Upload ABC400 codes

AtCoder/ABC_400/A.cpp

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+#include <bits/stdc++.h>
+#define lo long long
+#define INF INT_MAX
+#define LLM LONG_LONG_MAX
+#define endl "\n"
+
+using namespace std;
+/*
+    toothless. #17
+    @fredcss_dev
+*/
+
+int a;
+
+signed main()
+{
+    cin >> a;
+    if (400 % a == 0) cout << 400 / a;
+    else cout << -1;
+    return 0;
+}