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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 |
---|---|---|---|---|---|---|---|---|---|
#110694 | #6522. Digit Mode | hos_lyric | AC ✓ | 178ms | 4180kb | C++14 | 6.3kb | 2023-06-03 12:41:03 | 2023-06-03 12:41:07 |
Judging History
answer
#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using Int = long long;
template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
////////////////////////////////////////////////////////////////////////////////
template <unsigned M_> struct ModInt {
static constexpr unsigned M = M_;
unsigned x;
constexpr ModInt() : x(0U) {}
constexpr ModInt(unsigned x_) : x(x_ % M) {}
constexpr ModInt(unsigned long long x_) : x(x_ % M) {}
constexpr ModInt(int x_) : x(((x_ %= static_cast<int>(M)) < 0) ? (x_ + static_cast<int>(M)) : x_) {}
constexpr ModInt(long long x_) : x(((x_ %= static_cast<long long>(M)) < 0) ? (x_ + static_cast<long long>(M)) : x_) {}
ModInt &operator+=(const ModInt &a) { x = ((x += a.x) >= M) ? (x - M) : x; return *this; }
ModInt &operator-=(const ModInt &a) { x = ((x -= a.x) >= M) ? (x + M) : x; return *this; }
ModInt &operator*=(const ModInt &a) { x = (static_cast<unsigned long long>(x) * a.x) % M; return *this; }
ModInt &operator/=(const ModInt &a) { return (*this *= a.inv()); }
ModInt pow(long long e) const {
if (e < 0) return inv().pow(-e);
ModInt a = *this, b = 1U; for (; e; e >>= 1) { if (e & 1) b *= a; a *= a; } return b;
}
ModInt inv() const {
unsigned a = M, b = x; int y = 0, z = 1;
for (; b; ) { const unsigned q = a / b; const unsigned c = a - q * b; a = b; b = c; const int w = y - static_cast<int>(q) * z; y = z; z = w; }
assert(a == 1U); return ModInt(y);
}
ModInt operator+() const { return *this; }
ModInt operator-() const { ModInt a; a.x = x ? (M - x) : 0U; return a; }
ModInt operator+(const ModInt &a) const { return (ModInt(*this) += a); }
ModInt operator-(const ModInt &a) const { return (ModInt(*this) -= a); }
ModInt operator*(const ModInt &a) const { return (ModInt(*this) *= a); }
ModInt operator/(const ModInt &a) const { return (ModInt(*this) /= a); }
template <class T> friend ModInt operator+(T a, const ModInt &b) { return (ModInt(a) += b); }
template <class T> friend ModInt operator-(T a, const ModInt &b) { return (ModInt(a) -= b); }
template <class T> friend ModInt operator*(T a, const ModInt &b) { return (ModInt(a) *= b); }
template <class T> friend ModInt operator/(T a, const ModInt &b) { return (ModInt(a) /= b); }
explicit operator bool() const { return x; }
bool operator==(const ModInt &a) const { return (x == a.x); }
bool operator!=(const ModInt &a) const { return (x != a.x); }
friend std::ostream &operator<<(std::ostream &os, const ModInt &a) { return os << a.x; }
};
////////////////////////////////////////////////////////////////////////////////
constexpr unsigned MO = 1000000007;
using Mint = ModInt<MO>;
constexpr int LIM_INV = 1010;
Mint inv[LIM_INV], fac[LIM_INV], invFac[LIM_INV];
void prepare() {
inv[1] = 1;
for (int i = 2; i < LIM_INV; ++i) {
inv[i] = -((Mint::M / i) * inv[Mint::M % i]);
}
fac[0] = invFac[0] = 1;
for (int i = 1; i < LIM_INV; ++i) {
fac[i] = fac[i - 1] * i;
invFac[i] = invFac[i - 1] * inv[i];
}
}
Mint binom(Int n, Int k) {
if (n < 0) {
if (k >= 0) {
return ((k & 1) ? -1 : +1) * binom(-n + k - 1, k);
} else if (n - k >= 0) {
return (((n - k) & 1) ? -1 : +1) * binom(-k - 1, n - k);
} else {
return 0;
}
} else {
if (0 <= k && k <= n) {
assert(n < LIM_INV);
return fac[n] * invFac[k] * invFac[n - k];
} else {
return 0;
}
}
}
int L;
char S[60];
int F[11];
Mint dp[11][60][60];
Mint DP[11][60][60];
Mint solve(int n) {
// cerr<<"solve "<<n<<"; ";pv(F,F+10);
for (int a = 0; a <= 10; ++a) {
for (int i = 0; i <= n; ++i) {
fill(dp[a][i], dp[a][i] + (L + 1), 0);
fill(DP[a][i], DP[a][i] + (L + 1), 0);
}
}
dp[0][0][0] = 1;
for (int a = 0; a < 10; ++a) {
for (int i = 0; i <= n; ++i) for (int j = 0; j <= L; ++j) if (dp[a][i][j]) {
for (int k = 0; i + k <= n; ++k) {
const Mint t = dp[a][i][j] * invFac[k];
const int jj = F[a] + k;
dp[a + 1][i + k][max(j, jj)] += t;
if (j <= jj) {
DP[a + 1][i + k][jj] += t * a;
}
}
}
for (int i = 0; i <= n; ++i) for (int j = 0; j <= L; ++j) if (DP[a][i][j]) {
for (int k = 0; i + k <= n && F[a] + k < j; ++k) {
DP[a + 1][i + k][j] += DP[a][i][j] * invFac[k];
}
}
}
Mint ret = 0;
for (int j = 0; j <= L; ++j) {
// cerr<<" j = "<<j<<": "<<DP[10][n][j]*fac[n]<<endl;
ret += DP[10][n][j];
}
ret *= fac[n];
// cerr<<" ret = "<<ret<<endl;
return ret;
}
int main() {
prepare();
for (int numCases; ~scanf("%d", &numCases); ) { for (int caseId = 1; caseId <= numCases; ++caseId) {
scanf("%s", S);
L = strlen(S);
memset(F, 0, sizeof(F));
Mint ans = 0;
for (int l = 1; l < L; ++l) {
for (int a = 1; a < 10; ++a) {
++F[a];
ans += solve(l - 1);
--F[a];
}
}
for (int i = 0; i < L; ++i) {
const int a = S[i] - '0';
for (int b = 0; b < a; ++b) {
if (i == 0 && b == 0) continue;
++F[b];
ans += solve(L - 1 - i);
--F[b];
}
++F[a];
}
ans += solve(0);
printf("%u\n", ans.x);
}
#ifndef LOCAL
break;
#endif
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 2ms
memory: 3680kb
input:
5 9 99 999 99999 999999
output:
45 615 6570 597600 5689830
result:
ok 5 number(s): "45 615 6570 597600 5689830"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3928kb
input:
34 7 48 8 76 1 97 7 5 7 7 2 89 9 4 84 46 6 73 86 78 5 3 8 9 31 24 78 7 11 45 2 65 88 6
output:
28 236 36 420 1 597 28 15 28 28 3 525 45 10 484 221 21 399 500 435 15 6 36 45 145 104 435 28 47 215 3 341 516 21
result:
ok 34 numbers
Test #3:
score: 0
Accepted
time: 2ms
memory: 3712kb
input:
16 935 888 429 370 499 881 285 162 178 948 205 858 573 249 773 615
output:
6009 5618 2456 2078 2905 5562 1603 887 993 6121 1174 5378 3333 1374 4724 3631
result:
ok 16 numbers
Test #4:
score: 0
Accepted
time: 1ms
memory: 3736kb
input:
12 1242 9985 6469 9310 4191 9497 3166 3495 9711 9698 4137 2257
output:
7292 63531 37910 58047 23987 59479 18076 19675 61184 61086 23672 12913
result:
ok 12 numbers
Test #5:
score: 0
Accepted
time: 2ms
memory: 3748kb
input:
10 61195 72739 10164 79164 57851 12326 29132 55992 67377 13873
output:
337575 408170 63792 450686 316513 70493 157773 305011 374163 77954
result:
ok 10 numbers
Test #6:
score: 0
Accepted
time: 1ms
memory: 3716kb
input:
8 529983 127270 421121 291729 461233 695056 365028 271160
output:
2744573 687141 2160067 1500426 2359204 3705475 1851172 1381981
result:
ok 8 numbers
Test #7:
score: 0
Accepted
time: 1ms
memory: 3764kb
input:
7 7934351 8474057 1287369 5845624 7796773 5805755 7349121
output:
42465725 45668947 6716401 30094426 41554096 29861098 38756757
result:
ok 7 numbers
Test #8:
score: 0
Accepted
time: 8ms
memory: 3732kb
input:
3 5014252832385738 8762796162648653 919997886706385
output:
892033338 297722019 462512414
result:
ok 3 number(s): "892033338 297722019 462512414"
Test #9:
score: 0
Accepted
time: 21ms
memory: 3916kb
input:
2 775701797726112292362823101 75927988177061355614
output:
371275551 566830847
result:
ok 2 number(s): "371275551 566830847"
Test #10:
score: 0
Accepted
time: 132ms
memory: 3932kb
input:
1 65760982925996012426370962570581226245366145016666
output:
661063035
result:
ok 1 number(s): "661063035"
Test #11:
score: 0
Accepted
time: 135ms
memory: 3996kb
input:
1 62597468169905757754175023836706426691470692832490
output:
9983261
result:
ok 1 number(s): "9983261"
Test #12:
score: 0
Accepted
time: 132ms
memory: 4000kb
input:
1 78912847369504885593964702297317051208901751786824
output:
817123221
result:
ok 1 number(s): "817123221"
Test #13:
score: 0
Accepted
time: 167ms
memory: 3916kb
input:
1 99999999999999999999999999999999999999999999999999
output:
25251932
result:
ok 1 number(s): "25251932"
Test #14:
score: 0
Accepted
time: 114ms
memory: 3932kb
input:
1 999999999999999999999999999999999999999999999
output:
439421821
result:
ok 1 number(s): "439421821"
Test #15:
score: 0
Accepted
time: 76ms
memory: 4088kb
input:
1 9999999999999999999999999999999999999999
output:
387537647
result:
ok 1 number(s): "387537647"
Test #16:
score: 0
Accepted
time: 169ms
memory: 4180kb
input:
1 99999999999999999999999998889999898988888889998888
output:
909431898
result:
ok 1 number(s): "909431898"
Test #17:
score: 0
Accepted
time: 178ms
memory: 3948kb
input:
1 99999999999999999999999998989899988889989889999888
output:
289727470
result:
ok 1 number(s): "289727470"
Test #18:
score: 0
Accepted
time: 171ms
memory: 4160kb
input:
1 99999999999999999999999998998988898888898889898999
output:
962896416
result:
ok 1 number(s): "962896416"
Test #19:
score: 0
Accepted
time: 74ms
memory: 4160kb
input:
1 9999999999999999999989988898888989888899
output:
995903330
result:
ok 1 number(s): "995903330"
Test #20:
score: 0
Accepted
time: 73ms
memory: 3896kb
input:
1 9999999999999999999989999889889998998898
output:
385460258
result:
ok 1 number(s): "385460258"
Test #21:
score: 0
Accepted
time: 176ms
memory: 3936kb
input:
1 99999999999999999999999999999999999999999999999999
output:
25251932
result:
ok 1 number(s): "25251932"