Submission #466860

#	Time	Username	Problem	Language	Result	Execution time	Memory
466860		julian33	Miners (IOI07_miners)	C++14	60 / 100	1591 ms	2636 KiB

miners

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {
    cerr<<vars<<" = ";
    string delim="";
    (...,(cerr<<delim<<values,delim=", "));
    cerr<<"\n";
}
#else
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {}
#endif

#define pb push_back
#define sz(x) (int)(x.size())
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
template<typename T> inline void maxa(T& a,T b){a=max(a,b);}
template<typename T> inline void mina(T& a,T b){a=min(a,b);} 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int mxN=1e5+5; //make sure this is right
const int mod=1e9+7;

int dp[2][1<<9][1<<9];
int id[1000];

int calc(int mask){return __builtin_popcount(mask%(1<<3)|(mask>>3)%(1<<3)|(mask>>6)%(1<<3));}

int main(){
    cin.sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    #ifdef LOCAL
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
    #endif

    int n; cin>>n;
    string s; cin>>s;
    id['M']=1<<6;
    id['F']=1<<7;
    id['B']=1<<8;
    memset(dp,-1,sizeof(dp));
    dp[1][0][0]=0;
    int ans=0;
    for(int i=0;i<n;i++){
        memset(dp[i&1],-1,sizeof(dp[i&1]));
        for(int j=0;j<(1<<9);j++){
            for(int k=0;k<(1<<9);k++){
                if(dp[i&1^1][j][k]==-1)
                    continue;
                int m1=(j>>3)|id[s[i]];
                int m2=(k>>3)|id[s[i]];
                maxa(dp[i&1][m1][k],dp[i&1^1][j][k]+calc(m1));
                maxa(dp[i&1][j][m2],dp[i&1^1][j][k]+calc(m2));
            }
        }
    }
    for(int j=0;j<(1<<9);j++){
        for(int k=0;k<(1<<9);k++){
            maxa(ans,dp[n&1^1][j][k]);
        }
    }
    cout<<ans<<"\n";
}

Compilation message (stderr)

miners.cpp: In function 'int main()':
miners.cpp:58:24: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   58 |                 if(dp[i&1^1][j][k]==-1)
      |                       ~^~
miners.cpp:60:38: warning: array subscript has type 'char' [-Wchar-subscripts]
   60 |                 int m1=(j>>3)|id[s[i]];
      |                                      ^
miners.cpp:61:38: warning: array subscript has type 'char' [-Wchar-subscripts]
   61 |                 int m2=(k>>3)|id[s[i]];
      |                                      ^
miners.cpp:62:41: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   62 |                 maxa(dp[i&1][m1][k],dp[i&1^1][j][k]+calc(m1));
      |                                        ~^~
miners.cpp:63:41: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   63 |                 maxa(dp[i&1][j][m2],dp[i&1^1][j][k]+calc(m2));
      |                                        ~^~
miners.cpp:69:26: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   69 |             maxa(ans,dp[n&1^1][j][k]);
      |                         ~^~

• 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: 0 / 8
• Subtask 9: 0 / 8
• Subtask 10: 0 / 8
• Subtask 11: 0 / 8
• Subtask 12: 0 / 8