update

src/20241121/U504523.cpp

@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+using ll =int64_t;
+
+const ll maxn{ll(1e6+5)};
+ll a[maxn],d[maxn];
+
+
+int main(){
+    ios::sync_with_stdio(false);
+    cin.tie(0);
+    int n;
+    cin >> n;
+    for(int i=0;i<n;i++){
+        cin >> a[i] >> d[i];
+    }
+    sort(a, a+n);
+    sort(d,d+n);
+    int j = 0;
+    int k = 0;
+    for(int i=0;i<n;i++){
+        if(a[i] > d[j]){
+            k++;
+            j++;
+            if(j == n){
+                break;
+            }
+        }
+    }
+    cout << (n - k) <<'\n';
+}

src/20241121/card/card1.ans

@@ -0,0 +1 @@
+4

src/20241121/card/card1.in

@@ -0,0 +1,6 @@
+5
+6 7
+5 8
+6 9
+3 6
+3 4

src/20241121/card/card2.ans

@@ -0,0 +1 @@
+750215

src/20241121/card/card3.ans

@@ -0,0 +1 @@
+138

src/20241121/card/card4.ans

@@ -0,0 +1 @@
+500739