Submission #230171

#	Time	Username	Problem	Language	Result	Execution time	Memory
230171		CaroLinda	Miners (IOI07_miners)	C++14	100 / 100	262 ms	100728 KiB

miners

#include <bits/stdc++.h>

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")

#define mkt make_tuple
#define debug printf
#define all(x) x.begin(),x.end()
#define lp(i,a,b) for(int i = a ; i< b ; i++)
#define ss second
#define ff first
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define mk make_pair

const int MAXN = 1e5+10 ;

using namespace std ;

int N ;
bool freq[4] ;
int dp[MAXN][4][4][4][4] ;
char str[MAXN] ;

int get(char c)
{
    if( c == 'B' ) return 1 ;
    return c == 'F' ? 2 : 3 ;
}

int _count()
{
    int cnt = 0 ;
    lp(i,1,4) cnt += freq[i] ;
    return cnt ;
}

int main()
{
    scanf("%d %s", &N , str ) ;

    for(int i = N-1 ; i >= 0 ; i-- )
        for(int j1 = 0 ; j1 < 4 ; j1 ++ )
            for(int j2 = 0 ; j2 < 4 ; j2 ++ )
                for(int g1 = 0 ; g1 < 4 ; g1 ++ )
                    for(int g2 = 0 ; g2 < 4 ; g2 ++ )
                    {
                        int &ptr = dp[i][j1][j2][g1][g2] ;
                        int x = get(str[i]) ;

                        freq[x] = true ;

                        //Decidi dar pro primeiro
                        freq[j1] = freq[j2] = true ;
                        ptr = max(ptr, _count() + dp[i+1][j2][x][g1][g2] ) ;
                        freq[j1] = freq[j2] = false ;

                        freq[x] = true ;

                        //Decidi dar pro segundo
                        freq[g1] = freq[g2] = true ;
                        ptr = max(ptr, _count() + dp[i+1][j1][j2][g2][x]) ;
                        freq[g1] = freq[g2] = false ;

                        freq[x] = false ;

                    }

    printf("%d\n" , dp[0][0][0][0][0] ) ;

}

Compilation message (stderr)

miners.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("O3")
 
miners.cpp:5:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("unroll-loops")
 
miners.cpp: In function 'int main()':
miners.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %s", &N , str ) ;
     ~~~~~^~~~~~~~~~~~~~~~~~~~

• 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