Submission #862503

#	Time	Username	Problem	Language	Result	Execution time	Memory
862503		JakobZorz	Miners (IOI07_miners)	C++14	100 / 100	148 ms	101600 KiB

miners

#include<iostream>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
#include<limits.h>
#include<math.h>
#include<map>
#include<set>
#include<unordered_map>
#include<unordered_set>
#include<iomanip>
typedef long long ll;
typedef long double ld;
using namespace std;
const int MOD=1e9+7;
//typedef pair<ll,ll>Point;
//typedef pair<ll,ll>Line;
//#define x first
//#define y second

int n;
string str;

int get_val(int a,int b,int c){
    if(a==0&&b==0)
        return 1;
    
    if(a==0)
        return b!=c?2:1;
    
    int res=3;
    if(a==b||b==c||a==c)
        res=2;
    if(a==b&&b==c)
        res=1;
    return res;
}

bool dpt[4][4][4][4][100000];
int dp[4][4][4][4][100000];
int get(int m1,int m2,int m3,int m4,int i){
    if(i==n)
        return 0;
    if(dpt[m1][m2][m3][m4][i])
        return dp[m1][m2][m3][m4][i];
    
    int curr=0;
    if(str[i]=='M')
        curr=1;
    if(str[i]=='B')
        curr=2;
    if(str[i]=='F')
        curr=3;
    
    int val1=get(m2,curr,m3,m4,i+1);
    int val2=get_val(m1,m2,curr);
    
    int r1=get(m2,curr,m3,m4,i+1)+get_val(m1,m2,curr);
    
    int r2=get(m1,m2,m4,curr,i+1)+get_val(m3,m4,curr);
    
    dpt[m1][m2][m3][m4][i]=true;
    dp[m1][m2][m3][m4][i]=max(r1,r2);
    
    return max(r1,r2);
}

int main(){
    ios::sync_with_stdio(false);
    cout.tie(NULL);
    cin.tie(NULL);
    
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    
    cin>>n;
    cin>>str;
    cout<<get(0,0,0,0,0)<<"\n";
    
    return 0;
}

Compilation message (stderr)

miners.cpp: In function 'int get(int, int, int, int, int)':
miners.cpp:56:9: warning: unused variable 'val1' [-Wunused-variable]
   56 |     int val1=get(m2,curr,m3,m4,i+1);
      |         ^~~~
miners.cpp:57:9: warning: unused variable 'val2' [-Wunused-variable]
   57 |     int val2=get_val(m1,m2,curr);
      |         ^~~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 7 / 7
• Subtask 7: 8 / 8
• Subtask 8: 8 / 8
• Subtask 9: 8 / 8
• Subtask 10: 8 / 8
• Subtask 11: 8 / 8
• Subtask 12: 8 / 8