QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#696896 | #9155. 集合 | makrav | 100 ✓ | 1233ms | 54664kb | C++20 | 3.9kb | 2024-11-01 06:03:51 | 2024-11-01 06:03:52 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define int ll
mt19937 rnd(time(NULL));
struct Modular {
int mod;
Modular() = default;
Modular(int md) {
mod = md;
}
int sum(int x, int y) { return (x + y >= mod ? x + y - mod : x + y); }
int diff(int x, int y) { return (x - y < 0 ? x - y + mod : x - y); }
int mul(int x, int y) { return (x * y) % mod; }
int binpow(int x, int y) {
int ans = 1, pw = x;
while (y) {
if (y & 1) { ans = mul(ans, pw); }
pw = mul(pw, pw);
y >>= 1;
}
return ans;
}
int rev(int x) { return binpow(x, mod - 2); }
int divide(int x, int y) { return mul(x, rev(y)); }
};
int sma[600010], smb[600010];
struct Hash {
int n, m, mod;
Modular M;
vector<int> a, b, rval;
int ha = 1, hb = 1, wsa, wsb;
Hash() = default;
Hash(int md, int n_, int m_, vector<int> a_, vector<int> b_) {
n=n_;m=m_;mod=md;a=a_;b=b_;
M = Modular(mod);
rval.assign(n, 0);
for (int i = 0; i < n; i++) rval[i] = rnd() % mod;
}
void add(int pos) {
wsa = ha;
wsb = hb;
for (int j = 3 * pos; j < 3 * pos + 3; j++) {
ha = M.divide(ha, max(sma[a[j]], 1ll));
hb = M.divide(hb, max(smb[b[j]], 1ll));
sma[a[j]] = M.sum(sma[a[j]], rval[pos]);
smb[b[j]] = M.sum(smb[b[j]], rval[pos]);
ha = M.mul(ha, max(sma[a[j]], 1ll));
hb = M.mul(hb, max(smb[b[j]], 1ll));
}
}
void undo(int pos) {
ha = wsa; hb = wsb;
for (int j = 3 * pos; j < 3 * pos + 3; j++) {
sma[a[j]] = M.diff(sma[a[j]], rval[pos]);
smb[b[j]] = M.diff(smb[b[j]], rval[pos]);
}
}
void del(int pos) {
for (int j = 3 * pos; j < 3 * pos + 3; j++) {
ha = M.divide(ha, max(sma[a[j]], 1ll));
hb = M.divide(hb, max(smb[b[j]], 1ll));
sma[a[j]] = M.diff(sma[a[j]], rval[pos]);
smb[b[j]] = M.diff(smb[b[j]], rval[pos]);
ha = M.mul(ha, max(sma[a[j]], 1ll));
hb = M.mul(hb, max(smb[b[j]], 1ll));
}
}
bool check() {
return ha == hb;
}
};
signed main() {
#ifdef LOCAL
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
#endif
cin.tie(nullptr)->sync_with_stdio(false);
int n, m, q; cin >> n >> m >> q;
vector<int> a(3 * n), b(3 * n);
for (int i = 0; i < 3 * n; i++) {cin >> a[i]; a[i]--; }
for (int &el : b) {cin >> el; el--;}
int md1 = 1e9 + 7, md2 = 1e9 + 9;
Hash h1(md1, n, m, a, b);
int curr = -1;
vector<int> maxr(n);
for (int l = 0; l < n; l++) {
while (curr + 1 < n) {
h1.add(curr + 1);
if (h1.check()) {
curr++;
continue;
} else {
h1.undo(curr + 1);
break;
}
}
maxr[l] = curr;
if (curr >= l) {
h1.del(l);
}
else {
curr = l;
}
}
h1 = Hash(md2, n, m, a, b);
for (int l = 0; l < n; l++) {
while (curr + 1 < n) {
h1.add(curr + 1);
if (h1.check()) {
curr++;
continue;
} else {
h1.undo(curr + 1);
break;
}
}
maxr[l] = min(maxr[l], curr);
if (curr >= l) {
h1.del(l);
}
else {
curr = l;
}
}
while (q--) {
int l, r; cin >> l >> r;
l--; r--;
cout << (maxr[l] >= r ? "Yes\n" : "No\n");
}
}
Details
Pretests
Pretest #1:
score: 5
Accepted
time: 1ms
memory: 3744kb
Pretest #2:
score: 5
Accepted
time: 1ms
memory: 3636kb
Pretest #3:
score: 5
Accepted
time: 1ms
memory: 3628kb
Pretest #4:
score: 5
Accepted
time: 1ms
memory: 3708kb
Pretest #5:
score: 5
Accepted
time: 1ms
memory: 3844kb
Pretest #6:
score: 5
Accepted
time: 1ms
memory: 3640kb
Pretest #7:
score: 5
Accepted
time: 2ms
memory: 3748kb
Pretest #8:
score: 5
Accepted
time: 2ms
memory: 3976kb
Pretest #9:
score: 5
Accepted
time: 20ms
memory: 3884kb
Pretest #10:
score: 5
Accepted
time: 20ms
memory: 3724kb
Pretest #11:
score: 5
Accepted
time: 1070ms
memory: 45448kb
Pretest #12:
score: 5
Accepted
time: 1059ms
memory: 45408kb
Pretest #13:
score: 5
Accepted
time: 14ms
memory: 3792kb
Pretest #14:
score: 5
Accepted
time: 7ms
memory: 3948kb
Pretest #15:
score: 5
Accepted
time: 104ms
memory: 4032kb
Pretest #16:
score: 5
Accepted
time: 108ms
memory: 3884kb
Pretest #17:
score: 5
Accepted
time: 102ms
memory: 7508kb
Pretest #18:
score: 5
Accepted
time: 107ms
memory: 8512kb
Pretest #19:
score: 5
Accepted
time: 1174ms
memory: 45480kb
Pretest #20:
score: 5
Accepted
time: 1217ms
memory: 54620kb
Final Tests
Test #1:
score: 5
Accepted
time: 1ms
memory: 3636kb
Test #2:
score: 5
Accepted
time: 1ms
memory: 3632kb
Test #3:
score: 5
Accepted
time: 1ms
memory: 3708kb
Test #4:
score: 5
Accepted
time: 1ms
memory: 3700kb
Test #5:
score: 5
Accepted
time: 1ms
memory: 3752kb
Test #6:
score: 5
Accepted
time: 1ms
memory: 3628kb
Test #7:
score: 5
Accepted
time: 1ms
memory: 3740kb
Test #8:
score: 5
Accepted
time: 1ms
memory: 3720kb
Test #9:
score: 5
Accepted
time: 16ms
memory: 3728kb
Test #10:
score: 5
Accepted
time: 20ms
memory: 3980kb
Test #11:
score: 5
Accepted
time: 1066ms
memory: 45508kb
Test #12:
score: 5
Accepted
time: 1071ms
memory: 45420kb
Test #13:
score: 5
Accepted
time: 11ms
memory: 3872kb
Test #14:
score: 5
Accepted
time: 11ms
memory: 3932kb
Test #15:
score: 5
Accepted
time: 103ms
memory: 3876kb
Test #16:
score: 5
Accepted
time: 111ms
memory: 3924kb
Test #17:
score: 5
Accepted
time: 107ms
memory: 7496kb
Test #18:
score: 5
Accepted
time: 103ms
memory: 8368kb
Test #19:
score: 5
Accepted
time: 1167ms
memory: 45492kb
Test #20:
score: 5
Accepted
time: 1233ms
memory: 54664kb
Extra Test:
score: 0
Extra Test Passed