'commit'

TangDou/CSP-J/AcWingTraining/MaiChePai_2.cpp

@@ -0,0 +1,48 @@
+#include <bits/stdc++.h>
+using namespace std;
+string s, ans;
+int n, k;
+int mi = 0x3f3f3f3f;
+
+int main() {
+    cin >> n >> k >> s;
+
+    for (int i = 0; i < 10; i++) {
+        int r = k, sum = 0;
+        string sAfter = s;
+
+        // 数字等于目标数字i
+        for (int t = 0; t < n; t++)
+            if (r && sAfter[t] - '0' == i) r--;
+
+        // 从左到右，找到比i大的数字，改小,修改为i
+        for (int j = 1; j < 10; j++) {
+            for (int t = 0; t < n; t++) {
+                if (r && sAfter[t] - '0' == i + j) {
+                    r--;                 // 次数-1
+                    sum += j;            // 代价
+                    sAfter[t] = i + '0'; // 修改后
+                }
+            }
+
+            // 从右往左,找到比i小的数字，改大，修改为i
+            for (int t = n - 1; t >= 0; t--) {
+                if (r && sAfter[t] - '0' == i - j) {
+                    r--;
+                    sum += j;
+                    sAfter[t] = i + '0';
+                }
+            }
+        }
+
+        if (sum < mi) {
+            mi = sum;
+            ans = sAfter;
+        } else if (sum == mi)
+            ans = min(ans, sAfter);
+    }
+
+    cout << mi << endl;
+    cout << ans << endl;
+    return 0;
+}