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답안 #148085

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
148085 2019-08-31T13:44:41 Z JovanK26 Ljetopica (COI19_ljetopica) C++14
100 / 100
 144 ms 31972 KB 
#include <bits/stdc++.h>
#define mod 1000000007
using namespace std;
int n,k;
string path,a,b;
int power[1001];
inline int add(int i,int j)
{
   if(i+j<0)return i+j+mod;
   if(i+j>=mod)return i+j-mod;
   return i+j;
}
inline int mul(int i,int j)
{
    long long temp=(long long)i*j;
    temp%=mod;
    return temp;
}
void sett()
{
    power[0]=1;
    for(int i=1;i<=n;i++)
    {
        power[i]=mul(2,power[i-1]);
    }
}
pair<int,int> f[1001][1001][2][2];
pair<int,int> solve(int depth,int br,bool chk,bool con,const string &s)
{
   pair<int,int> cur=f[depth][br][chk][con];
   if(cur!=make_pair(-1,-1))return cur;
   if(depth==path.size())return make_pair(br==k,0);
   if(br>k)return make_pair(0,0);
   int way=0;
   int cf=0;
   int sum=0;
   bool bv=s[depth+1]=='1';
   bool mv=(path[depth]=='R' && (br+chk)%2==0)||(path[depth]=='L' && (br+chk)%2==1);
   if(depth==0 && !chk)
   {
       pair<int,int> temp=solve(depth,br,!chk,con,s);
       way=add(way,temp.first);
       sum=add(sum,temp.second);
   }
   if(con)
   {
       if(mv<=bv)
       {
           pair<int,int> temp=solve(depth+1,br,chk,mv==bv,s);
           way=add(way,temp.first);
           sum=add(sum,temp.second);
           if(mv)cf=add(cf,temp.first);
       }
       if(!mv<=bv)
       {
           pair<int,int> temp=solve(depth+1,br+1,chk,!mv==bv,s);
           way=add(way,temp.first);
           sum=add(sum,temp.second);
           if(!mv)cf=add(cf,temp.first);
       }
   }
   else
   {
       for(int nbr=0;nbr<2;nbr++)
       {
           pair<int,int> temp=solve(depth+1,br+nbr,chk,con,s);
           way=add(way,temp.first);
           sum=add(sum,temp.second);
           if(mv!=nbr)cf=add(cf,temp.first);
       }
   }
   sum=add(sum,mul(cf,power[n-depth-2]));
   return f[depth][br][chk][con]=make_pair(way,sum);
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> k;
    cin >> path;
    cin >> a;
    cin >> b;
    sett();
    a[0]=b[0]='0';
    int reza=0;
    int rezb=0;
    memset(f,-1,sizeof f);
    rezb=solve(0,0,0,1,b).second;
    rezb=add(rezb,mul(power[n-1],f[0][0][0][1].first));
    memset(f,-1,sizeof f);
    reza=solve(0,0,0,1,a).second;
    reza=add(reza,mul(power[n-1],f[0][0][0][1].first));
    int rez=add(rezb,-reza);
    a[0]='1';
    for(int i=0;i<a.size();i++)
    {
        if(a[i]=='1')rez=add(rez,power[n-i-1]);
    }
    cout << rez;
    return 0;
}

Compilation message

ljetopica.cpp: In function 'std::pair<int, int> solve(int, int, bool, bool, const string&)':
ljetopica.cpp:32:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(depth==path.size())return make_pair(br==k,0);
       ~~~~~^~~~~~~~~~~~~
ljetopica.cpp: In function 'int main()':
ljetopica.cpp:96:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<a.size();i++)
                 ~^~~~~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 31768 KB Output is correct
2 Correct 34 ms 31864 KB Output is correct
3 Correct 35 ms 31840 KB Output is correct
4 Correct 34 ms 31864 KB Output is correct
5 Correct 34 ms 31732 KB Output is correct
6 Correct 34 ms 31840 KB Output is correct
7 Correct 43 ms 31844 KB Output is correct
8 Correct 34 ms 31740 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 31708 KB Output is correct
2 Correct 34 ms 31676 KB Output is correct
3 Correct 33 ms 31708 KB Output is correct
4 Correct 34 ms 31708 KB Output is correct
5 Correct 34 ms 31760 KB Output is correct
6 Correct 33 ms 31708 KB Output is correct
7 Correct 34 ms 31752 KB Output is correct
8 Correct 34 ms 31708 KB Output is correct
9 Correct 34 ms 31704 KB Output is correct
10 Correct 34 ms 31644 KB Output is correct
11 Correct 34 ms 31652 KB Output is correct
12 Correct 34 ms 31688 KB Output is correct
13 Correct 34 ms 31736 KB Output is correct
14 Correct 33 ms 31756 KB Output is correct
15 Correct 33 ms 31736 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 76 ms 31880 KB Output is correct
2 Correct 65 ms 31876 KB Output is correct
3 Correct 67 ms 31876 KB Output is correct
4 Correct 123 ms 31880 KB Output is correct
5 Correct 63 ms 31872 KB Output is correct
6 Correct 129 ms 31868 KB Output is correct
7 Correct 54 ms 31872 KB Output is correct
8 Correct 73 ms 31948 KB Output is correct
9 Correct 35 ms 31816 KB Output is correct
10 Correct 65 ms 31876 KB Output is correct

Subtask #4
61.0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Correct 45 ms 31768 KB Output is correct
2 Correct 34 ms 31864 KB Output is correct
3 Correct 35 ms 31840 KB Output is correct
4 Correct 34 ms 31864 KB Output is correct
5 Correct 34 ms 31732 KB Output is correct
6 Correct 34 ms 31840 KB Output is correct
7 Correct 43 ms 31844 KB Output is correct
8 Correct 34 ms 31740 KB Output is correct
9 Correct 33 ms 31708 KB Output is correct
10 Correct 34 ms 31676 KB Output is correct
11 Correct 33 ms 31708 KB Output is correct
12 Correct 34 ms 31708 KB Output is correct
13 Correct 34 ms 31760 KB Output is correct
14 Correct 33 ms 31708 KB Output is correct
15 Correct 34 ms 31752 KB Output is correct
16 Correct 34 ms 31708 KB Output is correct
17 Correct 34 ms 31704 KB Output is correct
18 Correct 34 ms 31644 KB Output is correct
19 Correct 34 ms 31652 KB Output is correct
20 Correct 34 ms 31688 KB Output is correct
21 Correct 34 ms 31736 KB Output is correct
22 Correct 33 ms 31756 KB Output is correct
23 Correct 33 ms 31736 KB Output is correct
24 Correct 76 ms 31880 KB Output is correct
25 Correct 65 ms 31876 KB Output is correct
26 Correct 67 ms 31876 KB Output is correct
27 Correct 123 ms 31880 KB Output is correct
28 Correct 63 ms 31872 KB Output is correct
29 Correct 129 ms 31868 KB Output is correct
30 Correct 54 ms 31872 KB Output is correct
31 Correct 73 ms 31948 KB Output is correct
32 Correct 35 ms 31816 KB Output is correct
33 Correct 65 ms 31876 KB Output is correct
34 Correct 125 ms 31880 KB Output is correct
35 Correct 74 ms 31860 KB Output is correct
36 Correct 97 ms 31872 KB Output is correct
37 Correct 144 ms 31876 KB Output is correct
38 Correct 52 ms 31816 KB Output is correct
39 Correct 114 ms 31736 KB Output is correct
40 Correct 50 ms 31836 KB Output is correct
41 Correct 104 ms 31868 KB Output is correct
42 Correct 122 ms 31872 KB Output is correct
43 Correct 116 ms 31864 KB Output is correct
44 Correct 112 ms 31836 KB Output is correct
45 Correct 69 ms 31864 KB Output is correct
46 Correct 113 ms 31864 KB Output is correct
47 Correct 115 ms 31864 KB Output is correct
48 Correct 88 ms 31896 KB Output is correct
49 Correct 39 ms 31868 KB Output is correct
50 Correct 126 ms 31872 KB Output is correct
51 Correct 86 ms 31864 KB Output is correct
52 Correct 98 ms 31864 KB Output is correct
53 Correct 133 ms 31908 KB Output is correct
54 Correct 73 ms 31804 KB Output is correct
55 Correct 128 ms 31944 KB Output is correct
56 Correct 129 ms 31864 KB Output is correct
57 Correct 47 ms 31864 KB Output is correct
58 Correct 125 ms 31972 KB Output is correct