Acronim

#include <iostream>
#include <cstring>
using namespace std;

int main()
{
    char c[101],b[101];
    int nr=0;
    cin.getline(c,101);
    for(int i=0;i<(int)strlen(c);++i)
	    if((c[i]>='A'&&c[i]<='Z')&&((c[i-1]==' ')||i==0))
	        b[nr++]=c[i];
    b[nr]='\0';
    cout<<b;
    return 0;
}