QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#275321 | #6522. Digit Mode | ucup-team1321# | AC ✓ | 233ms | 3856kb | C++23 | 2.9kb | 2023-12-04 16:42:46 | 2023-12-04 16:42:46 |
Judging History
answer
#include<iostream>
#include<cstdio>
#include<vector>
#include<algorithm>
using namespace std;
const int N=55;
const int MOD=1000000007;
int qpow(int a,int b)
{
int res=1;
while(b)
{
if(b&1) res=(long long)res*a%MOD;
a=(long long)a*a%MOD,b>>=1;
}
return res;
}
int getinv(int x)
{
return qpow(x,MOD-2);
}
int fac[N],ifac[N];
void init(int n=50)
{
fac[0]=1;
for(int i=1;i<=n;i++)
fac[i]=(long long)fac[i-1]*i%MOD;
ifac[n]=getinv(fac[n]);
for(int i=n;i>=1;i--)
ifac[i-1]=(long long)ifac[i]*i%MOD;
return;
}
int a[N];
int s[N];
int n;
int f[10][N];
int calc(int p)
{
int cnt[10]={};
for(int i=1;i<=p;i++)
cnt[s[i]]++;
for(int i=1;i<=p&&s[i]==0;i++)
cnt[s[i]]--;
if(p==n)
{
int mx=*max_element(cnt,cnt+9+1);
if(mx==0) return 0;
for(int i=9;i>=0;i--)
if(cnt[i]==mx) return i;
return 0;
}
int res=0;
for(int m=1;m<=9;m++)
{
for(int c=0;c<=n-p;c++)
{
int ret=n-p-c;
bool flag=true;
vector<int>v;
for(int i=0;i<=9;i++)
if(i!=m)
{
int lim=c+cnt[m]-(i>m)-cnt[i];
v.emplace_back(i);
if(lim<0)
{
flag=false;
break;
}
}
if(!flag) continue;
for(int i=0;i<=9;i++)
for(int j=0;j<=ret;j++)
f[i][j]=0;
f[0][0]=1;
for(int i=1;i<=9;i++)
{
int lim=c+cnt[m]-(v[i-1]>m)-cnt[v[i-1]];
for(int j=0;j<=ret;j++)
if(f[i-1][j])
for(int k=0;k<=lim&&j+k<=ret;k++)
f[i][j+k]=(f[i][j+k]+(long long)f[i-1][j]*ifac[k])%MOD;
}
res=(res+(long long)f[9][ret]*ifac[c]%MOD*fac[n-p]%MOD*m)%MOD;
}
}
return res;
}
void solve()
{
string str;
cin>>str;
n=str.size();
for(int i=1;i<=n;i++)
a[i]=str[i-1]-'0';
int ans=0;
for(int i=1;i<=n;i++)
{
if(i>=2)
{
for(int j=1;j<=9;j++)
{
s[i]=j;
ans=(ans+calc(i))%MOD;
}
}
s[i]=0;
}
for(int i=1;i<=n;i++)
{
for(int j=(i==1?1:0);j<a[i];j++)
{
s[i]=j;
ans=(ans+calc(i))%MOD;
}
s[i]=a[i];
}
ans=(ans+calc(n))%MOD;
cout<<ans<<"\n";
return;
}
int main()
{
ios::sync_with_stdio(false);
cin.tie(nullptr),cout.tie(nullptr);
init();
int T;
cin>>T;
while(T--)
solve();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3572kb
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: 1ms
memory: 3628kb
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: 0ms
memory: 3624kb
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: 2ms
memory: 3664kb
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: 3840kb
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: 3ms
memory: 3504kb
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: 4ms
memory: 3556kb
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: 15ms
memory: 3620kb
input:
3 5014252832385738 8762796162648653 919997886706385
output:
892033338 297722019 462512414
result:
ok 3 number(s): "892033338 297722019 462512414"
Test #9:
score: 0
Accepted
time: 35ms
memory: 3844kb
input:
2 775701797726112292362823101 75927988177061355614
output:
371275551 566830847
result:
ok 2 number(s): "371275551 566830847"
Test #10:
score: 0
Accepted
time: 204ms
memory: 3564kb
input:
1 65760982925996012426370962570581226245366145016666
output:
661063035
result:
ok 1 number(s): "661063035"
Test #11:
score: 0
Accepted
time: 209ms
memory: 3856kb
input:
1 62597468169905757754175023836706426691470692832490
output:
9983261
result:
ok 1 number(s): "9983261"
Test #12:
score: 0
Accepted
time: 212ms
memory: 3620kb
input:
1 78912847369504885593964702297317051208901751786824
output:
817123221
result:
ok 1 number(s): "817123221"
Test #13:
score: 0
Accepted
time: 233ms
memory: 3628kb
input:
1 99999999999999999999999999999999999999999999999999
output:
25251932
result:
ok 1 number(s): "25251932"
Test #14:
score: 0
Accepted
time: 160ms
memory: 3820kb
input:
1 999999999999999999999999999999999999999999999
output:
439421821
result:
ok 1 number(s): "439421821"
Test #15:
score: 0
Accepted
time: 106ms
memory: 3844kb
input:
1 9999999999999999999999999999999999999999
output:
387537647
result:
ok 1 number(s): "387537647"
Test #16:
score: 0
Accepted
time: 232ms
memory: 3500kb
input:
1 99999999999999999999999998889999898988888889998888
output:
909431898
result:
ok 1 number(s): "909431898"
Test #17:
score: 0
Accepted
time: 228ms
memory: 3624kb
input:
1 99999999999999999999999998989899988889989889999888
output:
289727470
result:
ok 1 number(s): "289727470"
Test #18:
score: 0
Accepted
time: 233ms
memory: 3600kb
input:
1 99999999999999999999999998998988898888898889898999
output:
962896416
result:
ok 1 number(s): "962896416"
Test #19:
score: 0
Accepted
time: 116ms
memory: 3848kb
input:
1 9999999999999999999989988898888989888899
output:
995903330
result:
ok 1 number(s): "995903330"
Test #20:
score: 0
Accepted
time: 107ms
memory: 3560kb
input:
1 9999999999999999999989999889889998998898
output:
385460258
result:
ok 1 number(s): "385460258"
Test #21:
score: 0
Accepted
time: 228ms
memory: 3848kb
input:
1 99999999999999999999999999999999999999999999999999
output:
25251932
result:
ok 1 number(s): "25251932"