diff --git "a/JinHyeok/202507/22 \354\204\240\352\270\213\352\270\260.md" "b/JinHyeok/202507/22 \354\204\240\352\270\213\352\270\260.md"
new file mode 100644
index 0000000..535f7a6
--- /dev/null
+++ "b/JinHyeok/202507/22 \354\204\240\352\270\213\352\270\260.md"	
@@ -0,0 +1,46 @@
+```
+#include <iostream>
+#include <vector>
+#include <algorithm>
+
+using namespace std;
+
+int main() {
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int N;
+    cin >> N;
+
+    vector<pair<int, int>> lines(N);
+    for (int i = 0; i < N; i++) {
+        cin >> lines[i].first >> lines[i].second;
+    }
+
+    sort(lines.begin(), lines.end());
+
+    long long totalLength = 0;
+    int currentStart = lines[0].first;
+    int currentEnd = lines[0].second;
+
+    for (int i = 1; i < N; i++) {
+        int nextStart = lines[i].first;
+        int nextEnd = lines[i].second;
+
+        if (nextStart <= currentEnd) {
+            currentEnd = max(currentEnd, nextEnd);
+        } else {
+            totalLength += (long long)(currentEnd - currentStart);
+            currentStart = nextStart;
+            currentEnd = nextEnd;
+        }
+    }
+
+    totalLength += (long long)(currentEnd - currentStart);
+
+    cout << totalLength << '\n';
+
+    return 0;
+}
+
+```