Submission #568566

#	Time	Username	Problem	Language	Result	Execution time	Memory
568566		FEDIKUS	Snake Escaping (JOI18_snake_escaping)	C++17	100 / 100	1368 ms	47440 KiB

snake_escaping

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define xx first
#define yy second
#define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
#define fb(i,s,f) for(ll (i)=s-1;(i)>=f;(i)--)
#define ffi(i,s,f) for(ll (i)=s;(i)<=(f);(i)++)
#define fbi(i,s,f) for(ll (i)=s;(i)>=(f);(i)--)
#define srt(a) sort(a.begin(),a.end());
#define srtg(a,ll) sort(a.begin(),a.end(),greater<ll>())
#define lb(a,x) lower_bound(a.begin(),a.end(),x)
#define ub(a,x) upper_bound(a.begin(),a.end(),x)
#define fnd(a,x) find(a.begin(),a.end(),x)
#define ios ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef long long ll;
typedef pair<ll,ll> pii;
typedef pair<ll,ll> pll;
typedef string str;

const ll logg=20;

ll sub[1LL<<logg],sup[1LL<<logg];

ll com(ll a){
    return a^((1LL<<logg)-1);
}

void solve(){
    ll l,q;
    cin>>l>>q;
    str s;
    cin>>s;
    ff(mask,0,(1LL<<l)) sub[mask]=s[mask]-'0';
    ff(i,0,logg) ff(mask,0,(1LL<<logg)) if((1LL<<i)&mask) sub[mask]+=sub[mask^(1LL<<i)];
    ff(mask,0,(1LL<<l)) sup[mask]=s[mask]-'0';
    ff(i,0,logg) ff(mask,0,(1LL<<logg)) if((1LL<<i)&com(mask)) sup[mask]+=sup[mask^(1LL<<i)];
    while(q--){
        str t;
        cin>>t;
        ll one=0,zero=0;
        for(char i:t) if(i=='0') zero++; else if(i=='1') one++;
        ll res=0;
        if(one<=6){
            ll mask=0;
            ll nfixed=0;
            ff(i,0,l){
                if(t[i]=='1') mask+=(1LL<<(l-i-1));
                if(t[i]=='?') nfixed+=(1LL<<(l-i-1));
            }
            for(ll submask=mask;;submask=(submask-1)&mask){
                if((one-__builtin_popcount(submask|nfixed))&1) res-=sub[submask|nfixed];
                else res+=sub[submask|nfixed];
                if(submask==0) break;
            }
        }else if(zero<=6){
            ll mask=0;
            ll ones=0;
            ff(i,0,l){
                if(t[i]=='0') mask+=(1LL<<(l-i-1));
                if(t[i]=='1') ones+=(1LL<<(l-i-1));
            }
            for(ll submask=mask;;submask=(submask-1)&mask){
                if(__builtin_popcount(submask)&1) res-=sup[submask|ones];
                else res+=sup[submask|ones];
                if(submask==0) break;
            }
        }else{
            ll mask=0;
            ll fixed=0;
            ff(i,0,l){
                if(t[i]=='?') mask+=(1LL<<(l-i-1));
                else if(t[i]=='1') fixed+=(1LL<<(l-i-1));
            }
            for(ll submask=mask;;submask=(submask-1)&mask){
                res+=s[submask|fixed]-'0';
                if(submask==0) break;
            }
        }
        cout<<abs(res)<<"\n";
    }
}

int main(){
    ios;
    ll t=1;
    //cin>>t;
    while(t--) solve();
    return 0;
}

Compilation message (stderr)

snake_escaping.cpp: In function 'void solve()':
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'mask' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:40:5: note: in expansion of macro 'ff'
   40 |     ff(mask,0,(1LL<<l)) sub[mask]=s[mask]-'0';
      |     ^~
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:41:5: note: in expansion of macro 'ff'
   41 |     ff(i,0,logg) ff(mask,0,(1LL<<logg)) if((1LL<<i)&mask) sub[mask]+=sub[mask^(1LL<<i)];
      |     ^~
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'mask' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:41:18: note: in expansion of macro 'ff'
   41 |     ff(i,0,logg) ff(mask,0,(1LL<<logg)) if((1LL<<i)&mask) sub[mask]+=sub[mask^(1LL<<i)];
      |                  ^~
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'mask' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:42:5: note: in expansion of macro 'ff'
   42 |     ff(mask,0,(1LL<<l)) sup[mask]=s[mask]-'0';
      |     ^~
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:43:5: note: in expansion of macro 'ff'
   43 |     ff(i,0,logg) ff(mask,0,(1LL<<logg)) if((1LL<<i)&com(mask)) sup[mask]+=sup[mask^(1LL<<i)];
      |     ^~
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'mask' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:43:18: note: in expansion of macro 'ff'
   43 |     ff(i,0,logg) ff(mask,0,(1LL<<logg)) if((1LL<<i)&com(mask)) sup[mask]+=sup[mask^(1LL<<i)];
      |                  ^~
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:53:13: note: in expansion of macro 'ff'
   53 |             ff(i,0,l){
      |             ^~
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:65:13: note: in expansion of macro 'ff'
   65 |             ff(i,0,l){
      |             ^~
snake_escaping.cpp:9:26: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    9 | #define ff(i,s,f) for(ll (i)=s;(i)<(f);(i)++)
      |                          ^
snake_escaping.cpp:77:13: note: in expansion of macro 'ff'
   77 |             ff(i,0,l){
      |             ^~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 10 / 10
• Subtask 4: 53 / 53
• Subtask 5: 25 / 25