feat(DP): new dp problems formated

maximum-subarray-sum/src/validator.cpp

@@ -0,0 +1,20 @@
+#include "testlib.h"
+#include <bits/stdc++.h>
+
+using namespace std;
+
+const int MAX_NI = 1e4;
+const int MIN_NI = -1e4;
+
+int main(int argc, char* argv[]) {
+    registerValidation(argc, argv);
+    int n = inf.readInt(1, 100000, "n");
+    inf.readEoln();
+    for (int i = 0; i < n; i++) {
+        if (i != 0) inf.readSpace();
+        inf.readInt(MIN_NI, MAX_NI, "ni");
+    }
+    inf.readEoln();
+    inf.readEof();
+    return 0;
+}