#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
vector<string> v = {"aaa", "bbb", "ccc", "ddd", "eee", "fff"};
bool b = all_of(v.begin(), v.end(), [](const string & s) {
return s.size() == 3;
});
cout << b;
return 0;
}
/*
run:
1
*/