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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#611047#7006. Rikka with SubsequencesyaoyanfengAC ✓818ms4160kbC++141.8kb2024-10-04 19:02:452024-10-04 19:02:50

Judging History

你现在查看的是最新测评结果

  • [2024-10-04 19:02:50]
  • 评测
  • 测评结果:AC
  • 用时:818ms
  • 内存:4160kb
  • [2024-10-04 19:02:45]
  • 提交

answer

/*
有点逆天了这题
cnt^3 显然拆成3个有序序列计数
设fijk表示三个序列,第一个结尾i,第二个j,第三个k
考虑转移相当于要求所有的 fi'j'k',mp[a[i']][i]=1
前缀和维护,具体的,每次dp,先把当前的fi{jk} 求一个二维前缀和,然后看着累加到前缀和s上。
sij的含义:首先ai=aj,然后表示的是所有颜色能转移到aj的东西的前缀和
666
*/
#include <bits/stdc++.h>
using namespace std;
const int N = 205, mod = 1e9 + 7;
int T, n;
int a[N];
char mp[N][N];
void add(int &x, int y) {
    x = x + y;
    if (x >= mod) x -= mod;
    return;
}
int f[N][N], sum[N][N], ret;
int qr(int x, int y) {
    if (x < 0 || y < 0) return 0;
    return f[x][y];
}
void solve() {
    scanf("%d", &n), ret = 0;
    for (int i = 1; i <= n; ++i) scanf("%d", a + i);
    for (int i = 1; i <= n; ++i) scanf("%s", mp[i] + 1);
    for (int i = 0; i <= n; ++i) for (int j = 0; j <= n; ++j) f[i][j] = sum[i][j] = 0;
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= n; ++j) {
            for (int k = 1; k <= n; ++k) {
                add(f[j][k], f[j - 1][k]), add(f[j][k], f[j][k - 1]), add(f[j][k], mod - f[j - 1][k - 1]);
            }
        }
        for (int j = 1; j <= n; ++j) {
            for (int k = 1; k <= n; ++k)
            if (mp[a[i - 1]][a[j]] == '1') add(sum[j][k], f[j - 1][k - 1]);
        }
        for (int j = 1; j <= n; ++j) {
            for (int k = 1; k <= n; ++k) {
                if (a[i] != a[j] || a[i] != a[k]) f[j][k] = 0;
                else f[j][k] = sum[j][k] + 1;
                add(ret, f[j][k]);
            }
        }
    }
    printf("%lld\n", ret);
    return;
}
int main() {
    scanf("%d", &T);
    while (T--) {
        solve();
    }
    return 0;
}

这程序好像有点Bug,我给组数据试试?

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 3828kb

input:

1
4
1 2 1 2
1111
1111
1111
1111

output:

51

result:

ok single line: '51'

Test #2:

score: 0
Accepted
time: 818ms
memory: 4160kb

input:

20
195
4 5 4 3 2 4 3 5 1 5 4 3 4 3 1 5 4 4 5 2 2 2 2 4 1 5 3 4 1 1 1 2 1 1 5 5 4 5 4 5 5 4 5 2 1 2 5 4 5 1 1 3 1 2 2 3 3 5 2 3 3 1 4 4 2 4 2 4 3 4 1 1 1 4 3 5 1 1 3 2 2 5 1 3 1 5 1 5 5 3 5 3 3 2 5 1 3 2 4 1 5 5 1 3 3 2 4 2 3 3 3 4 1 3 3 3 5 5 1 1 4 2 5 1 2 5 4 3 5 1 5 5 5 4 2 2 5 3 2 3 4 1 3 2 1 5 3...

output:

806298135
541285042
48173297
222851978
875793336
100057791
156057874
129923599
551277543
874547790
544405786
653241411
521317929
370918040
803940504
969296122
806596012
469227084
338962879
194278629

result:

ok 20 lines