C - Long Sequence

https://atcoder.jp/contests/abc220/submissions/26156831

AtCoder/ABC220/C/C.cpp

@@ -0,0 +1,33 @@
+#pragma GCC optimize("Ofast")
+
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n;
+long long a[100005], b, x, s, ans;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin >> n;
+    for (int i = 1; i <= n; i++) {
+        cin >> a[i];
+        b += a[i];
+    }
+    cin >> x;
+    s = (x / b) * b;
+    ans = (x / b) * n;
+    if (x % b == 0) {
+        cout << ++ans << endl;
+        exit(0);
+    }
+    for (int i = 1; i <= n; i++) {
+        s += a[i];
+        if (s > x) {
+            ans += i;
+            break;
+        }
+    }
+    cout << ans << endl;
+    return 0;
+}