oj.uz

Submission #636057

# Submission time Handle Problem Language Result Execution time Memory
636057 2022-08-27T20:50:48 Z Bruteforceman Snake Escaping (JOI18_snake_escaping) C++11
22 / 100
 2000 ms 20108 KB 
    #pragma GCC optimize("Ofast")
    #pragma GCC target("avx,avx2,fma")
    #include <bits/stdc++.h>
    #define taskname "test"
    #define fi first
    #define se second
    #define pb push_back
    #define faster ios_base::sync_with_stdio(0); cin.tie(0);
    using namespace std;
    using ll = long long;
    using ull = unsigned ll;
    using ld = long double;
    using pii = pair <int, int>;
    using pil = pair <int, ll>;
    using pli = pair <ll, int>;
    using pll = pair <ll, ll>;
    mt19937 Rand(chrono::steady_clock::now().time_since_epoch().count());
     
    ll min(const ll &a, const ll &b){
        return (a < b) ? a : b;
    }
     
    ll max(const ll &a, const ll &b){
        return (a > b) ? a : b;
    }
     
    //const ll Mod = 1000000007;
    //const ll Mod2 = 999999999989;
    //only use when required
    const int maxN = 20;
     
    int n, q;
    string s, t;
    int dp[(1 << maxN) + 5];
    int f[(1 << maxN) + 5];
     
    void WriteInt(int x)
    {
        if (x > 9)
            WriteInt(x / 10);
        putchar(x % 10 + '0');
    }
     
    inline int inv(int i){
        return ((1 << n) - 1) ^ i;
    }
     
     
    void Init(){
        cin >> n >> q >> s;
        for (int i = 0; i < int(s.length()); ++i){
            dp[i] = s[i] - '0';
            f[inv(i)] = dp[i];
        }
        for (int i = 0; i < n; ++i){
            for (int j = 1; j < 1 << n; ++j){
                if (j & (1 << i)){
                    dp[j] += dp[j ^ (1 << i)];
                }
            }
        }
        for (int i = 0; i < n; ++i){
            for (int j = 0; j < 1 << n; ++j){
                if (j & (1 << i)){
                    f[j] += f[j ^ (1 << i)];
                }
            }
        }
        int x, y, z;
        int mask1, mask0, tem;
        while (q--){
            cin >> t;
            x = y = z = mask1 = mask0 = tem = 0;
            vector <int> val((1 << n) + 1, 0);
            reverse(t.begin(), t.end());
            for (int i = 0; i < n; ++i){
                if (t[i] == '0') ++x, mask0 ^= 1 << i;
                if (t[i] == '1') ++y, mask1 ^= 1 << i;
                if (t[i] == '?') ++z, tem ^= 1 << i;
            }
            if (z == min(min(x, y), z)){
                //brute all ?s
                int ans = s[mask1] - '0';
                for (int i = tem; i; i = (i - 1) & tem){
                    ans += s[i + mask1] - '0';
                }
                WriteInt(ans);
                putchar('\n');
            }
            else if (x == min(x, y)){
                int ans = -f[tem];
                for (int i = mask0; i; i = (i - 1) & mask0){
                    bool cnt = __builtin_parity(i);
                    if (cnt) ans += f[i + tem];
                    else ans -= f[i + tem];
                }
                ans = abs(ans);
                WriteInt(ans);
                putchar('\n');
            }
            else{
                int ans = -dp[tem];
                for (int i = mask1; i; i = (i - 1) & mask1){
                    bool cnt = __builtin_parity(i);
                    if (cnt) ans += dp[i + tem];
                    else ans -= dp[i + tem];
                }
                ans = abs(ans);
                WriteInt(ans);
                putchar('\n');
            }
        }
    }
     
     
    int main(){
        if (fopen(taskname".inp", "r")){
            freopen(taskname".inp", "r", stdin);
            //freopen(taskname".out", "w", stdout);
        }
        faster;
        ll tt = 1;
        //cin >> tt;
        while (tt--){
            Init();
        }
    }

Compilation message

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:118:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  118 |             freopen(taskname".inp", "r", stdin);
      |             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 296 ms 15168 KB Output is correct
12 Correct 296 ms 14700 KB Output is correct
13 Correct 399 ms 14132 KB Output is correct
14 Correct 304 ms 14044 KB Output is correct
15 Correct 345 ms 15120 KB Output is correct
16 Correct 308 ms 14352 KB Output is correct
17 Correct 340 ms 14136 KB Output is correct
18 Correct 269 ms 16120 KB Output is correct
19 Correct 287 ms 13072 KB Output is correct
20 Correct 299 ms 14772 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 296 ms 15168 KB Output is correct
12 Correct 296 ms 14700 KB Output is correct
13 Correct 399 ms 14132 KB Output is correct
14 Correct 304 ms 14044 KB Output is correct
15 Correct 345 ms 15120 KB Output is correct
16 Correct 308 ms 14352 KB Output is correct
17 Correct 340 ms 14136 KB Output is correct
18 Correct 269 ms 16120 KB Output is correct
19 Correct 287 ms 13072 KB Output is correct
20 Correct 299 ms 14772 KB Output is correct
21 Correct 999 ms 18188 KB Output is correct
22 Correct 965 ms 18272 KB Output is correct
23 Correct 1008 ms 17328 KB Output is correct
24 Correct 1048 ms 17104 KB Output is correct
25 Correct 1039 ms 19116 KB Output is correct
26 Correct 1022 ms 17592 KB Output is correct
27 Correct 1062 ms 17496 KB Output is correct
28 Correct 948 ms 20108 KB Output is correct
29 Correct 989 ms 16148 KB Output is correct
30 Correct 973 ms 18392 KB Output is correct
31 Correct 1025 ms 18192 KB Output is correct
32 Correct 1026 ms 18184 KB Output is correct
33 Correct 970 ms 17056 KB Output is correct
34 Correct 1089 ms 17172 KB Output is correct
35 Correct 1026 ms 17612 KB Output is correct
36 Correct 954 ms 16136 KB Output is correct
37 Correct 972 ms 18172 KB Output is correct
38 Correct 964 ms 16140 KB Output is correct
39 Correct 1008 ms 17260 KB Output is correct
40 Correct 1042 ms 17068 KB Output is correct

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Execution timed out 2077 ms 15416 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 296 ms 15168 KB Output is correct
12 Correct 296 ms 14700 KB Output is correct
13 Correct 399 ms 14132 KB Output is correct
14 Correct 304 ms 14044 KB Output is correct
15 Correct 345 ms 15120 KB Output is correct
16 Correct 308 ms 14352 KB Output is correct
17 Correct 340 ms 14136 KB Output is correct
18 Correct 269 ms 16120 KB Output is correct
19 Correct 287 ms 13072 KB Output is correct
20 Correct 299 ms 14772 KB Output is correct
21 Correct 999 ms 18188 KB Output is correct
22 Correct 965 ms 18272 KB Output is correct
23 Correct 1008 ms 17328 KB Output is correct
24 Correct 1048 ms 17104 KB Output is correct
25 Correct 1039 ms 19116 KB Output is correct
26 Correct 1022 ms 17592 KB Output is correct
27 Correct 1062 ms 17496 KB Output is correct
28 Correct 948 ms 20108 KB Output is correct
29 Correct 989 ms 16148 KB Output is correct
30 Correct 973 ms 18392 KB Output is correct
31 Correct 1025 ms 18192 KB Output is correct
32 Correct 1026 ms 18184 KB Output is correct
33 Correct 970 ms 17056 KB Output is correct
34 Correct 1089 ms 17172 KB Output is correct
35 Correct 1026 ms 17612 KB Output is correct
36 Correct 954 ms 16136 KB Output is correct
37 Correct 972 ms 18172 KB Output is correct
38 Correct 964 ms 16140 KB Output is correct
39 Correct 1008 ms 17260 KB Output is correct
40 Correct 1042 ms 17068 KB Output is correct
41 Execution timed out 2077 ms 15416 KB Time limit exceeded
42 Halted 0 ms 0 KB -