#include <iostream>
#include <sstream>
#include <string>
using namespace std;
 
int main() {
	bool valid=false;
	int road;
 
    while (!valid) {
    	string line; 
        cout << "how long is the road in meters " << endl;
        getline(cin, line);  
        valid = true; 
        stringstream sst(line); 
        sst>>road; 
        if ((sst.fail()) || ((road > 250) || (road < 0)))
        {
            cout << "Please enter an Integer which is between 0 and 250." << endl;
            valid = false; 
        }
    }
    cout <<road; 
    return 0;
}

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

YWJjIAoxMDA=

abc 
100