oj.uz

Submission #147674

# Submission time Handle Problem Language Result Execution time Memory
147674 2019-08-30T11:39:05 Z JovanK26 Ljetopica (COI19_ljetopica) C++14
14 / 100
 500 ms 4728 KB 
#include <bits/stdc++.h>
#define mod 1000000007
    using namespace std;
    long long n,k;
    string path;
    string a;
    string b;
    long long aval=0;
    long long bval=0;
    long long rez=0;
    bool vis[100000007];
    long long power(int k)
    {
        if(k==0)return (long long)1;
        if(k%2==0)
        {
            return (((power(k/2)%mod)*(power(k/2) %mod))%mod);
        }
        else
        {
            return ((((long long)2*(power(k/2)%mod)%mod)*(power(k/2)%mod))%mod);
        }
    }
    void solve(long long start,long long kk,long long nn,bool chk)
    {
        if(nn==path.size())
        {
            if(kk==0 && !vis[start] && start>=aval && start<=bval)
            {
                rez+=start;
                rez%=1000000007;
                vis[start]=1;
                //cout << start << endl;
            }
            return;
        }
        if(kk==0)
        {
            if(!chk)
            {
                if(path[nn]=='L')solve(2*start,kk,nn+1,chk);
                else
                {
                    solve(2*start+1,kk,nn+1,chk);
                }
            }
            else
            {
                if(path[nn]=='R')solve(2*start,kk,nn+1,chk);
                else
                {
                    solve(2*start+1,kk,nn+1,chk);
                }
            }

        }
        else
        {
            if(!chk)
            {
                if(path[nn]=='L')
                {
                    solve(2*start,kk,nn+1,chk);
                    solve(2*start+1,kk-1,nn+1,chk^1);
                }
                else
                {
                    solve(2*start+1,kk,nn+1,chk);
                    solve(2*start,kk-1,nn+1,chk^1);
                }

            }
            else
            {
                if(path[nn]=='R')
                {
                    solve(2*start,kk,nn+1,chk);
                    solve(2*start+1,kk-1,nn+1,chk^1);
                }
                else
                {
                    solve(2*start+1,kk,nn+1,chk);
                    solve(2*start,kk-1,nn+1,chk^1);
                }
            }
        }
    }
    int main()
    {
        cin >> n >> k;
        cin >> path;
        cin >> a;
        cin >> b;
        if(k>0)
        {
            long long br=0;
        for(long long i=a.size()-1;i>=0;i--)
        {
            if(a[i]=='1')aval+=(1<<br);
            br++;
        }
        br=0;
        for(long long i=b.size()-1;i>=0;i--)
        {
            if(b[i]=='1')bval+=(1<<br);
            br++;
        }
           solve(1,k,0,0);
           solve(1,k,0,1);
           cout << rez;
        }
        else
        {
            long long av=0;
            long long bv=0;
            long long br=0;
            for(long long i=a.size()-1;i>=0;i--)
        {
            if(a[i]=='1')
            {
                av+=power(br);
                av%=mod;
            }
            br++;
        }
        br=0;
        for(long long i=b.size()-1;i>=0;i--)
        {
            if(b[i]=='1')
            {
                bv+=power(br);
                bv%=mod;
            }
            br++;
        }
        cout << (av%mod+bv%mod)%mod;
        }
        return 0;
    }

Compilation message

ljetopica.cpp: In function 'void solve(long long int, long long int, long long int, bool)':
ljetopica.cpp:26:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(nn==path.size())
            ~~^~~~~~~~~~~~~

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 4728 KB Output is correct
2 Correct 17 ms 376 KB Output is correct
3 Correct 234 ms 880 KB Output is correct
4 Correct 236 ms 504 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 35 ms 1656 KB Output is correct
7 Correct 8 ms 3320 KB Output is correct
8 Correct 247 ms 404 KB Output is correct
9 Correct 16 ms 504 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 15 ms 1016 KB Output is correct
12 Correct 9 ms 376 KB Output is correct
13 Correct 237 ms 376 KB Output is correct
14 Correct 35 ms 376 KB Output is correct
15 Correct 64 ms 504 KB Output is correct

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1083 ms 376 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -