Create 983.cpp

Solved the Minimum Cost for Tickets (983) problem on LeetCode.

Author: andreibogdanflorea

leetcode/cpp/dynamic programming/983.cpp

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+class Solution {
+public:
+    int mincostTickets(vector<int>& days, vector<int>& costs) {
+        int n_days = (int)days.size();
+        int last_day = days[n_days - 1];
+        vector<int> cost(last_day + 1,0);
+        int j = 0;
+        int z = 0;
+        for(int i = 1; i <= last_day; i++){
+            if(days[j] == i){
+                j++;
+                int a = INT_MAX, b = INT_MAX, c = INT_MAX;
+                a = cost[i - 1] + costs[0];
+                b = cost[max(z, i - 7)] + costs[1];
+                c = cost[max(z, i - 30)] + costs[2];
+                cost[i] = min({a, b, c});
+            }
+            else cost[i] = cost[i-1];
+        }
+
+        return cost[last_day];
+    }
+};