Submission #1277874

#	Time	Username	Problem	Language	Result	Execution time	Memory
1277874		wedonttalkanymore	Sterilizing Spray (JOI15_sterilizing)	C++20	80 / 100	5089 ms	13428 KiB

sterilizing

#include <bits/stdc++.h>
/*
    Brute to win
*/
using namespace std;
using ll = long long;

#define int long long
#define pii pair<ll, ll>
#define fi first
#define se second

const ll N = 2e5 + 5, inf = 1e18, mod = 1e9 + 7, block = 320, lim = 19;

int n, q, k;

struct ST {
	vector <pii> st;
	ST (int _n) {
		st.assign(4 * (_n + 1), make_pair(0, 0));
	}
	void update1(int i, int l, int r, int pos, int val) {
		if (l == r) {
			st[i].fi = val;
			st[i].se = val;
			return;
		}
		int mid = (l + r) / 2;
		if (pos <= mid) update1(2 * i, l, mid, pos, val);
		else update1(2 * i + 1, mid + 1, r, pos, val);
		st[i].fi = st[2 * i].fi + st[2 * i + 1].fi;
		st[i].se = max(st[2 * i].se, st[2 * i + 1].se);
	}
	void update2(int i, int l, int r, int u, int v, int val) {
		if (u > r || v < l) return;
		if (st[i].se == 0) return;
		if (l == r) {
			st[i].fi /= k;
			st[i].se /= k;
			return;
		}
		int mid = (l + r) / 2;
		update2(2 * i, l, mid, u, v, val);
		update2(2 * i + 1, mid + 1, r, u, v, val);
		st[i].fi = st[2 * i].fi + st[2 * i + 1].fi;
		st[i].se = max(st[2 * i].se, st[2 * i + 1].se);
	}
	int get(int i, int l, int r, int u, int v) {
		if (u > r || v < l) return 0;
		if (u <= l && r <= v) return st[i].fi;
		int mid = (l + r) / 2;
		return get(2 * i, l, mid, u, v) + get(2 * i + 1, mid + 1, r, u, v);
	}
} st(N);

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    if (fopen(".inp", "r")) {
        freopen(".inp", "r", stdin);
        freopen(".out", "w", stdout);
    }
    cin >> n >> q >> k;
    for (int i = 1; i <= n; i++) {
    	int x;
    	cin >> x;
    	st.update1(1, 1, n, i, x);
	}
	for (int i = 1; i <= q; i++) {
		int type, x, y;
		cin >> type >> x >> y;
		if (type == 1) {
			st.update1(1, 1, n, x, y);
		}
		else if (type == 2) {
			st.update2(1, 1, n, x, y, k);
		}
		else {
			cout << st.get(1, 1, n, x, y) << '\n';
		}
	}
    return 0;
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         freopen(".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
sterilizing.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         freopen(".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 75 / 75