atcoder/abc184A

Author: xirc

atcoder/abc184/A/main.cpp

@@ -0,0 +1,17 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+using ll = int64_t;
+using ff = long double;
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(0); cout.tie(0);
+
+    int a, b, c, d;
+    cin >> a >> b >> c >> d;
+    int det = a * d - b * c;
+    cout << det << endl;
+
+    return 0;
+}