29 Correct 41 ms 21084 KB Output is correct
30 Correct 62 ms 21084 KB Output is correct
31 Correct 74 ms 21244 KB Output is correct
32 Correct 59 ms 21084 KB Output is correct
33 Correct 47 ms 21224 KB Output is correct
34 Correct 55 ms 21080 KB Output is correct
35 Correct 90 ms 21328 KB Output is correct
36 Correct 68 ms 21080 KB Output is correct
37 Correct 68 ms 21184 KB Output is correct
38 Correct 71 ms 21184 KB Output is correct
39 Correct 66 ms 21296 KB Output is correct
40 Correct 58 ms 21256 KB Output is correct
41 Correct 53 ms 21212 KB Output is correct
42 Correct 45 ms 21080 KB Output is correct
43 Correct 45 ms 21080 KB Output is correct
44 Correct 60 ms 21080 KB Output is correct
45 Correct 54 ms 21336 KB Output is correct
46 Correct 74 ms 21328 KB Output is correct
47 Correct 67 ms 21084 KB Output is correct
48 Correct 63 ms 21084 KB Output is correct
49 Correct 71 ms 21304 KB Output is correct
50 Correct 85 ms 21360 KB Output is correct
51 Correct 47 ms 21276 KB Output is correct
52 Correct 60 ms 21336 KB Output is correct
53 Correct 56 ms 21328 KB Output is correct
54 Correct 73 ms 21220 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 20828 KB Output is correct
2 Correct 2 ms 20828 KB Output is correct
3 Execution timed out 2037 ms 31056 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 20980 KB Output is correct
6 Correct 2 ms 20828 KB Output is correct
7 Correct 3 ms 20828 KB Output is correct
8 Correct 4 ms 20828 KB Output is correct
9 Correct 4 ms 20936 KB Output is correct
10 Correct 4 ms 21000 KB Output is correct
11 Correct 5 ms 20824 KB Output is correct
12 Correct 4 ms 20828 KB Output is correct
13 Correct 5 ms 20828 KB Output is correct
14 Correct 6 ms 21044 KB Output is correct
15 Correct 6 ms 20828 KB Output is correct
16 Correct 5 ms 21040 KB Output is correct
17 Correct 4 ms 21040 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 5 ms 20828 KB Output is correct
20 Correct 4 ms 20924 KB Output is correct
21 Correct 5 ms 20828 KB Output is correct
22 Correct 4 ms 20828 KB Output is correct
23 Correct 4 ms 20824 KB Output is correct
24 Correct 4 ms 21040 KB Output is correct
25 Correct 4 ms 20828 KB Output is correct
26 Correct 4 ms 20828 KB Output is correct
27 Correct 4 ms 20828 KB Output is correct
28 Correct 4 ms 20828 KB Output is correct
29 Execution timed out 2037 ms 31056 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 20980 KB Output is correct
6 Correct 2 ms 20828 KB Output is correct
7 Correct 3 ms 20828 KB Output is correct
8 Correct 4 ms 20828 KB Output is correct
9 Correct 4 ms 20936 KB Output is correct
10 Correct 4 ms 21000 KB Output is correct
11 Correct 5 ms 20824 KB Output is correct
12 Correct 4 ms 20828 KB Output is correct
13 Correct 5 ms 20828 KB Output is correct
14 Correct 6 ms 21044 KB Output is correct
15 Correct 6 ms 20828 KB Output is correct
16 Correct 5 ms 21040 KB Output is correct
17 Correct 4 ms 21040 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 5 ms 20828 KB Output is correct
20 Correct 4 ms 20924 KB Output is correct
21 Correct 5 ms 20828 KB Output is correct
22 Correct 4 ms 20828 KB Output is correct
23 Correct 4 ms 20824 KB Output is correct
24 Correct 4 ms 21040 KB Output is correct
25 Correct 4 ms 20828 KB Output is correct
26 Correct 4 ms 20828 KB Output is correct
27 Correct 4 ms 20828 KB Output is correct
28 Correct 4 ms 20828 KB Output is correct
29 Correct 41 ms 21084 KB Output is correct
30 Correct 62 ms 21084 KB Output is correct
31 Correct 74 ms 21244 KB Output is correct
32 Correct 59 ms 21084 KB Output is correct
33 Correct 47 ms 21224 KB Output is correct
34 Correct 55 ms 21080 KB Output is correct
35 Correct 90 ms 21328 KB Output is correct
36 Correct 68 ms 21080 KB Output is correct
37 Correct 68 ms 21184 KB Output is correct
38 Correct 71 ms 21184 KB Output is correct
39 Correct 66 ms 21296 KB Output is correct
40 Correct 58 ms 21256 KB Output is correct
41 Correct 53 ms 21212 KB Output is correct
42 Correct 45 ms 21080 KB Output is correct
43 Correct 45 ms 21080 KB Output is correct
44 Correct 60 ms 21080 KB Output is correct
45 Correct 54 ms 21336 KB Output is correct
46 Correct 74 ms 21328 KB Output is correct
47 Correct 67 ms 21084 KB Output is correct
48 Correct 63 ms 21084 KB Output is correct
49 Correct 71 ms 21304 KB Output is correct
50 Correct 85 ms 21360 KB Output is correct
51 Correct 47 ms 21276 KB Output is correct
52 Correct 60 ms 21336 KB Output is correct
53 Correct 56 ms 21328 KB Output is correct
54 Correct 73 ms 21220 KB Output is correct
55 Execution timed out 2059 ms 32300 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 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 20980 KB Output is correct
6 Correct 2 ms 20828 KB Output is correct
7 Correct 3 ms 20828 KB Output is correct
8 Correct 4 ms 20828 KB Output is correct
9 Correct 4 ms 20936 KB Output is correct
10 Correct 4 ms 21000 KB Output is correct
11 Correct 5 ms 20824 KB Output is correct
12 Correct 4 ms 20828 KB Output is correct
13 Correct 5 ms 20828 KB Output is correct
14 Correct 6 ms 21044 KB Output is correct
15 Correct 6 ms 20828 KB Output is correct
16 Correct 5 ms 21040 KB Output is correct
17 Correct 4 ms 21040 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 5 ms 20828 KB Output is correct
20 Correct 4 ms 20924 KB Output is correct
21 Correct 5 ms 20828 KB Output is correct
22 Correct 4 ms 20828 KB Output is correct
23 Correct 4 ms 20824 KB Output is correct
24 Correct 4 ms 21040 KB Output is correct
25 Correct 4 ms 20828 KB Output is correct
26 Correct 4 ms 20828 KB Output is correct
27 Correct 4 ms 20828 KB Output is correct
28 Correct 4 ms 20828 KB Output is correct
29 Correct 41 ms 21084 KB Output is correct
30 Correct 62 ms 21084 KB Output is correct
31 Correct 74 ms 21244 KB Output is correct
32 Correct 59 ms 21084 KB Output is correct
33 Correct 47 ms 21224 KB Output is correct
34 Correct 55 ms 21080 KB Output is correct
35 Correct 90 ms 21328 KB Output is correct
36 Correct 68 ms 21080 KB Output is correct
37 Correct 68 ms 21184 KB Output is correct
38 Correct 71 ms 21184 KB Output is correct
39 Correct 66 ms 21296 KB Output is correct
40 Correct 58 ms 21256 KB Output is correct
41 Correct 53 ms 21212 KB Output is correct
42 Correct 45 ms 21080 KB Output is correct
43 Correct 45 ms 21080 KB Output is correct
44 Correct 60 ms 21080 KB Output is correct
45 Correct 54 ms 21336 KB Output is correct
46 Correct 74 ms 21328 KB Output is correct
47 Correct 67 ms 21084 KB Output is correct
48 Correct 63 ms 21084 KB Output is correct
49 Correct 71 ms 21304 KB Output is correct
50 Correct 85 ms 21360 KB Output is correct
51 Correct 47 ms 21276 KB Output is correct
52 Correct 60 ms 21336 KB Output is correct
53 Correct 56 ms 21328 KB Output is correct
54 Correct 73 ms 21220 KB Output is correct
55 Execution timed out 2037 ms 31056 KB Time limit exceeded
56 Halted 0 ms 0 KB -