CF EDU 130, finished a and b

codeforces/educational_rounds/130/a.cpp

@@ -0,0 +1,37 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+void test_case(int tc){
+    int n, m;
+    cin >> n >> m;
+
+    int distance = 0;
+
+    for(int i = 0; i < n; ++i){
+        int a;
+        cin >> a;
+
+        distance += a;
+    }
+
+    cout << max(0, distance - m) << '\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;
+}