Submission #668942

#	Time	Username	Problem	Language	Result	Execution time	Memory
668942		stevancv	Sterilizing Spray (JOI15_sterilizing)	C++14	100 / 100	232 ms	5268 KiB

sterilizing

#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 = 1e5 + 2;
const ll linf = 1e18;
ll st[4 * N];
void Update(int node, int l, int r, int x, int y) {
    if (l == r) {st[node] = y; return;}
    int mid = l + r >> 1;
    if (x <= mid) Update(2 * node, l, mid, x, y);
    else Update(2 * node + 1, mid + 1, r, x, y);
    st[node] = st[2 * node] + st[2 * node + 1];
}
void Spray(int node, int l, int r, int ql, int qr, int k) {
    if (r < ql || qr < l || st[node] == 0) return;
    if (l == r) {st[node] /= k; return;}
    int mid = l + r >> 1;
    Spray(2 * node, l, mid, ql, qr, k);
    Spray(2 * node + 1, mid + 1, r, ql, qr, k);
    st[node] = st[2 * node] + st[2 * node + 1];
}
ll Get(int node, int l, int r, int ql, int qr) {
    if (r < ql || qr < l) return 0;
    if (ql <= l && r <= qr) return st[node];
    int mid = l + r >> 1;
    return Get(2 * node, l, mid, ql, qr) + Get(2 * node + 1, mid + 1, r, ql, qr);
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, q, k;
    cin >> n >> q >> k;
    for (int i = 0; i < n; i++) {
        int x; cin >> x;
        Update(1, 0, n - 1, i, x);
    }
    while (q--) {
        int ty, x, y;
        cin >> ty >> x >> y;
        if (ty == 1) Update(1, 0, n - 1, x - 1, y);
        else if (ty == 2 && k > 1) Spray(1, 0, n - 1, x - 1, y - 1, k);
        else if (ty == 3) cout << Get(1, 0, n - 1, x - 1, y - 1) << en;
    }
    return 0;
}

Compilation message (stderr)

sterilizing.cpp: In function 'void Update(int, int, int, int, int)':
sterilizing.cpp:14:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   14 |     int mid = l + r >> 1;
      |               ~~^~~
sterilizing.cpp: In function 'void Spray(int, int, int, int, int, int)':
sterilizing.cpp:22:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   22 |     int mid = l + r >> 1;
      |               ~~^~~
sterilizing.cpp: In function 'long long int Get(int, int, int, int, int)':
sterilizing.cpp:30:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |     int mid = l + r >> 1;
      |               ~~^~~

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