Submission #731845

#	Time	Username	Problem	Language	Result	Execution time	Memory
731845		stevancv	Simple game (IZhO17_game)	C++14	100 / 100	320 ms	19460 KiB

game

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e6 + 2;
const int inf = 2e9 + 2;
int st[4 * N], lzy[4 * N];
void Propagate(int node, int l, int r) {
    if (lzy[node] == 0) return;
    if (l < r) {
        lzy[2 * node] += lzy[node];
        lzy[2 * node + 1] += lzy[node];
    }
    st[node] += lzy[node];
    lzy[node] = 0;
}
void Add(int node, int l, int r, int ql, int qr, int x) {
    Propagate(node, l, r);
    if (r < ql || qr < l || ql > qr) return;
    if (ql <= l && r <= qr) {
        lzy[node] += x;
        Propagate(node, l, r);
        return;
    }
    int mid = l + r >> 1;
    Add(2 * node, l, mid, ql, qr, x);
    Add(2 * node + 1, mid + 1, r, ql, qr, x);
    st[node] = max(st[2 * node], st[2 * node + 1]);
}
int Get(int node, int l, int r, int x) {
    Propagate(node, l, r);
    if (l == r) return st[node];
    int mid = l + r >> 1;
    if (x <= mid) return Get(2 * node, l, mid, x);
    return Get(2 * node + 1, mid + 1, r, x);
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, q;
    cin >> n >> q;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int i = 1; i < n; i++) {
        int manji = min(a[i - 1], a[i]);
        int veci = max(a[i - 1], a[i]);
        Add(1, 1, N, manji + 1, veci - 1, 1);
    }
    while (q--) {
        int ty; cin >> ty;
        if (ty == 2) {
            int x; cin >> x;
            cout << Get(1, 1, N, x) << en;
            continue;
        }
        int i, manji, veci; cin >> i; i -= 1;
        if (i > 0) {
            manji = min(a[i - 1], a[i]);
            veci = max(a[i - 1], a[i]);
            Add(1, 1, N, manji + 1, veci - 1, -1);
        }
        if (i < n - 1) {
            manji = min(a[i], a[i + 1]);
            veci = max(a[i], a[i + 1]);
            Add(1, 1, N, manji + 1, veci - 1, -1);
        }
        cin >> a[i];
        if (i > 0) {
            manji = min(a[i - 1], a[i]);
            veci = max(a[i - 1], a[i]);
            Add(1, 1, N, manji + 1, veci - 1, 1);
        }
        if (i < n - 1) {
            manji = min(a[i], a[i + 1]);
            veci = max(a[i], a[i + 1]);
            Add(1, 1, N, manji + 1, veci - 1, 1);
        }
    }
    return 0;
}

Compilation message (stderr)

game.cpp: In function 'void Add(int, int, int, int, int, int)':
game.cpp:29:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   29 |     int mid = l + r >> 1;
      |               ~~^~~
game.cpp: In function 'int Get(int, int, int, int)':
game.cpp:37:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   37 |     int mid = l + r >> 1;
      |               ~~^~~

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