Compile Error

/in/foo.cc: In function 'int main()':
/in/foo.cc:2:5: error: 'string' was not declared in this scope
     string a;
     ^~~~~~
/in/foo.cc:3:5: error: 'cin' was not declared in this scope
     cin>>a;
     ^~~
/in/foo.cc:3:10: error: 'a' was not declared in this scope
     cin>>a;
          ^
/in/foo.cc:5:9: error: 'cout' was not declared in this scope
         cout<<a[i];
         ^~~~

信息

递交者
类型
递交
题目
P1005 求逆序数
语言
C++
递交时间
2023-10-26 08:24:51
评测时间
2023-10-26 08:24:51
评测机
分数
0
总耗时
0ms
峰值内存
0 Bytes