Lang:G++
Edit12345678910111213141516171819202122232425262728293031#include <cstdio>#include <cstring>using namespace std;const int N = 805;char s[N];int main() {//freopen("in.txt", "r", stdin);gets(s + 1);int n = strlen(s+1);bool flag = true;// for(int i = 1;i <= n; ++ i) {// if(s[i] != '@') continue;// if(flag) flag = false;// else printf(" ");// while(i + 1 <= n && ((s[i + 1] >= 'A' && s[i + 1] <= 'Z') || (s[i + 1] >= 'a' && s[i + 1] <= 'z'))) {// putchar(s[++ i]);// }// }// printf("\n");for(int i = 1;i <= n; ++ i) {if(s[i] != '@') continue;int cnt = 0;while(i + 1 <= n && ((s[i + 1] >= 'A' && s[i + 1] <= 'Z') || (s[i + 1] >= 'a' && s[i + 1] <= 'z'))) { ++cnt; break;}if(!cnt ) continue;if(flag) flag = false;else printf(" ");while(i + 1 <= n && ((s[i + 1] >= 'A' && s[i + 1] <= 'Z') || (s[i + 1] >= 'a' && s[i + 1] <= 'z'))) {putchar(s[++ i]);}}printf("\n");