diff --git a/AcWing/659/659.cpp b/AcWing/659/659.cpp
new file mode 100644
index 00000000..8fc0c07b
--- /dev/null
+++ b/AcWing/659/659.cpp
@@ -0,0 +1,21 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+double x;
+
+int main() {
+    cin >> x;
+    if (0 <= x && x <= 25) {
+        cout << "Intervalo [0,25]" << endl;
+    } else if (25 < x && x <= 50) {
+        cout << "Intervalo (25,50]" << endl;
+    } else if (50 < x && x <= 75) {
+        cout << "Intervalo (50,75]" << endl;
+    } else if (75 < x && x <= 100) {
+        cout << "Intervalo (75,100]" << endl;
+    } else {
+        cout << "Fora de intervalo" << endl;
+    }
+    return 0;
+}