1 #include <iostream> 2 #include <cstdio> 3 #include <map> 4 #include <string.h> 5 #include <cstring> 6 #include <string> 7 using namespace std; 8 map<string,int> b; 9 int main(){10     int n;11     char s[35];12     scanf("%d",&n);13     getchar();14     for(int i=0;i<n;i++){15         scanf("%s",s);16         if(b[s]!=0){17             int k=b[s];18             printf("%s%d\n",s,k);19             b[s]++;20         }21         else {22             printf("OK\n");23             b[s]++;24         }25     }26     return 0;27 }