'commit'

TangDou/LuoGuBook/P2669.cpp

@@ -0,0 +1,20 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+int k;          //第k天付出多少个金币
+int coin;       //多少个金币
+int day = 1;    //现在是第几天
+int main() {
+    cin >> k;
+    for (int i = 1;; i++) {            //此层循环描述的是第几轮
+        for (int j = 1; j <= i; j++) { //此层循环描述是当前轮的第几天
+            //金币数增加p个(轮次号个)
+            coin += i;
+            if (day == k) {
+                cout << coin << endl;
+                return 0;
+            }
+            day++;
+        }
+    }
+}