Create subsetSumProblem.cpp

Recursion DP/subsetSumProblem.cpp

@@ -0,0 +1,60 @@
+#include <bits/stdc++.h> 
+using namespace std;
+#define     mod             1e9+7
+#define     ll              long long
+#define     mp              make_pair
+#define     t()             int test;cin>>test;while(test--)
+#define     setbits(x)      __builtin_popcountll(x)
+#define     si              set<int>
+#define     ii              pair<int,int>
+#define     que_max         priority_queue <int>
+#define     que_min         priority_queue <int, vi, greater<int>>
+#define     IOS             ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
+#define     endl            '\n'
+
+const int N = 2e5 + 5;
+int a[N];
+
+//calculate subset sum using dynamic programming
+void subsetSum(){
+
+	int n,sum;
+	cin>>n>>sum; //input the length of array and sum
+	vector<int> v(n);
+
+	for(int i=0;i<n;i++) cin>>v[i];   //input the array elements
+
+	bool t[n+1][sum+1];  
+
+	for(int i=0;i<=n;i++){             //initialisation of the 2D array
+		for(int j=0;j<=sum;j++){
+			if(i == 0) t[i][j] = false;
+			if(j == 0) t[i][j] = true;
+		}
+	}
+
+	for(int i=1;i<=n;i++){
+		for(int j=1;j<=sum;j++){
+			if(v[i-1] <= j)
+				t[i][j] = t[i-1][j-v[i-1]] || t[i-1][j];
+			else
+				t[i][j] = t[i-1][j];
+		}
+	}
+	cout<<t[n][sum];  
+}
+
+int32_t main()
+
+{  
+    #ifndef ONLINE_JUDGE
+    	freopen("input1.txt", "r", stdin);
+    	freopen("output1.txt", "w", stdout);
+    #endif
+
+    IOS;
+
+    solve();
+
+
+}