oj.uz

Submission #843647

# Submission time Handle Problem Language Result Execution time Memory
843647 2023-09-04T10:38:13 Z ZeroCool Miners (IOI07_miners) C++14
100 / 100
 652 ms 254800 KB 
#include <bits/stdc++.h>

using namespace std;

#define int long long

#define pb push_back
#define mp make_pair
#define mt make_tuple
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()

using ll = long long;
using ld = long double;
 
void solve(int T);
void pre();
 
const int N = 1e5 + 5;
const int M = 405;
const int SQRT = 500;
const int LOG = 20;
const int INF = 1e18;
const int MOD = 1e9+7;
const ld EPS = 1e-9;

void pre(){
	#ifdef ONLINE_JUDGE
    ios::sync_with_stdio(false);
    cin.tie(0);
	#endif
	
}

int32_t main(){
	pre();
	int tt = 1;
	//cin>>tt;
	for(int i = 1;i<=tt;i++){
		cerr<<"Case "<<i<<": "<<endl;
		solve(i);
	}
    return 0;
}

int n;
string s;

int dp[N][4][4][4][4];
bool vis[N][4][4][4][4];

int f(int i,int a,int b,int c,int d){
    if(i == n)return 0;
    if(vis[i][a][b][c][d])return dp[i][a][b][c][d];
    vis[i][a][b][c][d] = true;

    int x = 0;

    if(s[i] == 'M')x = 1;
    else if(s[i] =='F')x = 2;
    else x = 3;

    set<int> s;
    s.insert(a);
    s.insert(b);
    s.insert(x);
    int unq1 = s.size();
    if(a == 0 || b == 0)unq1--;
    s.clear();
    s.insert(c);
    s.insert(d);
    s.insert(x);
    int unq2 = s.size();
    if(c == 0 || d == 0)unq2--;

    int ans = max(f(i+1,b,x,c,d) + unq1, f(i+1,a,b,d,x) + unq2);
    dp[i][a][b][c][d] = ans;
    return ans;

}

void solve(int T){
    cin>>n>>s;

    cout<<f(0,0,0,0,0)<<endl;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2472 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct

Subtask #4
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct

Subtask #5
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct

Subtask #6
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct

Subtask #7
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4952 KB Output is correct

Subtask #8
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 15196 KB Output is correct

Subtask #9
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 26388 KB Output is correct

Subtask #10
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 153 ms 64848 KB Output is correct

Subtask #11
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 290 ms 192392 KB Output is correct

Subtask #12
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 652 ms 254800 KB Output is correct