Submission #991335

#	Time	Username	Problem	Language	Result	Execution time	Memory
991335		gmroh06	즐거운 사진 수집 (JOI13_collecting)	C++14	100 / 100	808 ms	78420 KiB

collecting

#include <bits/stdc++.h>
 
using namespace std;
using ll = long long;
 
inline void fastio() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    std::cout.tie(nullptr);
}
 
ll n, q, MAX;
ll row_tree[1 << 21], col_tree[1 << 21];
ll row[21], col[21];
 
void update(ll* tree, ll* cnt, ll loc) {
    loc |= MAX;
    tree[loc] ^= 1;
    ll d = n;
 
    while (loc > 1) {
        loc >>= 1, d--;
 
        if (tree[loc] % (1LL << n - d) == 0) cnt[d]--;
 
        tree[loc] = tree[loc << 1] + tree[loc << 1 | 1];
 
        if (tree[loc] % (1LL << n - d) == 0) cnt[d]++;
    }
}
 
int main() {
    fastio();
 
    cin >> n >> q;
 
    MAX = 1 << n;
 
    for (ll i = 0; i <= 20; i++) {
        row[i] = col[i] = 1LL << i;
    }
 
    while (q--) {
        ll t, x, ans = 1LL << 2 * n;
 
        cin >> t >> x;
 
        t ? update(col_tree, col, x - 1) : update(row_tree, row, x - 1);
 
        for (ll i = 0; i < n; i++) {
            ans += 1LL << 2 * i;
            ans -= row[i] * col[i] * 4;
        }
 
        cout << ans << '\n';
    }
 
    return 0;
}

Compilation message (stderr)

collecting.cpp: In function 'void update(ll*, ll*, ll)':
collecting.cpp:24:35: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   24 |         if (tree[loc] % (1LL << n - d) == 0) cnt[d]--;
      |                                 ~~^~~
collecting.cpp:28:35: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   28 |         if (tree[loc] % (1LL << n - d) == 0) cnt[d]++;
      |                                 ~~^~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 70 / 70