Submission #967485

#	Time	Username	Problem	Language	Result	Execution time	Memory
967485		Neco_arc	Simple game (IZhO17_game)	C++17	100 / 100	41 ms	9224 KiB

game

#include <bits/stdc++.h>

#define ll long long
#define all(x) x.begin(), x.end()
#define Neco "Simple game"
#define resp(x) sort(all(x)), x.resize(unique(all(x)) - x.begin())
#define getbit(x,i) ((x >> i)&1)
#define _left id * 2, l, mid
#define _right id * 2 + 1, mid + 1, r
#define cntbit(x) __builtin_popcountll(x)
#define fi(i, a, b) for(int i = a; i <= b; i++)
#define fid(i, a, b) for(int i = a; i >= b; i--)
#define maxn (int) 1e6 + 7

using namespace std;

const ll mod = 1e9 + 7; //972663749
const ll base = 911382323;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

ll GetRandom(ll l, ll r)
{
    return uniform_int_distribution<ll> (l, r)(rng);
}

int n, q;
int a[maxn];

struct BIT {
    int bit[maxn];
    void update(int l, int r, int val) {
        if(l > r) swap(l, r);
        for(; l < maxn; l += (l & -l)) bit[l] += val;
        for(++r; r < maxn; r += (r & -r)) bit[r] -= val;
    }

    int get(int x, int ans = 0) {
        for(; x > 0; x -= (x & -x)) ans += bit[x];
        return ans;
    }
} Bit;

void solve()
{

    cin >> n >> q;
    fi(i, 1, n) {
        cin >> a[i];
        if(i > 1) Bit.update(a[i - 1], a[i], 1);
    }

    fi(i, 1, q) {
        int type, x, y;
        cin >> type >> x;

        if(type == 2) cout << Bit.get(x) << '\n';
        else {
            cin >> y;
            if(x > 1) Bit.update(a[x - 1], a[x], -1);
            if(x < n) Bit.update(a[x + 1], a[x], -1);

            a[x] = y;
            if(x > 1) Bit.update(a[x - 1], a[x], 1);
            if(x < n) Bit.update(a[x + 1], a[x], 1);
        }

    }


}


int main()
{

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    if(fopen(Neco".inp", "r")) {
        freopen(Neco".inp", "r", stdin);
        freopen(Neco".out", "w", stdout);
    }


    int nTest = 1;
//    cin >> nTest;


    while(nTest--)
    {
        solve();
    }


    return 0;
}

Compilation message (stderr)

game.cpp: In function 'int main()':
game.cpp:82:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |         freopen(Neco".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
game.cpp:83:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |         freopen(Neco".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 27 / 27
• Subtask 3: 51 / 51