diff --git a/S2OJ/1737/1737.cpp b/S2OJ/1737/1737.cpp
new file mode 100644
index 00000000..4d8c82fc
--- /dev/null
+++ b/S2OJ/1737/1737.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e7 + 5;
+
+long long l, r, k, ans;
+int cnt, primes[N];
+bool vis[N];
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> l >> r >> k;
+
+    for (long long i = 2; i * i <= r && i <= k; i++) {
+        for (long long j = std::max(((l + i - 1) / i) * i, i * 2); j <= r; j += i) {
+            vis[j - l + 1] = true;
+        }
+    }
+
+    for (long long i = l; i <= r; i++) {
+        if (!vis[i - l + 1]) ans ^= i;
+    }
+
+    cout << ans << endl;
+
+    return 0;
+}
diff --git a/S2OJ/1737/data/ex_prime1.in b/S2OJ/1737/data/ex_prime1.in
new file mode 100644
index 00000000..e4c1acb3
--- /dev/null
+++ b/S2OJ/1737/data/ex_prime1.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d476c83b35bcfa6aa8c68cefb653257fe824c3a37dbcd94f648b4e6ba809859f
+size 7
diff --git a/S2OJ/1737/data/ex_prime1.out b/S2OJ/1737/data/ex_prime1.out
new file mode 100644
index 00000000..ca267b30
--- /dev/null
+++ b/S2OJ/1737/data/ex_prime1.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1121cfccd5913f0a63fec40a6ffd44ea64f9dc135c66634ba001d10bcf4302a2
+size 2
diff --git a/S2OJ/1737/data/ex_prime2.in b/S2OJ/1737/data/ex_prime2.in
new file mode 100644
index 00000000..b92e43f0
--- /dev/null
+++ b/S2OJ/1737/data/ex_prime2.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0359563f2ba3ebc2ab142fccb9f743b960c0228321f00c3dde1591c64a0337a1
+size 17
diff --git a/S2OJ/1737/data/ex_prime2.out b/S2OJ/1737/data/ex_prime2.out
new file mode 100644
index 00000000..5f6a5e5f
--- /dev/null
+++ b/S2OJ/1737/data/ex_prime2.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3eb86308a2708efd428b931a04f77489b82a8ae57aa960f2f08b352710aebbe9
+size 4
diff --git a/S2OJ/1737/data/ex_prime3.in b/S2OJ/1737/data/ex_prime3.in
new file mode 100644
index 00000000..b153162e
--- /dev/null
+++ b/S2OJ/1737/data/ex_prime3.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7dfe626a57cbf1d63d35b4f49d103f53086553ab751859e455617b135e723a04
+size 28
diff --git a/S2OJ/1737/data/ex_prime3.out b/S2OJ/1737/data/ex_prime3.out
new file mode 100644
index 00000000..ea7570e1
--- /dev/null
+++ b/S2OJ/1737/data/ex_prime3.out
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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+size 4
diff --git a/S2OJ/1737/data/prime1.in b/S2OJ/1737/data/prime1.in
new file mode 100644
index 00000000..bdedb535
--- /dev/null
+++ b/S2OJ/1737/data/prime1.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0a5c0ce29b616a134ab467cb3af07bca0b9fedd0a81a1696d9ef68f868ba95cd
+size 12
diff --git a/S2OJ/1737/data/prime1.out b/S2OJ/1737/data/prime1.out
new file mode 100644
index 00000000..5246308b
--- /dev/null
+++ b/S2OJ/1737/data/prime1.out
@@ -0,0 +1,3 @@
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diff --git a/S2OJ/1737/data/prime10.in b/S2OJ/1737/data/prime10.in
new file mode 100644
index 00000000..7e125ef9
--- /dev/null
+++ b/S2OJ/1737/data/prime10.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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diff --git a/S2OJ/1737/data/prime10.out b/S2OJ/1737/data/prime10.out
new file mode 100644
index 00000000..804fcc90
--- /dev/null
+++ b/S2OJ/1737/data/prime10.out
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diff --git a/S2OJ/1737/data/prime11.in b/S2OJ/1737/data/prime11.in
new file mode 100644
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--- /dev/null
+++ b/S2OJ/1737/data/prime11.in
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+version https://git-lfs.github.com/spec/v1
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diff --git a/S2OJ/1737/data/prime11.out b/S2OJ/1737/data/prime11.out
new file mode 100644
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--- /dev/null
+++ b/S2OJ/1737/data/prime11.out
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new file mode 100644
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--- /dev/null
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diff --git a/S2OJ/1737/data/prime12.out b/S2OJ/1737/data/prime12.out
new file mode 100644
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--- /dev/null
+++ b/S2OJ/1737/data/prime12.out
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new file mode 100644
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--- /dev/null
+++ b/S2OJ/1737/data/prime13.in
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diff --git a/S2OJ/1737/data/prime13.out b/S2OJ/1737/data/prime13.out
new file mode 100644
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--- /dev/null
+++ b/S2OJ/1737/data/prime13.out
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+version https://git-lfs.github.com/spec/v1
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diff --git a/S2OJ/1737/data/prime14.in b/S2OJ/1737/data/prime14.in
new file mode 100644
index 00000000..f613b669
--- /dev/null
+++ b/S2OJ/1737/data/prime14.in
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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diff --git a/S2OJ/1737/data/prime14.out b/S2OJ/1737/data/prime14.out
new file mode 100644
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--- /dev/null
+++ b/S2OJ/1737/data/prime14.out
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+version https://git-lfs.github.com/spec/v1
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new file mode 100644
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--- /dev/null
+++ b/S2OJ/1737/data/prime15.in
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new file mode 100644
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new file mode 100644
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--- /dev/null
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new file mode 100644
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--- /dev/null
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new file mode 100644
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--- /dev/null
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new file mode 100644
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--- /dev/null
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new file mode 100644
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--- /dev/null
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--- /dev/null
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