2 条题解
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作者:lydrainbowcat 题解:https://www.acwing.com/solution/content/28044/
#include<bits/stdc++.h> using namespace std; const int mod = 11380; int f[31][11][11][11], L1, L2, L3, D; int main() { cin >> L1 >> L2 >> L3 >> D; for (int i = 0; i <= D; i++) f[i][0][0][0] = 1; for (int i = 1; i <= D; i++) for (int j = 0; j <= L1; j++) for (int k = 0; k <= L2; k++) for (int l = 0; l <= L3; l++) { if (j > 0) { // 第一段最外层是{} for (int p = 1; p <= j; p++) for (int q = 0; q <= k; q++) for (int r = 0; r <= l; r++) f[i][j][k][l] = (f[i][j][k][l] + f[i - 1][p - 1][q][r] * f[i][j - p][k - q][l - r]) % mod; } if (k > 0) { // 第一段最外层是[] for (int q = 1; q <= k; q++) for (int r = 0; r <= l; r++) f[i][j][k][l] = (f[i][j][k][l] + f[i - 1][0][q - 1][r] * f[i][j][k - q][l - r]) % mod; } if (l > 0) { // 第一段最外层是() for (int r = 1; r <= l; r++) f[i][j][k][l] = (f[i][j][k][l] + f[i - 1][0][0][r - 1] * f[i][j][k][l - r]) % mod; } } cout << (f[D][L1][L2][L3] - (D ? f[D - 1][L1][L2][L3] : 0) + mod) % mod << endl; } -
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/* 作者:lydrainbowcat 题解:https://www.acwing.com/solution/content/28044/ */ #include<bits/stdc++.h> using namespace std; const int mod = 11380; int f[31][11][11][11], L1, L2, L3, D; int main() { cin >> L1 >> L2 >> L3 >> D; for (int i = 0; i <= D; i++) f[i][0][0][0] = 1; for (int i = 1; i <= D; i++) for (int j = 0; j <= L1; j++) for (int k = 0; k <= L2; k++) for (int l = 0; l <= L3; l++) { if (j > 0) { // 第一段最外层是{} for (int p = 1; p <= j; p++) for (int q = 0; q <= k; q++) for (int r = 0; r <= l; r++) f[i][j][k][l] = (f[i][j][k][l] + f[i - 1][p - 1][q][r] * f[i][j - p][k - q][l - r]) % mod; } if (k > 0) { // 第一段最外层是[] for (int q = 1; q <= k; q++) for (int r = 0; r <= l; r++) f[i][j][k][l] = (f[i][j][k][l] + f[i - 1][0][q - 1][r] * f[i][j][k - q][l - r]) % mod; } if (l > 0) { // 第一段最外层是() for (int r = 1; r <= l; r++) f[i][j][k][l] = (f[i][j][k][l] + f[i - 1][0][0][r - 1] * f[i][j][k][l - r]) % mod; } } cout << (f[D][L1][L2][L3] - (D ? f[D - 1][L1][L2][L3] : 0) + mod) % mod << endl; }
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信息
- ID
- 1404
- 时间
- 1000ms
- 内存
- 128MiB
- 难度
- 2
- 标签
- 递交数
- 34
- 已通过
- 24
- 上传者