feat: 添加P2905.cpp解决牛和草场的位置记录问题

src/11/20/P2905.cpp

@@ -0,0 +1,26 @@
+#include <cstdint>
+#include <iostream>
+#include <istream>
+using ll = int64_t;
+
+ll n,m,k;
+const ll maxn=1000+7;
+bool cow[maxn][maxn],g[maxn][maxn];
+
+int main(){
+    std::iostream::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin>>n>>m>>k;
+    for(ll i=1;i<=n;i++){
+        ll x,y;
+        std::cin>>x>>y;
+        cow[x][y]=true;
+    }
+    for(ll i=1;i<=m;i++){
+        ll x,y;
+        std::cin>>x>>y;
+        g[x][y]=true;
+    }
+    
+}