Submission #147625

#	Time	Username	Problem	Language	Result	Execution time	Memory
147625		xDWaffle	Ljetopica (COI19_ljetopica)	C++11	0 / 100	3 ms	376 KiB

ljetopica

#include <bits/stdc++.h>
#define ff(j, a, b) for(int j=a;j<b;j++)
#define pb push_back;

using namespace std;

typedef long long ll;

ll n, k;
ll a, b, path;

void load_path()
{
    path=pow(2, n-1);
    ff(j, 0, n-1)
    {
        char tmp;
        cin >> tmp;
        if(tmp=='R')
        {
            path+=pow(2, n-2-j);
        }
    }
}

ll bin_string_to_ll(string s)
{

    ll res=1;
    ff(j, 1, s.size())
    {
       res=res*2;
       if(s[j]=='1')
       {
            res++;
       }
    }
    return res;
}

int main()
{
    cin >> n >> k;
    load_path();
    string tmpstrng;
    cin >> tmpstrng;
    a=bin_string_to_ll(tmpstrng);
    cin >> tmpstrng;
    b=bin_string_to_ll(tmpstrng);
    ///zavrseno ucitavanje!!

    /// XOR <=> ^

    ll altpath= ((1 << (n-1))-1) ^ path;
    ll sum=0;
    if(path<=b && path>=a)
    {
        sum+=path;
    }
    if(altpath<=b && altpath>=a)
    {
        sum+=altpath;
    }
    cout << sum;
    return 0;
}

Compilation message (stderr)

ljetopica.cpp: In function 'll bin_string_to_ll(std::__cxx11::string)':
ljetopica.cpp:2:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define ff(j, a, b) for(int j=a;j<b;j++)
ljetopica.cpp:30:8:
     ff(j, 1, s.size())
        ~~~~~~~~~~~~~~             
ljetopica.cpp:30:5: note: in expansion of macro 'ff'
     ff(j, 1, s.size())
     ^~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 17
• Subtask 4: 0 / 61