diff --git a/src/week5/BOJ1931/BOJ1931_V1.cpp b/src/week5/BOJ1931/BOJ1931_V1.cpp
new file mode 100644
index 0000000..5469c4e
--- /dev/null
+++ b/src/week5/BOJ1931/BOJ1931_V1.cpp
@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main() {
+
+    ios_base::sync_with_stdio(false);
+    cin.tie(nullptr);
+    cout.tie(nullptr);
+
+    int n;
+    cin >> n;
+    vector<pair<int, int>> inp;
+
+    for (int i=0; i<n; i++) {
+        int st,ed;
+        cin >> st >> ed;
+        inp.push_back({ed,st});
+    }
+
+    sort(inp.begin(), inp.end());
+
+    int t=0, ret=0;
+    for (pair<int, int> next : inp) {
+        if (next.second >= t) {
+            ret++;
+            t = next.first;
+        }
+    }
+
+    cout << ret;
+
+    return 0;
+}
\ No newline at end of file