QOJ.ac

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
#142638#6522. Digit ModeBUET_POTATOES#AC ✓256ms3580kbC++202.8kb2023-08-19 16:04:022023-08-19 16:04:04

Judging History

你现在查看的是最新测评结果

  • [2023-08-19 16:04:04]
  • 评测
  • 测评结果:AC
  • 用时:256ms
  • 内存:3580kb
  • [2023-08-19 16:04:02]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
using LL = long long;
using pll = pair<LL, LL>;
using pii = pair<LL, LL>;
const int N = 51, K = 10;
const LL mod = 1e9 + 7;
using Ti = int;
Ti freq[K];
Ti limits[K];
Ti invf[N];
Ti f[N];
Ti C(Ti n, Ti k){
    return (LL)f[n] * invf[k] % mod * invf[n - k] % mod;
}
Ti a[N], b[N], c[N];

void multiply(Ti l1, Ti l2, Ti n){
    memset(c, 0, sizeof c);
    for(Ti i = 0; i <= l1 && i <= n; i++){
        for(Ti j = 0; j <= l2 && i + j <= n; j++){
            c[i + j] = (c[i + j] + (LL)a[i] * b[j]) % mod;
        }
    }
}
Ti calc(Ti n){
    memset(a, 0, sizeof a);
    a[0] = 1;
    Ti cur = 0;
    for(Ti i = 0; i < K; i++){
        if(limits[i] == 0)continue;
        if(limits[i] < 0)return 0;
        for(Ti j = 0; j <= limits[i]; j++)b[j] = invf[j];
        multiply(cur, limits[i], n);
        cur = min(cur + limits[i], n);
        for(Ti j = 0; j <= cur; j++)a[j] = c[j];
    }
    return (LL)a[n] * f[n] % mod;
}

Ti solve(Ti n){
    Ti ans = 0;
    for(Ti mode = 1; mode < K; mode++){
        for(Ti cnt = 0; cnt <= n; cnt++){
            for(Ti j = 0; j < K; j++){
                limits[j] = cnt + freq[mode] - freq[j] - (j > mode);
            }
            limits[mode] = 0;
//            cout << n - cnt << " " << calc(n - cnt) << endl;
            ans = (ans + (LL)calc(n - cnt) * mode % mod * C(n, cnt)) % mod;

        }
//        cout << ans << "\n";
    }
    return ans;
}

void testcase(Ti cs){
    string s;
    cin >> s;
    Ti n = s.size();
    memset(freq, 0, sizeof freq);
    Ti ans = 0;
    //0 er hishab

    for(Ti i = 1; i < n; i++){
        for(Ti j = 1; j < K; j++){
            freq[j] = 1;
            ans = (ans + solve(n - i - 1)) % mod;
            freq[j] = 0;
        }
    }

//    cout << solve(1) << endl;
    //onno part
    for(Ti i = 0; i < n; i++){
        for(Ti j = (i == 0 ? 1 : 0); j < s[i] - '0'; j++){
            freq[j]++;
            ans = (ans + solve(n - i - 1)) % mod;
            freq[j]--;
        }
        freq[s[i] - '0']++;
    }


    Ti t = 0;
    for(Ti i = 0; i < K; i++)if(freq[i] >= freq[t])t = i;
    ans = (ans + t) % mod;
    cout << ans << "\n";


}

/*

*/
int bigmod(int a, int n){
    int ans = 1;
    while(n){
        if(n & 1)ans = (LL)ans * a % mod;
        n >>= 1;
        a = (LL) a * a % mod;
    }
    return ans;
}

void pre(){
    f[0] = 1;
    for(int i = 1; i < N; i++)f[i] = (LL)f[i - 1] * i % mod;
    invf[N - 1] = bigmod(f[N - 1], mod - 2);
    for(int i = N - 2; i >= 0; i--)invf[i] = (LL)invf[i + 1] * (i + 1) % mod;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    pre();
    int T;
    cin >> T;
    for(int i = 1; i <= T; i++){
        testcase(i);
    }
    return 0;
}


詳細信息

Test #1:

score: 100
Accepted
time: 2ms
memory: 3448kb

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: 3452kb

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: 3536kb

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: 0ms
memory: 3472kb

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: 3ms
memory: 3456kb

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: 0ms
memory: 3524kb

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: 3516kb

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: 14ms
memory: 3452kb

input:

3
5014252832385738
8762796162648653
919997886706385

output:

892033338
297722019
462512414

result:

ok 3 number(s): "892033338 297722019 462512414"

Test #9:

score: 0
Accepted
time: 34ms
memory: 3564kb

input:

2
775701797726112292362823101
75927988177061355614

output:

371275551
566830847

result:

ok 2 number(s): "371275551 566830847"

Test #10:

score: 0
Accepted
time: 193ms
memory: 3520kb

input:

1
65760982925996012426370962570581226245366145016666

output:

661063035

result:

ok 1 number(s): "661063035"

Test #11:

score: 0
Accepted
time: 204ms
memory: 3516kb

input:

1
62597468169905757754175023836706426691470692832490

output:

9983261

result:

ok 1 number(s): "9983261"

Test #12:

score: 0
Accepted
time: 204ms
memory: 3472kb

input:

1
78912847369504885593964702297317051208901751786824

output:

817123221

result:

ok 1 number(s): "817123221"

Test #13:

score: 0
Accepted
time: 256ms
memory: 3464kb

input:

1
99999999999999999999999999999999999999999999999999

output:

25251932

result:

ok 1 number(s): "25251932"

Test #14:

score: 0
Accepted
time: 176ms
memory: 3460kb

input:

1
999999999999999999999999999999999999999999999

output:

439421821

result:

ok 1 number(s): "439421821"

Test #15:

score: 0
Accepted
time: 117ms
memory: 3520kb

input:

1
9999999999999999999999999999999999999999

output:

387537647

result:

ok 1 number(s): "387537647"

Test #16:

score: 0
Accepted
time: 255ms
memory: 3492kb

input:

1
99999999999999999999999998889999898988888889998888

output:

909431898

result:

ok 1 number(s): "909431898"

Test #17:

score: 0
Accepted
time: 255ms
memory: 3456kb

input:

1
99999999999999999999999998989899988889989889999888

output:

289727470

result:

ok 1 number(s): "289727470"

Test #18:

score: 0
Accepted
time: 255ms
memory: 3460kb

input:

1
99999999999999999999999998998988898888898889898999

output:

962896416

result:

ok 1 number(s): "962896416"

Test #19:

score: 0
Accepted
time: 116ms
memory: 3520kb

input:

1
9999999999999999999989988898888989888899

output:

995903330

result:

ok 1 number(s): "995903330"

Test #20:

score: 0
Accepted
time: 116ms
memory: 3580kb

input:

1
9999999999999999999989999889889998998898

output:

385460258

result:

ok 1 number(s): "385460258"

Test #21:

score: 0
Accepted
time: 256ms
memory: 3564kb

input:

1
99999999999999999999999999999999999999999999999999

output:

25251932

result:

ok 1 number(s): "25251932"