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krahets
2024-03-21 04:22:07 +08:00
parent 35a07170c0
commit cfdb743939
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6
docs/chapter_dynamic_programming/dp_problem_features.md
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@ -164,7 +164,7 @@ $$
dp[1] = cost[1]
dp[2] = cost[2]
// 状态转移：从较小子问题逐步求解较大子问题
for i in stride(from: 3, through: n, by: 1) {
for i in 3 ... n {
dp[i] = min(dp[i - 1], dp[i - 2]) + cost[i]
}
return dp[n]
@ -421,7 +421,7 @@ $$
return cost[n]
}
var (a, b) = (cost[1], cost[2])
for i in stride(from: 3, through: n, by: 1) {
for i in 3 ... n {
(a, b) = (b, min(a, b) + cost[i])
}
return b
@ -721,7 +721,7 @@ $$
dp[2][1] = 0
dp[2][2] = 1
// 状态转移：从较小子问题逐步求解较大子问题
for i in stride(from: 3, through: n, by: 1) {
for i in 3 ... n {
dp[i][1] = dp[i - 1][2]
dp[i][2] = dp[i - 2][1] + dp[i - 2][2]
}