6
返回:2
class Coins { public: int countWays(int n) { // write code here int coins[4]={1,5,10,25}; int dp[100001] = {0}; dp[0] = 1; for(int i = 0;i < 4;++i){ for(int j = coins[i];j <= n;++j){ dp[j] =(dp[j]+dp[j-coins[i]])%1000000007; } } return dp[n]; } };
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