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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#386526 | #7782. Ursa Minor | A_programmer | WA | 130ms | 10048kb | C++17 | 4.4kb | 2024-04-11 17:58:46 | 2024-04-11 17:58:47 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll mod = 1e9 + 7;
const ll Base = 10;
const int B = 455;
const int maxn = 2e5 + 5;
int a[maxn], b[maxn], f[maxn][18], lg[maxn];
inline int gcd(int a, int b) { return b ? gcd(b, a % b) : a; }
int query(int l, int r)
{
int k = lg[r - l + 1];
return gcd(f[l][k], f[r - (1 << k) + 1][k]);
}
ll fpow(ll a, ll b)
{
ll ans = 1;
while (b)
{
if (b & 1) ans = ans * a % mod;
a = a * a % mod;
b >>= 1;
}
return ans;
}
ll mi[maxn], inv[maxn], pre[maxn], iBase;
int bs, bn, bl[B], br[B], bel[maxn];
struct ds1 // O(1) query to O(sqrt(n)) update a_i * x^i
{
ll c[maxn], tag[maxn];
void add(int pos, ll x)
{
for (int i = pos; i <= br[bel[pos]]; i++) (c[i] += x) %= mod;
for (int i = bel[pos] + 1; i <= bn; i++) (tag[i] += x) %= mod;
}
ll sum(int pos) { return (c[pos] + tag[bel[pos]]) % mod; }
}ds1;
struct ds2 // O(sqrt(n)) query to O(1) update a_i * x^(i % k)
{
ll c[maxn], sum[10005];
ll d[maxn], sud[10005];
void add(int pos, ll x) { (c[pos] += x) %= mod; (sum[bel[pos]] += x) %= mod; }
void addD(int pos, ll x) { (d[pos] += x) %= mod; (sud[bel[pos]] += x) %= mod; }
ll sumP(int pos)
{
ll ans = 0;
for (int i = 1; i < bel[pos]; i++) (ans += sum[i]) %= mod;
for (int i = bl[bel[pos]]; i <= pos; i++) (ans += c[i]) %= mod;
return ans;
}
ll sumD(int pos)
{
ll ans = 0;
for (int i = 1; i < bel[pos]; i++) (ans += sud[i]) %= mod;
for (int i = bl[bel[pos]]; i <= pos; i++) (ans += d[i]) %= mod;
return ans;
}
}ds2[B];
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
int n, m, q;
cin >> n >> m >> q;
mi[0] = inv[0] = pre[0] = 1; iBase = fpow(Base, mod - 2);
for (int i = 1; i <= n; i++) mi[i] = mi[i - 1] * Base % mod, pre[i] = (pre[i - 1] + mi[i]) % mod;
for (int i = 1; i <= n; i++) inv[i] = inv[i - 1] * iBase % mod;
for (int i = 1; i <= n; i++) cin >> a[i];
for (int i = 1, k = 0; i <= m; i++)
{
cin >> b[i], f[i][0] = b[i];
lg[i] = k;
if (i == (1 << (k + 1))) lg[i] = ++k;
}
for (int j = 1; j <= 17; j++)
for (int i = 1; i + (1 << j) - 1 <= m; i++)
f[i][j] = gcd(f[i][j - 1], f[i + (1 << (j - 1))][j - 1]);
bs = sqrt(n);
for (int i = 1; i <= n; i += bs)
bl[++bn] = i, br[bn] = i + bs - 1;
br[bn] = n;
for (int i = 1; i <= bn; i++)
for (int j = bl[i]; j <= br[i]; j++) bel[j] = i;
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= bs; j++)
{
ds2[j].add(i, a[i] * mi[i % j] % mod);
if (i % j == 0) ds2[j].addD(i, a[i]);
}
ds1.add(i, a[i] * mi[i] % mod);
}
while (q--)
{
char s[4];
cin >> s;
if (s[0] == 'U')
{
int pos;
ll v;
cin >> pos >> v;
v = (v + mod - a[pos]) % mod;
for (int i = 1; i <= bs; i++)
{
ds2[i].add(pos, v * mi[pos % i] % mod);
if (pos % i == 0) ds2[i].addD(pos, v);
}
ds1.add(pos, v * mi[pos] % mod);
(a[pos] += v) %= mod;
}
else
{
int l, r, s, t;
cin >> l >> r >> s >> t;
int k = gcd(r - l + 1, query(s, t));
ll hsh = 0, hs2 = 0;
if (k <= bs)
{
hsh = ds2[k].sumP(r) - ds2[k].sumP(l - 1);
hs2 = ds2[k].sumD(r) - ds2[k].sumD(l - 1);
if (hsh < 0) hsh += mod;
if (hs2 < 0) hs2 += mod;
}
else
{
for (int i = l; i <= r; i += k) (hs2 += a[i]) %= mod;
for (int i = l / k; i <= r / k; i++)
{
int L = i * k, R = L + k - 1;
L = max(L, l), R = min(R, r);
if (L > R) continue;
ll res = (ds1.sum(R) + mod - ds1.sum(L - 1)) * inv[i * k] % mod;
(hsh += res) %= mod;
}
}
(hs2 *= pre[k - 1]) %= mod;
cout << (hsh == hs2 ? "Yes\n" : "No\n");
}
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 9816kb
input:
6 4 5 1 1 4 5 1 4 3 3 2 4 Q 1 5 1 2 Q 2 5 3 4 U 5 2 Q 1 6 1 2 Q 2 5 3 4
output:
Yes No No Yes
result:
ok 4 tokens
Test #2:
score: 0
Accepted
time: 1ms
memory: 7756kb
input:
1 1 1 0 1 Q 1 1 1 1
output:
Yes
result:
ok "Yes"
Test #3:
score: -100
Wrong Answer
time: 130ms
memory: 10048kb
input:
2000 2000 200000 1 1 2 0 0 2 0 2 0 0 0 0 0 2 2 1 2 0 0 2 2 2 1 0 1 2 1 2 0 0 1 1 1 2 0 0 2 2 2 2 0 2 0 0 2 1 2 0 0 1 2 2 1 0 2 0 0 0 1 2 2 1 2 2 0 0 1 1 1 0 0 2 0 0 1 1 0 2 2 2 1 0 0 1 0 1 2 2 2 1 1 2 2 1 2 1 0 2 2 3 1 3 2 3 1 0 1 2 0 1 1 1 0 2 2 3 2 0 3 2 3 3 1 2 3 1 2 0 1 0 3 1 0 0 2 0 1 2 1 3 2 2...
output:
Yes Yes No Yes Yes No No No Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes No Yes Yes No No No No No Yes No No No Yes Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes No Yes Yes Yes No No Yes No Yes No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes No...
result:
wrong answer 1901st words differ - expected: 'No', found: 'Yes'