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Submission #648383

# Submission time Handle Problem Language Result Execution time Memory
648383 2022-10-06T09:50:03 Z morasha3 Miners (IOI07_miners) C++17
100 / 100
 205 ms 210312 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef   double ld;
const ll mod=1e9+7;
#define endl '\n'
ll n;
string s;
ll dp[100007][4][4][4][4];

ll fun(ll idx,ll p,ll p1,ll p2,ll p3)
{
    if(idx==n)
    {
        return 0;
    }

    if(dp[idx][p][p1][p2][p3]!=-1)return dp[idx][p][p1][p2][p3];
    ll o=1;
    if(s[idx]=='F')o=3;
    else if(s[idx]=='B')o=2;
    ll ans=1;
    if(p!=0&&p!=o)ans++;
    if(p1!=0&&p1!=o)ans++;
    if(p1!=0&&p1==p&&o!=p)ans--;
    ll c1=fun(idx+1,o,p,p2,p3)+ans;
    if(idx==2)
    {
        ll o1=p;
        p=0;
        p=o1;
    }
    ans=1;
    if(p2!=0&&p2!=o)ans++;
    if(p3!=0&&p3!=o)ans++;
    if(p2!=0&&p2==p3&&o!=p2)ans--;
    ll c2=fun(idx+1,p,p1,o,p2)+ans;
    return dp[idx][p][p1][p2][p3]=max(c1,c2);
}

int32_t main()
{
    //freopen("jumping.in","r",stdin);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>s;
    memset(dp,-1,sizeof dp);
    cout<<fun(0,0,0,0,0);
    return 0;

}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 200652 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 77 ms 200652 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 200760 KB Output is correct

Subtask #4
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 77 ms 200632 KB Output is correct

Subtask #5
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 200652 KB Output is correct

Subtask #6
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 200684 KB Output is correct

Subtask #7
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 75 ms 200800 KB Output is correct

Subtask #8
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 201236 KB Output is correct

Subtask #9
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 88 ms 201608 KB Output is correct

Subtask #10
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 203124 KB Output is correct

Subtask #11
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 143 ms 208012 KB Output is correct

Subtask #12
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 205 ms 210312 KB Output is correct