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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#166846#1261. Invucup-team1600#AC ✓98ms133920kbC++203.8kb2023-09-06 19:20:182023-09-06 19:20:19

Judging History

This is the latest submission verdict.

  • [2023-09-06 19:20:19]
  • Judged
  • Verdict: AC
  • Time: 98ms
  • Memory: 133920kb
  • [2023-09-06 19:20:18]
  • Submitted

answer

//#pragma GCC optimize("Ofast", "unroll-loops")
//#pragma GCC target("sse", "sse2", "sse3", "ssse3", "sse4")
#ifdef LOCAL
#include <iostream>
#include <cmath>
#include <algorithm>
#include <stdio.h>
#include <cstdint>
#include <cstring>
#include <string>
#include <cstdlib>
#include <vector>
#include <bitset>
#include <map>
#include <queue>
#include <ctime>
#include <stack>
#include <set>
#include <list>
#include <random>
#include <deque>
#include <functional>
#include <iomanip>
#include <sstream>
#include <fstream>
#include <complex>
#include <numeric>
#include <cassert>
#include <array>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <thread>
#else
#include <bits/stdc++.h>
#endif

#define all(a) a.begin(),a.end()
#define len(a) (int)(a.size())
#define mp make_pair
#define pb push_back
#define fir first
#define sec second
#define fi first
#define se second

using namespace std;

typedef pair<int, int> pii;
typedef long long ll;
typedef long double ld;

template<typename T>
inline bool umin(T &a, T b) {
    if (b < a) {
        a = b;
        return true;
    }
    return false;
}

template<typename T>
inline bool umax(T &a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

#ifdef LOCAL
#define D for (bool _FLAG = true; _FLAG; _FLAG = false)
#define LOG(...) print(#__VA_ARGS__" ::", __VA_ARGS__) << endl
template <class ...Ts> auto &print(Ts ...ts) { return ((cerr << ts << " "), ...); }
#else
#define D while (false)
#define LOG(...)
#endif // LOCAL

const int max_n = 511, inf = 1000111222;


bool dp[max_n][max_n * max_n / 2] = {};
bool pref[max_n][max_n * max_n / 2] = {};

//inline int solve (int n, int k) {
//    if (k > n * (n - 1) / 2) {
//        return 0;
//    }
//    if (k < 0 || n < 0) {
//        return 0;
//    }
//    if (n == 0 && k > 0) {
//        return 0;
//    }
//    if (n == 0 && k == 0) {
//        return 1;
//    }
//    LOG(n, k);
//    if (calc[n][k]) {
//        return dp[n][k];
//    }
//    calc[n][k] = true;
//    dp[n][k] = solve(n - 1, k);
//    for (int i = 1; i < n; i++) {
//        dp[n][k] ^= solve(n - 2, k - (n - i + n - i - 1));
//    }
//    return dp[n][k];
//}


int main() {
//    freopen("input.txt", "r", stdin);
//    freopen("output.txt", "w", stdout);

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n, k;
    cin >> n >> k;
//    for (int i = 1; i <= n; i++) {
//        for (int j = 0; j <= k; j++) {
//            solve(i, j);
////            cout << solve(i, j) << ' ';
//        }
////        cout << '\n';
//    }
    dp[0][0] = 1;
    pref[0][0] = 1;
    for (int j = 0; j <= n * (n - 1) / 2; j += 2) {
        pref[0][j] = 1;
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= n * (n - 1) / 2; j++) {
            dp[i][j] = dp[i - 1][j];
            if (i >= 2) {
                int st = j - (i - (i - 1) + i - (i - 1) - 1);
                if (st >= 0) {
                    dp[i][j] ^= pref[i - 2][st];
                    int l = j - (i - (1) + i - (1) - 1);
                    if (l - 2 >= 0) {
                        dp[i][j] ^= pref[i - 2][l - 2];
                    }
                }
//                for (int k = i - 1; k > 0 && j - (i - k + i - k - 1) >= 0; k--) {
//                    dp[i][j] ^= dp[i - 2][j - (i - k + i - k - 1)];
//                }
            }
            pref[i][j] = dp[i][j];
            if (j >= 2) {
                pref[i][j] ^= pref[i][j - 2];
            }
        }
    }
    cout << dp[n][k] << '\n';
//    for (int i = 1; i <= n; i++) {
//        for (int j = 0; j <= k; j++) {
//            cout << dp[i][j] << ' ';
//        }
//        cout << '\n';
//    }
//    for (int i = 1; i <= n; i++) {
//
//    }
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 3ms
memory: 9780kb

input:

4 1

output:

1

result:

ok answer is '1'

Test #2:

score: 0
Accepted
time: 1ms
memory: 7844kb

input:

10 21

output:

0

result:

ok answer is '0'

Test #3:

score: 0
Accepted
time: 98ms
memory: 132668kb

input:

500 124331

output:

0

result:

ok answer is '0'

Test #4:

score: 0
Accepted
time: 2ms
memory: 9872kb

input:

20 122

output:

1

result:

ok answer is '1'

Test #5:

score: 0
Accepted
time: 3ms
memory: 32364kb

input:

100 999

output:

0

result:

ok answer is '0'

Test #6:

score: 0
Accepted
time: 90ms
memory: 133544kb

input:

500 100001

output:

1

result:

ok answer is '1'

Test #7:

score: 0
Accepted
time: 0ms
memory: 7756kb

input:

5 0

output:

1

result:

ok answer is '1'

Test #8:

score: 0
Accepted
time: 1ms
memory: 5692kb

input:

5 1

output:

0

result:

ok answer is '0'

Test #9:

score: 0
Accepted
time: 1ms
memory: 5652kb

input:

5 2

output:

1

result:

ok answer is '1'

Test #10:

score: 0
Accepted
time: 0ms
memory: 7768kb

input:

5 3

output:

1

result:

ok answer is '1'

Test #11:

score: 0
Accepted
time: 1ms
memory: 5656kb

input:

5 4

output:

0

result:

ok answer is '0'

Test #12:

score: 0
Accepted
time: 1ms
memory: 7748kb

input:

5 5

output:

0

result:

ok answer is '0'

Test #13:

score: 0
Accepted
time: 1ms
memory: 5764kb

input:

5 6

output:

0

result:

ok answer is '0'

Test #14:

score: 0
Accepted
time: 0ms
memory: 5772kb

input:

5 7

output:

1

result:

ok answer is '1'

Test #15:

score: 0
Accepted
time: 1ms
memory: 5692kb

input:

5 8

output:

1

result:

ok answer is '1'

Test #16:

score: 0
Accepted
time: 1ms
memory: 7756kb

input:

5 9

output:

0

result:

ok answer is '0'

Test #17:

score: 0
Accepted
time: 1ms
memory: 7776kb

input:

5 10

output:

1

result:

ok answer is '1'

Test #18:

score: 0
Accepted
time: 94ms
memory: 133920kb

input:

500 73732

output:

1

result:

ok answer is '1'

Test #19:

score: 0
Accepted
time: 93ms
memory: 132772kb

input:

499 21121

output:

1

result:

ok answer is '1'

Test #20:

score: 0
Accepted
time: 88ms
memory: 132576kb

input:

499 100000

output:

0

result:

ok answer is '0'

Test #21:

score: 0
Accepted
time: 94ms
memory: 132504kb

input:

499 62262

output:

1

result:

ok answer is '1'

Test #22:

score: 0
Accepted
time: 88ms
memory: 133660kb

input:

499 23432

output:

1

result:

ok answer is '1'

Test #23:

score: 0
Accepted
time: 89ms
memory: 133452kb

input:

500 12321

output:

0

result:

ok answer is '0'

Test #24:

score: 0
Accepted
time: 91ms
memory: 132584kb

input:

500 60000

output:

1

result:

ok answer is '1'

Test #25:

score: 0
Accepted
time: 89ms
memory: 132312kb

input:

498 7498

output:

1

result:

ok answer is '1'

Test #26:

score: 0
Accepted
time: 87ms
memory: 133688kb

input:

498 76111

output:

1

result:

ok answer is '1'

Test #27:

score: 0
Accepted
time: 58ms
memory: 111244kb

input:

414 41414

output:

1

result:

ok answer is '1'

Test #28:

score: 0
Accepted
time: 55ms
memory: 112836kb

input:

422 42224

output:

1

result:

ok answer is '1'

Test #29:

score: 0
Accepted
time: 23ms
memory: 91720kb

input:

333 33333

output:

1

result:

ok answer is '1'

Test #30:

score: 0
Accepted
time: 90ms
memory: 132700kb

input:

500 51515

output:

1

result:

ok answer is '1'

Test #31:

score: 0
Accepted
time: 43ms
memory: 108468kb

input:

393 21222

output:

1

result:

ok answer is '1'

Test #32:

score: 0
Accepted
time: 96ms
memory: 133252kb

input:

500 124750

output:

1

result:

ok answer is '1'

Test #33:

score: 0
Accepted
time: 91ms
memory: 132784kb

input:

500 124749

output:

1

result:

ok answer is '1'

Test #34:

score: 0
Accepted
time: 98ms
memory: 133916kb

input:

500 0

output:

1

result:

ok answer is '1'

Test #35:

score: 0
Accepted
time: 95ms
memory: 132640kb

input:

500 1

output:

1

result:

ok answer is '1'

Test #36:

score: 0
Accepted
time: 2ms
memory: 5636kb

input:

1 0

output:

1

result:

ok answer is '1'