#include <iostream>
#include <cmath>
#include <vector>
using namespace std;
int main() {
vector<float> coordinates;
string a;
getline(cin, a);
string buffer;
for(int i = 0; i<a.length(); ++i) {
if(a[i]!=' ') {
buffer+=a[i];
} if(a[i]==' '||i==a.length()-1) {
if(buffer[buffer.length()-1]=='.') {
buffer+="0";
}
float num = stof(buffer);
coordinates.push_back(num);
buffer = "";
}
}
if(coordinates.size()!=4) {
cout << "wrong data. example: 1.1 2.2 3.3 4.4";
}
float result;
int temp1, temp2, temp3, temp4;
temp1 = coordinates[0]-coordinates[2];
temp2 = coordinates[1]-coordinates[3];
temp1 = temp1 * temp1;
temp2 = temp2 * temp2;
temp3 = temp1 + temp2;
result = sqrt(temp3);
cout << result;
}
#include <iostream>
#include <string>
#include <cctype>
using namespace std;
signed main() {
string line, buff = "";
bool isPalindrome = true;
getline(cin, line);
for (int i = 0; i < line.size(); i++) {
if (isalnum(line[i]))
buff += line[i];
}
for (int i = 0; i < buff.size() / 2; ++i)
{
if (buff[i] != buff[buff.size() - i - 1])
{
isPalindrome = false;
break;
}
}
if (isPalindrome)
cout << "TRUE";
else
cout << "FALSE";
return 0;
}
