Day 20 streak

Author: prajwal714

Interview Bit/Binary Search/Painters Partition problem.cpp

@@ -0,0 +1,54 @@
+bool isValid(vector<int> C, int max_painters, int mid)
+{
+    int painter=1;
+    long long int sum=0;
+    
+    for(int i=0;i<C.size();i++)
+    {
+        sum+=C[i];
+        if(sum>mid)
+        {
+            sum=C[i];
+            painter++;
+        }
+        
+        if(painter>max_painters)
+        return false;
+    }
+    return true;
+}
+
+int Solution::paint(int A, int B, vector<int> &C) {
+    
+    int n=C.size();
+    if(A>n)
+    A=n;
+    
+    int start=-1;
+    long long int end=0;
+    
+    int i;
+    for(i=0;i<n;i++)
+    {
+        start=max(start,C[i]);
+        end+=C[i];
+    }
+    long long int res=-1;
+    while(start<=end)
+    {
+        long long int mid=start+(end-start)/2;
+        
+        if(isValid(C,A,mid)==true)
+        {
+            res=mid;
+            end=mid-1;
+        }
+        else
+        start=mid+1;
+    }
+    
+    return (int)((res*B)%10000003);
+    
+    
+}
+