QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#688244 | #9155. 集合 | nor | 100 ✓ | 708ms | 19732kb | C++17 | 2.0kb | 2024-10-30 01:27:55 | 2024-10-30 01:27:57 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll MOD = 1e9 + 7;
ll pw(ll b, ll e) {
ll r = 1;
while (e) {
if (e & 1) {
r = r * b % MOD;
}
b = b * b % MOD;
e >>= 1;
}
return r;
}
ll inv(ll b) { return pw(b, MOD - 2); }
const int MAX_N = 2e5 + 5, MAX_M = 6e5 + 5;
vector<int> cs[2];
ll tot_hash[2] = {1, 1};
ll mask_hash[2][MAX_M];
ll pow2[MAX_N];
void sub_tot(ll &tot, ll mask) {
tot *= inv(mask + 1);
tot %= MOD;
}
void add_tot(ll &tot, ll mask) {
tot *= mask + 1;
tot %= MOD;
}
void toggle_idx(int idx, bool add) {
for (int k = 0; k < 3; k++) {
for (int t = 0; t < 2; t++) {
int val = cs[t][3 * idx + k];
ll &mask = mask_hash[t][val];
sub_tot(tot_hash[t], mask);
mask += add ? pow2[idx] : MOD - pow2[idx];
if (mask >= MOD) {
mask -= MOD;
}
add_tot(tot_hash[t], mask);
}
}
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
int n, m, q;
cin >> n >> m >> q;
pow2[0] = 1;
for (int i = 1; i < n; i++) {
pow2[i] = pow2[i - 1] << 1;
if (pow2[i] >= MOD) {
pow2[i] -= MOD;
}
}
for (int t = 0; t < 2; t++) {
cs[t].resize(3 * n);
for (int &c : cs[t]) {
cin >> c;
}
}
vector<int> max_r(n);
int r_ptr = 0;
for (int i = 0; i < n; i++) {
while (r_ptr < n && tot_hash[0] == tot_hash[1]) {
toggle_idx(r_ptr++, true);
}
if (tot_hash[0] != tot_hash[1]) {
toggle_idx(--r_ptr, false);
}
max_r[i] = r_ptr;
toggle_idx(i, false);
}
for (int qi = 0; qi < q; qi++) {
int a, b;
cin >> a >> b;
cout << (max_r[a - 1] >= b ? "Yes\n" : "No\n");
}
return 0;
}
Details
Pretests
Pretest #1:
score: 5
Accepted
time: 1ms
memory: 3628kb
Pretest #2:
score: 5
Accepted
time: 1ms
memory: 3608kb
Pretest #3:
score: 5
Accepted
time: 1ms
memory: 3608kb
Pretest #4:
score: 5
Accepted
time: 1ms
memory: 3628kb
Pretest #5:
score: 5
Accepted
time: 1ms
memory: 3568kb
Pretest #6:
score: 5
Accepted
time: 1ms
memory: 3632kb
Pretest #7:
score: 5
Accepted
time: 1ms
memory: 3820kb
Pretest #8:
score: 5
Accepted
time: 1ms
memory: 3576kb
Pretest #9:
score: 5
Accepted
time: 19ms
memory: 3648kb
Pretest #10:
score: 5
Accepted
time: 20ms
memory: 3580kb
Pretest #11:
score: 5
Accepted
time: 578ms
memory: 10176kb
Pretest #12:
score: 5
Accepted
time: 570ms
memory: 10332kb
Pretest #13:
score: 5
Accepted
time: 6ms
memory: 3640kb
Pretest #14:
score: 5
Accepted
time: 6ms
memory: 3732kb
Pretest #15:
score: 5
Accepted
time: 97ms
memory: 3712kb
Pretest #16:
score: 5
Accepted
time: 109ms
memory: 3736kb
Pretest #17:
score: 5
Accepted
time: 56ms
memory: 3920kb
Pretest #18:
score: 5
Accepted
time: 57ms
memory: 4968kb
Pretest #19:
score: 5
Accepted
time: 681ms
memory: 11212kb
Pretest #20:
score: 5
Accepted
time: 692ms
memory: 19732kb
Final Tests
Test #1:
score: 5
Accepted
time: 1ms
memory: 3564kb
Test #2:
score: 5
Accepted
time: 1ms
memory: 3668kb
Test #3:
score: 5
Accepted
time: 1ms
memory: 3576kb
Test #4:
score: 5
Accepted
time: 1ms
memory: 3564kb
Test #5:
score: 5
Accepted
time: 1ms
memory: 3628kb
Test #6:
score: 5
Accepted
time: 1ms
memory: 3572kb
Test #7:
score: 5
Accepted
time: 1ms
memory: 3572kb
Test #8:
score: 5
Accepted
time: 1ms
memory: 3616kb
Test #9:
score: 5
Accepted
time: 20ms
memory: 3640kb
Test #10:
score: 5
Accepted
time: 20ms
memory: 3580kb
Test #11:
score: 5
Accepted
time: 579ms
memory: 10240kb
Test #12:
score: 5
Accepted
time: 579ms
memory: 12020kb
Test #13:
score: 5
Accepted
time: 3ms
memory: 3932kb
Test #14:
score: 5
Accepted
time: 6ms
memory: 3796kb
Test #15:
score: 5
Accepted
time: 101ms
memory: 3644kb
Test #16:
score: 5
Accepted
time: 109ms
memory: 3732kb
Test #17:
score: 5
Accepted
time: 57ms
memory: 3872kb
Test #18:
score: 5
Accepted
time: 55ms
memory: 4736kb
Test #19:
score: 5
Accepted
time: 663ms
memory: 11396kb
Test #20:
score: 5
Accepted
time: 708ms
memory: 19636kb
Extra Test:
score: 0
Extra Test Passed