unique_path
unique_path.go 源码
package main
//不同路径
func uniquePaths1(m int, n int) int {
dp := make([][]int, m)
for i := range dp {
dp[i] = make([]int, n)
}
for i := 0; i < m; i++ {
for j := 0; j < n; j++ {
if i == 0 || j == 0 {
dp[i][j] = 1
} else {
dp[i][j] = dp[i-1][j] + dp[i][j-1]
}
}
}
return dp[m-1][n-1]
}
//简化一维的写法
func uniquePaths2(m int, n int) int {
dp := make([]int, n)
for i := 0; i < m; i++ {
for j := 0; j < n; j++ {
if j == 0 {
dp[j] = 1
} else {
dp[j] += dp[j-1]
}
}
}
return dp[n-1]
}
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