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Submission #1045305

# Submission time Handle Problem Language Result Execution time Memory
1045305 2024-08-05T20:14:24 Z Lobo Joker (BOI20_joker) C++17
14 / 100
 2000 ms 32692 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 = 10000;
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);

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

}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 20824 KB Output is correct
2 Correct 2 ms 20824 KB Output is correct
3 Correct 3 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 3 ms 20828 KB Output is correct
6 Correct 2 ms 20984 KB Output is correct
7 Correct 3 ms 20928 KB Output is correct
8 Correct 4 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 4 ms 20828 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20828 KB Output is correct
17 Correct 3 ms 21008 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20828 KB Output is correct
21 Correct 4 ms 20828 KB Output is correct
22 Correct 3 ms 20828 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 4 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 4 ms 20908 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20928 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 20824 KB Output is correct
2 Correct 2 ms 20824 KB Output is correct
3 Correct 3 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 3 ms 20828 KB Output is correct
6 Correct 2 ms 20984 KB Output is correct
7 Correct 3 ms 20928 KB Output is correct
8 Correct 4 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 4 ms 20828 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20828 KB Output is correct
17 Correct 3 ms 21008 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20828 KB Output is correct
21 Correct 4 ms 20828 KB Output is correct
22 Correct 3 ms 20828 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 4 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 4 ms 20908 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20928 KB Output is correct
29 Correct 33 ms 21084 KB Output is correct
30 Correct 95 ms 21084 KB Output is correct
31 Correct 107 ms 21336 KB Output is correct
32 Correct 104 ms 21080 KB Output is correct
33 Correct 87 ms 21140 KB Output is correct
34 Correct 102 ms 21080 KB Output is correct
35 Correct 119 ms 21328 KB Output is correct
36 Correct 90 ms 21084 KB Output is correct
37 Correct 117 ms 21160 KB Output is correct
38 Correct 119 ms 21084 KB Output is correct
39 Correct 79 ms 21084 KB Output is correct
40 Correct 88 ms 21084 KB Output is correct
41 Correct 86 ms 21084 KB Output is correct
42 Correct 85 ms 21084 KB Output is correct
43 Correct 83 ms 21084 KB Output is correct
44 Correct 95 ms 21080 KB Output is correct
45 Correct 97 ms 21084 KB Output is correct
46 Correct 133 ms 21080 KB Output is correct
47 Correct 87 ms 21084 KB Output is correct
48 Correct 89 ms 21084 KB Output is correct
49 Correct 93 ms 21328 KB Output is correct
50 Correct 94 ms 21084 KB Output is correct
51 Correct 90 ms 21148 KB Output is correct
52 Correct 96 ms 21084 KB Output is correct
53 Correct 104 ms 21084 KB Output is correct
54 Correct 108 ms 21084 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 20824 KB Output is correct
2 Correct 2 ms 20824 KB Output is correct
3 Execution timed out 2073 ms 31164 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 20824 KB Output is correct
2 Correct 2 ms 20824 KB Output is correct
3 Correct 3 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 3 ms 20828 KB Output is correct
6 Correct 2 ms 20984 KB Output is correct
7 Correct 3 ms 20928 KB Output is correct
8 Correct 4 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 4 ms 20828 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20828 KB Output is correct
17 Correct 3 ms 21008 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20828 KB Output is correct
21 Correct 4 ms 20828 KB Output is correct
22 Correct 3 ms 20828 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 4 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 4 ms 20908 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20928 KB Output is correct
29 Execution timed out 2073 ms 31164 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 20824 KB Output is correct
2 Correct 2 ms 20824 KB Output is correct
3 Correct 3 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 3 ms 20828 KB Output is correct
6 Correct 2 ms 20984 KB Output is correct
7 Correct 3 ms 20928 KB Output is correct
8 Correct 4 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 4 ms 20828 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20828 KB Output is correct
17 Correct 3 ms 21008 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20828 KB Output is correct
21 Correct 4 ms 20828 KB Output is correct
22 Correct 3 ms 20828 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 4 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 4 ms 20908 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20928 KB Output is correct
29 Correct 33 ms 21084 KB Output is correct
30 Correct 95 ms 21084 KB Output is correct
31 Correct 107 ms 21336 KB Output is correct
32 Correct 104 ms 21080 KB Output is correct
33 Correct 87 ms 21140 KB Output is correct
34 Correct 102 ms 21080 KB Output is correct
35 Correct 119 ms 21328 KB Output is correct
36 Correct 90 ms 21084 KB Output is correct
37 Correct 117 ms 21160 KB Output is correct
38 Correct 119 ms 21084 KB Output is correct
39 Correct 79 ms 21084 KB Output is correct
40 Correct 88 ms 21084 KB Output is correct
41 Correct 86 ms 21084 KB Output is correct
42 Correct 85 ms 21084 KB Output is correct
43 Correct 83 ms 21084 KB Output is correct
44 Correct 95 ms 21080 KB Output is correct
45 Correct 97 ms 21084 KB Output is correct
46 Correct 133 ms 21080 KB Output is correct
47 Correct 87 ms 21084 KB Output is correct
48 Correct 89 ms 21084 KB Output is correct
49 Correct 93 ms 21328 KB Output is correct
50 Correct 94 ms 21084 KB Output is correct
51 Correct 90 ms 21148 KB Output is correct
52 Correct 96 ms 21084 KB Output is correct
53 Correct 104 ms 21084 KB Output is correct
54 Correct 108 ms 21084 KB Output is correct
55 Execution timed out 2033 ms 32692 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 20824 KB Output is correct
2 Correct 2 ms 20824 KB Output is correct
3 Correct 3 ms 20828 KB Output is correct
4 Correct 2 ms 20828 KB Output is correct
5 Correct 3 ms 20828 KB Output is correct
6 Correct 2 ms 20984 KB Output is correct
7 Correct 3 ms 20928 KB Output is correct
8 Correct 4 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 4 ms 20828 KB Output is correct
15 Correct 3 ms 20828 KB Output is correct
16 Correct 3 ms 20828 KB Output is correct
17 Correct 3 ms 21008 KB Output is correct
18 Correct 4 ms 20828 KB Output is correct
19 Correct 3 ms 20828 KB Output is correct
20 Correct 3 ms 20828 KB Output is correct
21 Correct 4 ms 20828 KB Output is correct
22 Correct 3 ms 20828 KB Output is correct
23 Correct 3 ms 20828 KB Output is correct
24 Correct 4 ms 20828 KB Output is correct
25 Correct 3 ms 20828 KB Output is correct
26 Correct 4 ms 20908 KB Output is correct
27 Correct 3 ms 20828 KB Output is correct
28 Correct 3 ms 20928 KB Output is correct
29 Correct 33 ms 21084 KB Output is correct
30 Correct 95 ms 21084 KB Output is correct
31 Correct 107 ms 21336 KB Output is correct
32 Correct 104 ms 21080 KB Output is correct
33 Correct 87 ms 21140 KB Output is correct
34 Correct 102 ms 21080 KB Output is correct
35 Correct 119 ms 21328 KB Output is correct
36 Correct 90 ms 21084 KB Output is correct
37 Correct 117 ms 21160 KB Output is correct
38 Correct 119 ms 21084 KB Output is correct
39 Correct 79 ms 21084 KB Output is correct
40 Correct 88 ms 21084 KB Output is correct
41 Correct 86 ms 21084 KB Output is correct
42 Correct 85 ms 21084 KB Output is correct
43 Correct 83 ms 21084 KB Output is correct
44 Correct 95 ms 21080 KB Output is correct
45 Correct 97 ms 21084 KB Output is correct
46 Correct 133 ms 21080 KB Output is correct
47 Correct 87 ms 21084 KB Output is correct
48 Correct 89 ms 21084 KB Output is correct
49 Correct 93 ms 21328 KB Output is correct
50 Correct 94 ms 21084 KB Output is correct
51 Correct 90 ms 21148 KB Output is correct
52 Correct 96 ms 21084 KB Output is correct
53 Correct 104 ms 21084 KB Output is correct
54 Correct 108 ms 21084 KB Output is correct
55 Execution timed out 2073 ms 31164 KB Time limit exceeded
56 Halted 0 ms 0 KB -