Create 3186. Maximum Total Damage With Spell Casting

Author: Chayandas07

3186. Maximum Total Damage With Spell Casting

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+class Solution {
+public:
+    long long dp[100005];
+    long long solve(vector<pair<int,int>>&nums,int idx){
+        if(idx>=nums.size()) return 0;
+
+        if(dp[idx]!=-1) return dp[idx];
+
+        long long take = 0,skip = 0;
+
+        int j = idx+1;
+        while(j<nums.size()){
+            if(nums[j].first!=nums[idx].first+1 && nums[j].first!=nums[idx].first+2) break;
+            j++;
+        }
+        take = 1LL*nums[idx].first*nums[idx].second + solve(nums,j);
+        skip = solve(nums,idx+1);
+
+        return dp[idx] = max(take,skip);
+    }
+    long long maximumTotalDamage(vector<int>& power) {
+        
+        int n = power.size();
+        map<int,int>mp;
+        for(auto &it:power) mp[it]++;
+        
+        vector<pair<int,int>>nums;
+        for(auto &it:mp){
+          nums.push_back({it.first,it.second});
+        }
+
+        sort(nums.begin(),nums.end());
+        
+        memset(dp,-1,sizeof(dp));
+        
+        return solve(nums,0);
+    }
+};