another 4 sorting and searching problems

CSES - CSES Problem Set/Maximum_Subarray_Sum.cpp

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+//  Maximum Subarray Sum
+
+#include<bits/stdc++.h>
+
+using namespace std;
+using ll = long long;
+
+int main() {
+    int n; cin >> n;
+    ll max_sum = INT32_MIN;
+    ll current_sum = INT32_MIN;
+    for (int i{}; i < n; i++) {
+        ll a; cin >> a;
+        current_sum = max(current_sum + a, a);
+        max_sum = max(current_sum, max_sum);
+    }
+    cout << max_sum << endl;
+    return 0;
+}