oj.uz

Submission #519784

# Submission time Handle Problem Language Result Execution time Memory
519784 2022-01-27T10:32:51 Z Dasha_Gnedko Simple game (IZhO17_game) C++17
0 / 100
 38 ms 336 KB 
#include <bits/stdc++.h>

//#include <ext/pb_ds/detail/standard_policies.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx2")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")

using namespace std;

//using namespace __gnu_pbds;
//template <typename T> using ordered_set = tree <T, null_type, less < T >, rb_tree_tag, tree_order_statistics_node_update>;

mt19937 gen(time(0));

#define ll long long
#define ld long double
#define pb push_back
#define F first
#define S second
#define TIME clock() * 1.0 / CLOCKS_PER_SEC
#define sz(a) int32_t(a.size())
#define endl '\n'
//#define int long long

const int N = 1e6 + 100;
const int M = 31;
const int mod = 1e9 + 7;
const ll inf = 1e18 + 7;

struct Fenwick
{
    int f[N];

    void upd(int i, int zn)
    {
        for(; i < N; i = (i | (i + 1)))
            f[i] += zn;
    }

    int get(int i)
    {
        int ans = 0;
        for(; i >= 0; i = (i & (i + 1)) - 1)
            ans += f[i];
        return ans;
    }
};

Fenwick f;
int a[N];

void upd(int x, int y, int zn)
{
    if (x > y) swap(x, y);
    f.upd(x, zn);
    f.upd(y, -zn);
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
    freopen("game.in", "r", stdin);
    freopen("game.out", "w", stdout);
#endif // LOCAL

    int n, q;
    cin >> n >> q;
    for(int i = 0; i < n; i++)
    {
        cin >> a[i];
        if (i) upd(a[i - 1], a[i], 1);
    }
    while (q--)
    {
        int type;
        cin >> type;
        if (type == 1)
        {
            int i, x;
            cin >> i >> x;
            i--;
            if (i) upd(a[i], a[i - 1], -1);
            if (i + 1 < n) upd(a[i], a[i + 1], -1);
            a[i] = x;
            if (i) upd(a[i], a[i - 1], 1);
            if (i + 1 < n) upd(a[i], a[i + 1], 1);
        }
        if (type == 2)
        {
            int x;
            cin >> x;
            cout << f.get(x) << endl;
        }
    }
}

Compilation message

game.cpp: In function 'int32_t main()':
game.cpp:72:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |     freopen("game.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
game.cpp:73:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |     freopen("game.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 38 ms 336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 38 ms 336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 51.0

# Verdict Execution time Memory Grader output
1 Incorrect 38 ms 336 KB Output isn't correct
2 Halted 0 ms 0 KB -