oj.uz

Submission #1095955

# Submission time Handle Problem Language Result Execution time Memory
1095955 2024-10-03T13:08:30 Z phamducluong Snake Escaping (JOI18_snake_escaping) C++14
0 / 100
 1 ms 348 KB 
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>

//using namespace __gnu_pbds;
using namespace std;
//typedef tree<int,null_type,less_equal<int>,rb_tree_tag, tree_order_statistics_node_update> ordered_set;
#define Sakura_chan    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define mem(a,x)       memset(a,x,sizeof(a))
#define fast(s)        s.reserve(2000); s.max_load_factor(0.5);
#define int             long long
#define F              first
#define S              second
#define pb             push_back
#define ins            insert
#define pii            pair <long long, long long>
#define vpii           vector <pii>
#define sz             size()
#define all(p)         p.begin(), p.end()
#define For(i,a,b)     for(int i=a; i<=b; ++i)
#define rFor(i,a,b)    for(int i=a; i>=b; --i)
#define Auto(it,a)     for(auto it: a)
const int mod=1e9+7;
const int N=1e6+5, M=20;
int n, q, f[1<<M], g[1<<M], cnt[1<<M];
void file()
{
    #define task "snakes"
    if(fopen(task".inp","r"))
    {
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    Sakura_chan;
}
void Solve()
{
    cin>>n>>q;
    string s, t; cin>>s;
    for(int i=0; i<(1<<n); ++i) f[i]=g[i]=(s[i]-'0');
    for(int i=0; i<n; ++i) for(int mask=0; mask<(1<<n); ++mask) if(mask&(1<<i)) {f[mask]+=f[mask^(1<<i)]; g[mask^(1<<i)]+=g[mask];}
    for(int i=0; i<(1<<n); ++i) cnt[i]=__builtin_popcount(i);
    while(q--)
    {
        cin>>t;
        reverse(all(t));
        int a=0, b=0, c=0, res=0;
        for(int i=0; i<n; ++i)
        {
            if(t[i]=='?') a|=(1<<i);
            else if(t[i]=='0') b|=(1<<i);
            else c|=(1<<i);
        }
        if(cnt[a]<=n/3)
        {
            for(int mask=a;;mask=(mask-1)&a)
            {
                res+=s[c|mask]-'0';
                if(mask==0) break;
            }
        }
        else if(cnt[b]<=n/3)
        {
            for(int mask=b;;mask=(mask-1)&b)
            {
                if(cnt[mask]&1) res-=g[c|mask];
                else res+=g[c|mask];
                if(mask==0) break;
            }
        }
        else
        {
            for(int mask=c;;mask=(mask-1)&c)
            {
                if(cnt[mask]&1) res-=f[c|mask];
                else res+=f[c|mask];
                if(mask==0) break;
            }
        }
        cout<<res<<"\n";
    }
}

main()
{
    file();
    Solve();
    return 0;
}

Compilation message

snake_escaping.cpp:83:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   83 | main()
      | ^~~~
snake_escaping.cpp: In function 'void file()':
snake_escaping.cpp:30:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -