Created
May 10, 2018 04:43
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class Solution { | |
public: | |
int deleteAndEarn(vector<int>& nums) { | |
if (nums.empty())return 0; | |
map<int, int> cnts; | |
for (const auto& num : nums)++cnts[num]; | |
vector<vector<int>> dp(cnts.size(), vector<int>(2, INT_MAX)); | |
auto iter = cnts.begin(); | |
dp[0][0] = 0; | |
dp[0][1] = cnts[iter->first] * iter->first; | |
int n = cnts.size(), prev = iter->first; | |
++iter; | |
for(int i = 1; i < n; ++i, ++iter) | |
{ | |
dp[i][0] = max(dp[i - 1][0], dp[i - 1][1]); | |
dp[i][1] = iter->first - prev == 1 ? cnts[iter->first] * iter->first + dp[i - 1][0] : cnts[iter->first] * iter->first + max(dp[i - 1][0], dp[i - 1][1]); | |
prev = iter->first; | |
} | |
return max(dp[n - 1][0], dp[n - 1][1]); | |
} | |
}; |
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