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staircase
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35 lines (34 loc) · 771 Bytes
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#include <bits/stdc++.h>
using namespace std;
string ltrim(const string &);
string rtrim(const string &);
void staircase(int n) {
for(int i=0;i<n;i++) {
cout << setfill(' ') << setw(n-(i+1)) << "";
cout << setfill('#') << setw(i+1) << '#'<< endl;
}
}
int main()
{
string n_temp;
getline(cin, n_temp);
int n = stoi(ltrim(rtrim(n_temp)));
staircase(n);
return 0;
}
string ltrim(const string &str) {
string s(str);
s.erase(
s.begin(),
find_if(s.begin(), s.end(), not1(ptr_fun<int, int>(isspace)))
);
return s;
}
string rtrim(const string &str) {
string s(str);
s.erase(
find_if(s.rbegin(), s.rend(), not1(ptr_fun<int, int>(isspace))).base(),
s.end()
);
return s;
}