QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#233195#6410. Classical DP Problemiulia_morariuWA 183ms199312kbC++141.7kb2023-10-31 14:59:372023-10-31 14:59:37

Judging History

你现在查看的是最新测评结果

  • [2023-10-31 14:59:37]
  • 评测
  • 测评结果:WA
  • 用时:183ms
  • 内存:199312kb
  • [2023-10-31 14:59:37]
  • 提交

answer

#include <bits/stdc++.h>
#define Mod 998244353
#define int long long

using namespace std;

int k;
int din(vector <int> a){
    int n = a.size();
    int x = 0;
    int it = n - 1;
    if(n == k) x = 0;
    else x = a[k];

    int dp[n + 1][n + 1];
    for(int i = 0; i <= n; i++){
        for(int j = 0; j <= n; j++) dp[i][j] = 0;
    }

    dp[0][ x ] = 1;

    for(int i = 0; i < k; i++){
        for(int j = 0; j <= x; j++){
            // acoperim o cloana neimportanta
            dp[i + 1][j] += (a[i] - j) * dp[i][j] % Mod;
            dp[i + 1][j] %= Mod;
            // acoperim o coloana importanta
            if(j > 0){
                dp[i + 1][j - 1] += j * dp[i][j] % Mod;
                dp[i + 1][j - 1] %= Mod;
            }
        }
    }


    return dp[k][0];
}

signed  main(){
    cin.tie(0);ios::sync_with_stdio(0);

    int n; cin >> n;
    vector <int> v(n);
    for(int i = 0; i < n; i++) cin >> v[i];
    reverse(v.begin(), v.end());
    k = n;

    for(int i = 0; i < n; i++){
        if(v[i] < i + 1){
            k = i;
            break;
        }
    }

    cout << k << " ";


    int val1 = din(v);
    //cout << "val1 = "  << val1 << endl;

    vector<int> v1(n);
    for(int i = 0; i < n; i++) v1[i] = 0;
    for(int i = 0; i < n; i++){
        for(int j = 0; j < v[i]; j++){
            v1[j]++;
        }
    }
    //reverse(v1.begin(), v1.end());

    int val2 = din(v1);
    //cout << "val2 = " << val2 << endl;

    int fact = 1;
    for(int i = 2; i <= k; i++){
        fact *= i;
        fact %= Mod;
    }
    //cout << "fact = " << fact << endl;

    cout << val1 + val2 - fact << endl;



    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3640kb

input:

3
1 2 3

output:

2 6

result:

ok 2 number(s): "2 6"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3628kb

input:

1
1

output:

1 1

result:

ok 2 number(s): "1 1"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3584kb

input:

2
1 1

output:

1 2

result:

ok 2 number(s): "1 2"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3540kb

input:

2
2 2

output:

2 6

result:

ok 2 number(s): "2 6"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3616kb

input:

3
1 1 1

output:

1 3

result:

ok 2 number(s): "1 3"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

3
2 2 2

output:

2 9

result:

ok 2 number(s): "2 9"

Test #7:

score: 0
Accepted
time: 0ms
memory: 3644kb

input:

3
3 3 3

output:

3 48

result:

ok 2 number(s): "3 48"

Test #8:

score: 0
Accepted
time: 0ms
memory: 3640kb

input:

5
1 1 3 3 4

output:

3 47

result:

ok 2 number(s): "3 47"

Test #9:

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

input:

10
2 4 5 5 5 5 6 8 8 10

output:

5 864

result:

ok 2 number(s): "5 864"

Test #10:

score: 0
Accepted
time: 0ms
memory: 3552kb

input:

30
6 8 9 9 9 10 13 14 15 15 16 17 17 18 20 22 22 23 23 24 24 25 25 25 27 28 28 29 29 30

output:

17 986189864

result:

ok 2 number(s): "17 986189864"

Test #11:

score: 0
Accepted
time: 0ms
memory: 3728kb

input:

123
1 1 1 2 2 3 3 6 6 7 7 7 8 8 9 9 10 10 10 11 12 12 12 13 14 14 14 14 16 17 17 17 17 17 18 19 20 20 21 21 22 22 22 23 23 23 25 25 26 27 27 28 28 28 28 29 29 30 31 31 31 32 33 33 33 34 35 35 35 36 37 37 38 39 39 39 39 40 41 41 42 42 42 43 44 48 48 50 52 53 55 56 57 57 57 58 65 68 71 74 75 76 76 82 ...

output:

42 287179924

result:

ok 2 number(s): "42 287179924"

Test #12:

score: 0
Accepted
time: 6ms
memory: 15524kb

input:

1234
1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 4 5 5 5 5 6 6 7 7 7 7 7 7 7 8 8 8 8 9 9 10 10 10 11 11 11 11 11 12 13 13 14 14 15 15 15 15 16 16 16 17 17 17 18 18 18 19 19 19 19 19 19 19 19 19 19 20 20 20 21 21 21 21 21 22 22 22 23 23 23 23 23 23 23 23 23 24 24 24 24 24 24 24 24 24 24 25 25 25 25 25 26 26 26 26 ...

output:

239 98119841

result:

ok 2 number(s): "239 98119841"

Test #13:

score: 0
Accepted
time: 20ms
memory: 46684kb

input:

2345
1 1 2 2 2 7 7 9 9 9 9 15 17 19 19 22 23 24 25 29 29 29 30 31 32 33 35 37 39 41 42 42 43 43 44 46 46 46 47 48 48 50 51 51 52 53 53 54 55 56 57 58 58 60 61 63 63 64 65 65 65 66 67 67 67 69 69 69 70 71 72 72 73 73 74 75 75 77 77 79 83 85 86 88 90 90 91 93 94 97 99 104 106 107 108 108 109 109 110 1...

output:

1239 588926916

result:

ok 2 number(s): "1239 588926916"

Test #14:

score: 0
Accepted
time: 58ms
memory: 97324kb

input:

3456
4 7 8 8 9 19 20 21 22 23 23 27 29 29 32 32 33 43 45 50 52 52 55 58 58 58 60 62 66 67 68 69 71 74 74 76 77 79 82 82 87 87 88 91 93 95 96 97 99 102 104 106 107 108 121 121 123 126 127 131 137 138 139 142 145 147 152 156 157 159 161 165 166 170 170 172 174 175 178 182 183 185 186 189 190 195 195 1...

output:

2239 24387925

result:

ok 2 number(s): "2239 24387925"

Test #15:

score: 0
Accepted
time: 105ms
memory: 159176kb

input:

4456
4 7 10 10 22 24 29 33 33 34 35 37 40 41 47 48 55 61 61 65 69 71 76 91 95 99 105 105 105 110 112 113 117 117 120 121 122 123 125 127 130 134 135 138 140 141 142 142 144 150 153 154 157 162 165 169 170 170 174 175 176 178 197 198 198 201 208 211 211 212 214 214 215 217 220 224 224 225 230 231 232...

output:

3239 904395650

result:

ok 2 number(s): "3239 904395650"

Test #16:

score: 0
Accepted
time: 183ms
memory: 199312kb

input:

5000
1 5 7 8 24 28 36 47 50 56 59 64 66 85 89 94 95 95 98 108 110 117 122 155 157 158 163 172 172 179 186 197 198 220 236 251 254 254 256 265 287 288 298 302 306 312 327 336 343 344 345 348 350 360 363 364 382 382 390 399 402 406 412 421 425 435 442 445 450 451 453 478 481 490 491 496 499 500 500 50...

output:

4239 328488156

result:

ok 2 number(s): "4239 328488156"

Test #17:

score: -100
Wrong Answer
time: 51ms
memory: 199156kb

input:

5000
5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 ...

output:

5000 -680689503

result:

wrong answer 2nd numbers differ - expected: '317554850', found: '-680689503'