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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#123148 | #6522. Digit Mode | lhzawa | AC ✓ | 217ms | 4292kb | C++14 | 2.6kb | 2023-07-11 19:50:19 | 2023-07-11 19:50:22 |
Judging History
answer
// lhzawa(https://www.cnblogs.com/lhzawa/)
// Problem: A. Digit Mode
// Contest: QOJ - The 2019 ICPC China Shaanxi Provincial Programming Contest
// URL: https://qoj.ac/contest/1285/problem/6522
// Memory Limit: 256 MB
// Time Limit: 2000 ms
//
// Powered by CP Editor (https://cpeditor.org)
#include<bits/stdc++.h>
using namespace std;
const int N = 50 + 5;
const long long mod = 1e9 + 7;
long long fac[N], inv[N];
char s[N];
int c[N];
long long f[12][N][N], g[12][N][N];
int main() {
fac[0] = inv[0] = 1ll;
for (int i = 1; i < N; i++) {
fac[i] = 1ll * fac[i - 1] * i % mod;
}
function<long long (long long)> iv = [](long long a) -> long long {
long long val = 1, b = mod - 2;
for (; b; b >>= 1, a = a * a % mod) {
if (b & 1) {
val = val * a % mod;
}
}
return val;
};
inv[N - 1] = iv(fac[N - 1]);
for (int i = N - 2; i >= 1; i--) {
inv[i] = 1ll * inv[i + 1] * (i + 1) % mod;
}
function<void ()> solve = []() -> void {
scanf("%s", s);
int n = strlen(s);
memset(c, 0, sizeof(c));
function<long long (int)> _solve = [&n](int m) -> long long {
memset(f, 0, sizeof(f)), memset(g, 0, sizeof(g));
f[0][0][0] = 1;
for (int x = 0; x <= 9; x++){
for (int i = 0; i <= m; i++) {
for (int j = 0; j <= n; j++) {
if (f[x][i][j]) {
for (int k = 0, zxx = c[x]; i + k <= m; k++, zxx++) {
long long sval = f[x][i][j] * inv[k] % mod;
f[x + 1][i + k][max(j, zxx)] = (f[x + 1][i + k][max(j, zxx)] + sval) % mod;
if (zxx >= j) {
g[x + 1][i + k][zxx] = (g[x + 1][i + k][zxx] + 1ll * sval * x % mod) % mod;
}
}
}
}
}
for (int i = 0; i <= m; i++) {
for (int j = 0; j <= n; j++) {
if (g[x][i][j]) {
for (int k = 0, zxx = c[x]; i + k <= m && zxx < j; k++, zxx++) {
g[x + 1][i + k][j] = (g[x + 1][i + k][j] + 1ll * g[x][i][j] * inv[k] % mod) % mod;
}
}
}
}
}
long long val = 0;
for (int j = 0; j <= n; j++) {
val = (val + g[10][m][j]) % mod;
}
return val * fac[m] % mod;
};
long long val = 0;
for (int i = 1; i < n; i++) {
for (int j = 1; j <= 9; j++) {
c[j]++;
val = (val + _solve(i - 1)) % mod;
c[j]--;
}
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < (int)(s[i] - '0'); j++) {
if (i == 0 && j == 0) {
continue;
}
c[j]++;
val = (val + _solve(n - i - 1)) % mod;
c[j]--;
}
c[(int)(s[i] - '0')]++;
}
val = (val + _solve(0)) % mod;
printf("%lld\n", val);
};
int _;
scanf("%d", &_);
for (; _; _--) {
solve();
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 4ms
memory: 4208kb
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: 5ms
memory: 4196kb
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: 6ms
memory: 4256kb
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: 6ms
memory: 4212kb
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: 7ms
memory: 4256kb
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: 6ms
memory: 4208kb
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: 7ms
memory: 4192kb
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: 9ms
memory: 4256kb
input:
3 5014252832385738 8762796162648653 919997886706385
output:
892033338 297722019 462512414
result:
ok 3 number(s): "892033338 297722019 462512414"
Test #9:
score: 0
Accepted
time: 24ms
memory: 4252kb
input:
2 775701797726112292362823101 75927988177061355614
output:
371275551 566830847
result:
ok 2 number(s): "371275551 566830847"
Test #10:
score: 0
Accepted
time: 168ms
memory: 4204kb
input:
1 65760982925996012426370962570581226245366145016666
output:
661063035
result:
ok 1 number(s): "661063035"
Test #11:
score: 0
Accepted
time: 168ms
memory: 4212kb
input:
1 62597468169905757754175023836706426691470692832490
output:
9983261
result:
ok 1 number(s): "9983261"
Test #12:
score: 0
Accepted
time: 173ms
memory: 4252kb
input:
1 78912847369504885593964702297317051208901751786824
output:
817123221
result:
ok 1 number(s): "817123221"
Test #13:
score: 0
Accepted
time: 217ms
memory: 4204kb
input:
1 99999999999999999999999999999999999999999999999999
output:
25251932
result:
ok 1 number(s): "25251932"
Test #14:
score: 0
Accepted
time: 146ms
memory: 4136kb
input:
1 999999999999999999999999999999999999999999999
output:
439421821
result:
ok 1 number(s): "439421821"
Test #15:
score: 0
Accepted
time: 92ms
memory: 4292kb
input:
1 9999999999999999999999999999999999999999
output:
387537647
result:
ok 1 number(s): "387537647"
Test #16:
score: 0
Accepted
time: 215ms
memory: 4196kb
input:
1 99999999999999999999999998889999898988888889998888
output:
909431898
result:
ok 1 number(s): "909431898"
Test #17:
score: 0
Accepted
time: 214ms
memory: 4192kb
input:
1 99999999999999999999999998989899988889989889999888
output:
289727470
result:
ok 1 number(s): "289727470"
Test #18:
score: 0
Accepted
time: 213ms
memory: 4208kb
input:
1 99999999999999999999999998998988898888898889898999
output:
962896416
result:
ok 1 number(s): "962896416"
Test #19:
score: 0
Accepted
time: 95ms
memory: 4216kb
input:
1 9999999999999999999989988898888989888899
output:
995903330
result:
ok 1 number(s): "995903330"
Test #20:
score: 0
Accepted
time: 92ms
memory: 4204kb
input:
1 9999999999999999999989999889889998998898
output:
385460258
result:
ok 1 number(s): "385460258"
Test #21:
score: 0
Accepted
time: 214ms
memory: 4216kb
input:
1 99999999999999999999999999999999999999999999999999
output:
25251932
result:
ok 1 number(s): "25251932"