#1910. 签到题（qiandao）

https://sjzezoj.com/submission/69057

S2OJ/1910/1910.cpp

@@ -0,0 +1,31 @@
+#include <iostream>
+#include <vector>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1e6 + 5;
+
+int n, m, k, c, d[N], ans;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> n >> m >> k >> c;
+
+    for (int i = 1, u, v; i <= k; i++) {
+        cin >> u >> v;
+
+        d[u]++, d[v + n]++;
+    }
+
+    for (int i = 1; i <= n + m; i++) {
+        if (d[i] % c != 0) ans++;
+    }
+
+    cout << ans << endl;
+
+    return 0;
+}