代码实现:
class Solution {
public:
int integerBreak(int n) {
vector<int> dp(n + 1);
dp[2] = 1;
for(int i = 3; i <= n; i++){
for(int j = 1; j <= i / 2; j++){
dp[i] = max(dp[i], max((i - j) * j, dp[i - j] * j));
}
}
return dp[n];
}
};
代码实现:
class Solution {
public:
int numTrees(int n) {
vector<int> dp(n + 1, 0);
dp[0] = 1;
for(int i = 1; i <= n; i++){
for(int j = 1; j <= i; j++){
dp[i] += dp[j - 1] * dp[i - j];
}
}
return dp[n];
}
};