oj.uz

Submission #869023

# Submission time Handle Problem Language Result Execution time Memory
869023 2023-11-03T01:47:49 Z prohacker Joker (BOI20_joker) C++14
14 / 100
 2000 ms 7612 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define pii pair<int,int>
#define mp make_pair

using namespace std;

const int N = 2e5+10;
const int INF = INT_MAX;
const int mod = 1e9+7;

int n,m,q;
pair<int,int> edges[N];
int color[N],lab[N];

void make_set() {
    for(int i = 1 ; i <= n ; i++) {
        lab[i] = i;
        color[i] = 0;
    }
}

pii Find(int u) {
    if(u == lab[u]) {
        return pii(u,color[u]);
    }
    pii p = Find(lab[u]);
    lab[u] = p.first;
    color[u] = (color[u]^p.second);
    return pii(lab[u],color[u]);
}

bool join(int u, int v, int c) {
    pii hihi = Find(u);
    pii hehe = Find(v);
    if(hihi.first == hehe.first) {
        if(hihi.second^hehe.second^c) {
            return false;
        }
        return true;
    }
    lab[hehe.first] = hihi.first;
    color[hehe.first] = (color[u]^color[v]^c);
    return true;
}

signed main()
{
    if (fopen("solve.inp", "r")) {
        freopen("solve.inp", "r", stdin);
        freopen("solve.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m >> q;
    for(int i = 1 ; i <= m ; i++) {
        int u,v; cin >> u >> v;
        edges[i] = {u,v};
    }
    while(q--) {
        int l,r; cin >> l >> r;
        make_set();
        for(int i = 1 ; i < l ; i++) {
            if(!join(edges[i].first,edges[i].second,1)) {
                goto done;
            }
        }
        for(int i = r+1 ; i <= m ; i++) {
            if(!join(edges[i].first,edges[i].second,1)) {
                goto done;
            }
        }
        cout << "NO" << '\n';
        continue;
        done:;
        cout << "YES" << '\n';
    }
    return 0;
}

Compilation message

Joker.cpp: In function 'int main()':
Joker.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen("solve.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Joker.cpp:52:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen("solve.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2520 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 2 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2520 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 2 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 18 ms 2396 KB Output is correct
30 Correct 22 ms 2560 KB Output is correct
31 Correct 20 ms 2396 KB Output is correct
32 Correct 12 ms 2392 KB Output is correct
33 Correct 8 ms 2408 KB Output is correct
34 Correct 15 ms 2556 KB Output is correct
35 Correct 27 ms 2396 KB Output is correct
36 Correct 17 ms 2392 KB Output is correct
37 Correct 40 ms 2396 KB Output is correct
38 Correct 60 ms 2396 KB Output is correct
39 Correct 36 ms 2396 KB Output is correct
40 Correct 18 ms 2392 KB Output is correct
41 Correct 18 ms 2396 KB Output is correct
42 Correct 18 ms 2652 KB Output is correct
43 Correct 35 ms 2396 KB Output is correct
44 Correct 30 ms 2536 KB Output is correct
45 Correct 22 ms 2396 KB Output is correct
46 Correct 22 ms 2648 KB Output is correct
47 Correct 23 ms 2396 KB Output is correct
48 Correct 21 ms 2392 KB Output is correct
49 Correct 21 ms 2392 KB Output is correct
50 Correct 22 ms 2560 KB Output is correct
51 Correct 26 ms 2396 KB Output is correct
52 Correct 24 ms 2396 KB Output is correct
53 Correct 23 ms 2396 KB Output is correct
54 Correct 26 ms 2392 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Execution timed out 2100 ms 7496 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2520 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 2 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Execution timed out 2100 ms 7496 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2520 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 2 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 18 ms 2396 KB Output is correct
30 Correct 22 ms 2560 KB Output is correct
31 Correct 20 ms 2396 KB Output is correct
32 Correct 12 ms 2392 KB Output is correct
33 Correct 8 ms 2408 KB Output is correct
34 Correct 15 ms 2556 KB Output is correct
35 Correct 27 ms 2396 KB Output is correct
36 Correct 17 ms 2392 KB Output is correct
37 Correct 40 ms 2396 KB Output is correct
38 Correct 60 ms 2396 KB Output is correct
39 Correct 36 ms 2396 KB Output is correct
40 Correct 18 ms 2392 KB Output is correct
41 Correct 18 ms 2396 KB Output is correct
42 Correct 18 ms 2652 KB Output is correct
43 Correct 35 ms 2396 KB Output is correct
44 Correct 30 ms 2536 KB Output is correct
45 Correct 22 ms 2396 KB Output is correct
46 Correct 22 ms 2648 KB Output is correct
47 Correct 23 ms 2396 KB Output is correct
48 Correct 21 ms 2392 KB Output is correct
49 Correct 21 ms 2392 KB Output is correct
50 Correct 22 ms 2560 KB Output is correct
51 Correct 26 ms 2396 KB Output is correct
52 Correct 24 ms 2396 KB Output is correct
53 Correct 23 ms 2396 KB Output is correct
54 Correct 26 ms 2392 KB Output is correct
55 Execution timed out 2025 ms 7612 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2520 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 2 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2396 KB Output is correct
22 Correct 1 ms 2396 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 18 ms 2396 KB Output is correct
30 Correct 22 ms 2560 KB Output is correct
31 Correct 20 ms 2396 KB Output is correct
32 Correct 12 ms 2392 KB Output is correct
33 Correct 8 ms 2408 KB Output is correct
34 Correct 15 ms 2556 KB Output is correct
35 Correct 27 ms 2396 KB Output is correct
36 Correct 17 ms 2392 KB Output is correct
37 Correct 40 ms 2396 KB Output is correct
38 Correct 60 ms 2396 KB Output is correct
39 Correct 36 ms 2396 KB Output is correct
40 Correct 18 ms 2392 KB Output is correct
41 Correct 18 ms 2396 KB Output is correct
42 Correct 18 ms 2652 KB Output is correct
43 Correct 35 ms 2396 KB Output is correct
44 Correct 30 ms 2536 KB Output is correct
45 Correct 22 ms 2396 KB Output is correct
46 Correct 22 ms 2648 KB Output is correct
47 Correct 23 ms 2396 KB Output is correct
48 Correct 21 ms 2392 KB Output is correct
49 Correct 21 ms 2392 KB Output is correct
50 Correct 22 ms 2560 KB Output is correct
51 Correct 26 ms 2396 KB Output is correct
52 Correct 24 ms 2396 KB Output is correct
53 Correct 23 ms 2396 KB Output is correct
54 Correct 26 ms 2392 KB Output is correct
55 Execution timed out 2100 ms 7496 KB Time limit exceeded
56 Halted 0 ms 0 KB -