제출 #967612

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
967612		Yang8on	Simple game (IZhO17_game)	C++14	100 / 100	50 ms	9052 KiB

game

#include <bits/stdc++.h>
#define Y8o "Simple game"
#define maxn 1000005
#define ll long long
#define pii pair<int, int>
#define gb(i, j) ((i >> j) & 1)

using namespace std;

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);
}
void iof() {
    if(fopen(Y8o".inp", "r"))
    {
        freopen(Y8o".inp", "r", stdin);
//        freopen(Y8o".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(NULL), cout.tie(NULL);
}
void ctime() {
    cerr << "\n" << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
}

const int mx = maxn - 5;

int n, Q;
int a[maxn];

int bit[maxn];
void update(int x, int val) { while(x <= mx) bit[x] += val, x += (x & -x); }
int get(int x) { int best = 0; while(x) best += bit[x], x -= (x & -x); return best; }

void update(int l, int r, int val)
{
    if(l > r) swap(l, r);
    update(l, +val), update(r + 1, -val);
}

void solve()
{
    cin >> n >> Q;
    for(int i = 1; i <= n; i ++) cin >> a[i];

    for(int i = 1; i <= n - 1; i ++)
        update(a[i], a[i + 1], +1);

    for(int i = 1, id, pos, H; i <= Q; i ++)
    {
        cin >> id;
        if(id == 1)
        {
            cin >> pos >> H;
            if(pos < n)
            {
                update(a[pos], a[pos + 1], -1);
                update(H, a[pos + 1], +1);
            }
            if(pos > 1)
            {
                update(a[pos - 1], a[pos], -1);
                update(H, a[pos - 1], +1);
            }
            a[pos] = H;
        }
        else
        {
            cin >> H;
            cout << get(H) << '\n';
        }
    }

}


int main()
{
    iof();

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

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

    ctime();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

game.cpp: In function 'void iof()':
game.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(Y8o".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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