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Submission #438670

# Submission time Handle Problem Language Result Execution time Memory
438670 2021-06-28T12:24:31 Z soroush Joker (BOI20_joker) C++17
14 / 100
 2000 ms 5504 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int , int> pii;

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

const int maxn = 2e5;
const ll mod = 1e9+7;

#define pb push_back
#define endl '\n'
#define dokme(x) cout << x , exit(0)
#define ms(x , y) memset(x , y , sizeof x)
ll pw(ll a, ll b, ll md = mod){ll res = 1;while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}

int n, m, q;
int a[maxn], b[maxn], l[maxn], r[maxn];
int par[maxn], sz[maxn];
bool val[maxn];

int getpar(int v){
	return ((~par[v]) ? getpar(par[v]) : v);
}

bool getval(int v){
	return ((~par[v]) ? val[v] ^ getval(par[v]) : val[v]);
}

bool merge(int v, int u){
	int pu = getpar(u) , pv = getpar(v);
	if(pu == pv)
		return getval(u) == getval(v);
	if(sz[pu] > sz[pv])swap(pu , pv);
	val[pu] ^= getval(v) == getval(u);
	par[pu] = pv;
	sz[pv] += sz[pu];
	return 0;
}

bool solve(int l , int r){
	for(int i = 0 ; i < l ; i ++){
		if(merge(a[i], b[i])){
			if(i > n){
				for(int j = 0 ; j < n ; j ++)
					par[j] = -1, val[j] = 0, sz[j] = 1;
			}
			else{
				for(int j = 0; j <= i ; j ++)
					par[a[j]] = par[b[j]] = -1 , val[a[j]] = val[b[j]] = 0 , sz[a[j]] = sz[b[j]] = 1;
			}
			return 1;
		}
	}
	for(int i = r ; i < m ; i ++){
		if(merge(a[i], b[i])){
			if(l + i - r > n){
				for(int j = 0 ; j < n ; j ++)
					par[j] = -1, val[j] = 0 , sz[j] = 1;
			}
			else{
				for(int j = 0; j < l ; j ++)
					par[a[j]] = par[b[j]] = -1 , val[a[j]] = val[b[j]] = 0 , sz[a[j]] = sz[b[j]] = 1;
				for(int j = r ; j <= i ; j ++)
					par[a[j]] = par[b[j]] = -1 , val[a[j]] = val[b[j]] = 0 , sz[a[j]] = sz[b[j]] = 1;
			}
			return 1;
		}
	}
	if(m - r - l < n){
		for(int j = 0; j < l ; j ++)
			par[a[j]] = par[b[j]] = -1 , val[a[j]] = val[b[j]] = 0 , sz[a[j]] = sz[b[j]] = 1;
		for(int j = r ; j < m ; j ++)
			par[a[j]] = par[b[j]] = -1 , val[a[j]] = val[b[j]] = 0 , sz[a[j]] = sz[b[j]] = 1;
	}
	else{
		for(int j = 0 ; j < n ; j ++)
			par[j] = -1, val[j] = 0 , sz[j] = 1;
	}
	return 0;
}

int32_t main(){
	ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin >> n >> m >> q;
	ms(par, -1);
	for(int i = 0 ; i < m ; i ++)
		cin >> a[i] >> b[i] , a[i] -- , b[i] --;
	for(int i = 0 ; i < n ; i ++)sz[i] = 1;
	for(int i = 0 ; i < q ; i ++)
		cin >> l[i] >> r[i], l[i] --;
	for(int i = 0 ; i < q ; i ++)
		cout << (solve(l[i] , r[i]) ? "YES" : "NO") << endl;
	return(0);
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1100 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 2 ms 1096 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 2 ms 1092 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct
11 Correct 2 ms 1100 KB Output is correct
12 Correct 2 ms 1092 KB Output is correct
13 Correct 1 ms 1100 KB Output is correct
14 Correct 2 ms 1100 KB Output is correct
15 Correct 2 ms 1092 KB Output is correct
16 Correct 2 ms 1100 KB Output is correct
17 Correct 1 ms 1088 KB Output is correct
18 Correct 1 ms 1100 KB Output is correct
19 Correct 1 ms 1092 KB Output is correct
20 Correct 2 ms 1100 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 2 ms 1100 KB Output is correct
23 Correct 2 ms 1100 KB Output is correct
24 Correct 2 ms 1100 KB Output is correct
25 Correct 1 ms 1100 KB Output is correct
26 Correct 1 ms 1100 KB Output is correct
27 Correct 1 ms 1100 KB Output is correct
28 Correct 2 ms 1100 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1100 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 2 ms 1096 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 2 ms 1092 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct
11 Correct 2 ms 1100 KB Output is correct
12 Correct 2 ms 1092 KB Output is correct
13 Correct 1 ms 1100 KB Output is correct
14 Correct 2 ms 1100 KB Output is correct
15 Correct 2 ms 1092 KB Output is correct
16 Correct 2 ms 1100 KB Output is correct
17 Correct 1 ms 1088 KB Output is correct
18 Correct 1 ms 1100 KB Output is correct
19 Correct 1 ms 1092 KB Output is correct
20 Correct 2 ms 1100 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 2 ms 1100 KB Output is correct
23 Correct 2 ms 1100 KB Output is correct
24 Correct 2 ms 1100 KB Output is correct
25 Correct 1 ms 1100 KB Output is correct
26 Correct 1 ms 1100 KB Output is correct
27 Correct 1 ms 1100 KB Output is correct
28 Correct 2 ms 1100 KB Output is correct
29 Correct 32 ms 1100 KB Output is correct
30 Correct 42 ms 1208 KB Output is correct
31 Correct 31 ms 1204 KB Output is correct
32 Correct 19 ms 1204 KB Output is correct
33 Correct 12 ms 1204 KB Output is correct
34 Correct 25 ms 1208 KB Output is correct
35 Correct 41 ms 1152 KB Output is correct
36 Correct 34 ms 1212 KB Output is correct
37 Correct 67 ms 1196 KB Output is correct
38 Correct 87 ms 1184 KB Output is correct
39 Correct 43 ms 1104 KB Output is correct
40 Correct 32 ms 1196 KB Output is correct
41 Correct 29 ms 1100 KB Output is correct
42 Correct 29 ms 1208 KB Output is correct
43 Correct 43 ms 1196 KB Output is correct
44 Correct 48 ms 1200 KB Output is correct
45 Correct 37 ms 1144 KB Output is correct
46 Correct 38 ms 1100 KB Output is correct
47 Correct 32 ms 1100 KB Output is correct
48 Correct 32 ms 1212 KB Output is correct
49 Correct 36 ms 1212 KB Output is correct
50 Correct 38 ms 1204 KB Output is correct
51 Correct 37 ms 1100 KB Output is correct
52 Correct 38 ms 1200 KB Output is correct
53 Correct 41 ms 1104 KB Output is correct
54 Correct 40 ms 1220 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1100 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Execution timed out 2066 ms 4704 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 1100 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 2 ms 1096 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 2 ms 1092 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct
11 Correct 2 ms 1100 KB Output is correct
12 Correct 2 ms 1092 KB Output is correct
13 Correct 1 ms 1100 KB Output is correct
14 Correct 2 ms 1100 KB Output is correct
15 Correct 2 ms 1092 KB Output is correct
16 Correct 2 ms 1100 KB Output is correct
17 Correct 1 ms 1088 KB Output is correct
18 Correct 1 ms 1100 KB Output is correct
19 Correct 1 ms 1092 KB Output is correct
20 Correct 2 ms 1100 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 2 ms 1100 KB Output is correct
23 Correct 2 ms 1100 KB Output is correct
24 Correct 2 ms 1100 KB Output is correct
25 Correct 1 ms 1100 KB Output is correct
26 Correct 1 ms 1100 KB Output is correct
27 Correct 1 ms 1100 KB Output is correct
28 Correct 2 ms 1100 KB Output is correct
29 Execution timed out 2066 ms 4704 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 1100 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 2 ms 1096 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 2 ms 1092 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct
11 Correct 2 ms 1100 KB Output is correct
12 Correct 2 ms 1092 KB Output is correct
13 Correct 1 ms 1100 KB Output is correct
14 Correct 2 ms 1100 KB Output is correct
15 Correct 2 ms 1092 KB Output is correct
16 Correct 2 ms 1100 KB Output is correct
17 Correct 1 ms 1088 KB Output is correct
18 Correct 1 ms 1100 KB Output is correct
19 Correct 1 ms 1092 KB Output is correct
20 Correct 2 ms 1100 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 2 ms 1100 KB Output is correct
23 Correct 2 ms 1100 KB Output is correct
24 Correct 2 ms 1100 KB Output is correct
25 Correct 1 ms 1100 KB Output is correct
26 Correct 1 ms 1100 KB Output is correct
27 Correct 1 ms 1100 KB Output is correct
28 Correct 2 ms 1100 KB Output is correct
29 Correct 32 ms 1100 KB Output is correct
30 Correct 42 ms 1208 KB Output is correct
31 Correct 31 ms 1204 KB Output is correct
32 Correct 19 ms 1204 KB Output is correct
33 Correct 12 ms 1204 KB Output is correct
34 Correct 25 ms 1208 KB Output is correct
35 Correct 41 ms 1152 KB Output is correct
36 Correct 34 ms 1212 KB Output is correct
37 Correct 67 ms 1196 KB Output is correct
38 Correct 87 ms 1184 KB Output is correct
39 Correct 43 ms 1104 KB Output is correct
40 Correct 32 ms 1196 KB Output is correct
41 Correct 29 ms 1100 KB Output is correct
42 Correct 29 ms 1208 KB Output is correct
43 Correct 43 ms 1196 KB Output is correct
44 Correct 48 ms 1200 KB Output is correct
45 Correct 37 ms 1144 KB Output is correct
46 Correct 38 ms 1100 KB Output is correct
47 Correct 32 ms 1100 KB Output is correct
48 Correct 32 ms 1212 KB Output is correct
49 Correct 36 ms 1212 KB Output is correct
50 Correct 38 ms 1204 KB Output is correct
51 Correct 37 ms 1100 KB Output is correct
52 Correct 38 ms 1200 KB Output is correct
53 Correct 41 ms 1104 KB Output is correct
54 Correct 40 ms 1220 KB Output is correct
55 Execution timed out 2072 ms 5504 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 1100 KB Output is correct
2 Correct 1 ms 1100 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 1100 KB Output is correct
5 Correct 1 ms 1100 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 2 ms 1096 KB Output is correct
8 Correct 2 ms 1100 KB Output is correct
9 Correct 2 ms 1092 KB Output is correct
10 Correct 1 ms 1100 KB Output is correct
11 Correct 2 ms 1100 KB Output is correct
12 Correct 2 ms 1092 KB Output is correct
13 Correct 1 ms 1100 KB Output is correct
14 Correct 2 ms 1100 KB Output is correct
15 Correct 2 ms 1092 KB Output is correct
16 Correct 2 ms 1100 KB Output is correct
17 Correct 1 ms 1088 KB Output is correct
18 Correct 1 ms 1100 KB Output is correct
19 Correct 1 ms 1092 KB Output is correct
20 Correct 2 ms 1100 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 2 ms 1100 KB Output is correct
23 Correct 2 ms 1100 KB Output is correct
24 Correct 2 ms 1100 KB Output is correct
25 Correct 1 ms 1100 KB Output is correct
26 Correct 1 ms 1100 KB Output is correct
27 Correct 1 ms 1100 KB Output is correct
28 Correct 2 ms 1100 KB Output is correct
29 Correct 32 ms 1100 KB Output is correct
30 Correct 42 ms 1208 KB Output is correct
31 Correct 31 ms 1204 KB Output is correct
32 Correct 19 ms 1204 KB Output is correct
33 Correct 12 ms 1204 KB Output is correct
34 Correct 25 ms 1208 KB Output is correct
35 Correct 41 ms 1152 KB Output is correct
36 Correct 34 ms 1212 KB Output is correct
37 Correct 67 ms 1196 KB Output is correct
38 Correct 87 ms 1184 KB Output is correct
39 Correct 43 ms 1104 KB Output is correct
40 Correct 32 ms 1196 KB Output is correct
41 Correct 29 ms 1100 KB Output is correct
42 Correct 29 ms 1208 KB Output is correct
43 Correct 43 ms 1196 KB Output is correct
44 Correct 48 ms 1200 KB Output is correct
45 Correct 37 ms 1144 KB Output is correct
46 Correct 38 ms 1100 KB Output is correct
47 Correct 32 ms 1100 KB Output is correct
48 Correct 32 ms 1212 KB Output is correct
49 Correct 36 ms 1212 KB Output is correct
50 Correct 38 ms 1204 KB Output is correct
51 Correct 37 ms 1100 KB Output is correct
52 Correct 38 ms 1200 KB Output is correct
53 Correct 41 ms 1104 KB Output is correct
54 Correct 40 ms 1220 KB Output is correct
55 Execution timed out 2066 ms 4704 KB Time limit exceeded
56 Halted 0 ms 0 KB -