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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 |
---|---|---|---|---|---|---|---|---|---|
#611045 | #7954. Special Numbers | rgnerdplayer# | WA | 0ms | 3836kb | C++20 | 3.6kb | 2024-10-04 19:02:37 | 2024-10-04 19:02:37 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
using ll = long long;
#define SZ(v) (ll)((v).size())
#define pb emplace_back
#define AI(i) begin(i),end(i)
#define X first
#define Y second
constexpr int P = 1e9 + 7;
void inc(int &a, int b) {
a += b;
if (a >= P) {
a -= P;
}
}
mt19937 rng(58);
int main(){
cin.tie(nullptr)->sync_with_stdio(false);
auto solve = [&]() {
i64 k;
cin >> k;
auto read = [&]() {
string s;
cin >> s;
reverse(s.begin(), s.end());
vector<int> a(s.size());
for (int i = 0; i < s.size(); i++) {
a[i] = s[i] - '0';
}
return a;
};
auto L = read();
auto R = read();
L[0]--;
for (int i = 0; i < L.size(); i++) {
if (L[i] < 0) {
assert(i + 1 != L.size());
L[i] += 10;
L[i + 1]--;
} else {
break;
}
}
while (L.size() > 1 && L.back() == 0) {
L.pop_back();
}
vector<int> primes, pows;
for (int p : {2, 3, 5, 7}) {
if (k % p != 0) {
continue;
}
primes.push_back(p);
pows.push_back(0);
while (k % p == 0) {
k /= p;
pows.back()++;
}
}
if (k != 1) {
cout << "0\n";
return;
}
vector decomp(10, vector<int>(primes.size()));
for (int i = 1; i < 10; i++) {
int x = i;
for (int j = 0; j < primes.size(); j++) {
while (x % primes[j] == 0) {
decomp[i][j]++;
x /= primes[j];
}
decomp[i][j] = min(decomp[i][j], pows[j]);
}
}
auto add = [&](vector<int> a, vector<int> b) {
vector<int> c(primes.size());
for (int i = 0; i < primes.size(); i++) {
c[i] = min(pows[i], a[i] + b[i]);
}
return c;
};
auto work = [&](vector<int> R) {
vector dp(2, map<vector<int>, int>()), ndp = dp;
int ans = 0;
for (int dig = R.size() - 1; dig >= 0; dig--) {
ndp.assign(2, {});
for (int x : {0, 1}) {
for (auto [a, c] : dp[x]) {
{
bool y = x && R[dig] == 0;
int add = c;
for (int i = 0; i < dig; i++) {
add = 1LL * add * (y ? R[i] + 1 : 10) % P;
}
inc(ans, add);
}
for (int i = 1; i <= (x ? R[dig] : 9); i++) {
if (decomp[i].empty()) {
continue;
}
inc(ndp[x && i == R[dig]][add(a, decomp[i])], c);
}
}
}
for (int i = 1; i <= (dig + 1 == R.size() ? R[dig] : 9); i++) {
inc(ndp[dig + 1 == R.size() && i == R[dig]][decomp[i]], 1);
}
swap(dp, ndp);
}
for (int x : {0, 1}) {
inc(ans, dp[x][pows]);
}
return ans;
};
int cr = work(R), cl = work(L);
int ans = (cr + P - cl) % P;
cout << ans << '\n';
};
solve();
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3836kb
input:
5 1 20
output:
4
result:
ok single line: '4'
Test #2:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
5 50 100
output:
19
result:
ok single line: '19'
Test #3:
score: 0
Accepted
time: 0ms
memory: 3568kb
input:
15 11 19
output:
0
result:
ok single line: '0'
Test #4:
score: -100
Wrong Answer
time: 0ms
memory: 3620kb
input:
1 100 100000
output:
9991
result:
wrong answer 1st lines differ - expected: '99901', found: '9991'