CF 797, got stuck on E and had to leave, went pretty well

codeforces/rounds/797/c.cpp

@@ -0,0 +1,48 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+typedef unsigned long long ull;
+
+void test_case(int tc){
+    int n;
+    cin >> n;
+
+    vector<int> s(n);
+    vector<int> f(n);
+
+    for(size_t i = 0; i < n; ++i){
+        cin >> s[i];
+    }
+
+    for(size_t i = 0; i < n; ++i){
+        cin >> f[i];
+
+        if(i != 0){
+            cout << f[i] - max(s[i], f[i-1]) << " ";
+        } else {
+            cout << f[i] - s[i] << " ";
+        }
+    }
+
+    cout << "\n";
+
+}
+
+
+
+int main(){
+    ios::sync_with_stdio(0);
+    cin.tie(0);
+
+    int t;
+    cin >> t;
+
+    for(int tc = 1; tc <= t; ++tc){
+        test_case(tc);
+    }
+
+    cout << flush;
+
+    return 0;
+}