https://codeforces.com/contest/1015/problem/B

冒泡排序？？？？

/* *@Author: STZG *@Language: C++ */ #include <bits/stdc++.h> #include<iostream> #include<algorithm> #include<cstdlib> #include<cstring> #include<cstdio> #include<string> #include<vector> #include<bitset> #include<queue> #include<deque> #include<stack> #include<cmath> #include<list> #include<map> #include<set> //#define DEBUGusing namespace std; typedef long long ll; const int N=10000; const double PI = acos(-1.0); const double EXP = 1E-8; const int INF = 0x3f3f3f3f; int t,n,m; string str1,str2; int main() { #ifdef DEBUGfreopen("input.in", "r", stdin);//freopen("output.out", "w", stdout); #endifscanf("%d",&n);cin>>str1>>str2;vector<int>ans;for(int i=0;i<n;i++){if(str1[i]==str2[i]) continue;int pos=-1;for(int j=i+1;j<n;j++){if(str1[j]==str2[i]){pos=j;break;}}if(pos==-1){cout<< -1 <<endl;return 0;}for (int j = pos - 1; j >= i; --j) {swap(str1[j], str1[j + 1]);ans.push_back(j);}}cout << ans.size() << endl;for (int it=0;it<ans.size();it++) cout << ans[it]+1 << " ";cout << endl;//cout << "Hello world!" << endl;return 0; }

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