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直接用 string 模拟不行吗? 题目还有什么特殊意思吗#include <iostream> #include <string> using namespace std; int main() { string str,com,in; long index; int n,i; while( cin >> str ) { scanf("%d",&n); while( n-- ) { cin>>com; if( com == "Q") { cin>>index; cout<<str[index-1] << endl; } if( com == "I") { cin>>in>>index; if( index >= str.length() ) index = str.length()+1 ; str.insert(index-1,in); } } str=""; } return 0; } Followed by:
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