Tried my first real codeforces round, got stuck way too long on one of the earlier questions, but over all, you gotta start somewhere i guess

codeforces/rounds/762/b.cpp

@@ -0,0 +1,50 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int N_MAX = 1e9;
+
+
+void test_case(int tc){
+    int n;
+    cin >> n;
+
+    set<int> valids;
+    int i = 1;
+    int r = pow(i, 2);
+    while(r <= n){
+        valids.insert(r);
+
+        i++;
+        r = pow(i, 2);
+    }
+
+    i = 1;
+    r = pow(i, 3);
+    while(r <= n){
+        valids.insert(r);
+
+        i++;
+        r = pow(i, 3);
+    }
+
+    cout << valids.size() << '\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;
+}