目录
题目
待添加
解法一
cpp
int max(int a, int b) {
return a > b ? a : b;
}
int search(int** matrix, int m, int n, int i, int j, int (*dp)[n]) {
if (dp[i][j]) {
return dp[i][j];
}
int len = 0;
if (i > 0 && matrix[i - 1][j] > matrix[i][j]) {
len = max(len, search(matrix, m, n, i - 1, j, dp));
}
if (i + 1 < m && matrix[i + 1][j] > matrix[i][j]) {
len = max(len, search(matrix, m, n, i + 1, j, dp));
}
if (j > 0 && matrix[i][j - 1] > matrix[i][j]) {
len = max(len, search(matrix, m, n, i, j - 1, dp));
}
if (j + 1 < n && matrix[i][j + 1] > matrix[i][j]) {
len = max(len, search(matrix, m, n, i, j + 1, dp));
}
dp[i][j] = len + 1;
return dp[i][j];
}
int longestIncreasingPath(int** matrix, int matrixSize, int* matrixColSize) {
const int m = matrixSize, n = *matrixColSize;
int dp[m][n];
memset(dp, 0, sizeof(dp));
int len = 0;
for (int i = 0; i < m; i++) {
for (int j = 0; j < n; j++) {
len = max(len, search(matrix, m, n, i, j, dp));
}
}
return len;
}