Submission #571226

#	Time	Username	Problem	Language	Result	Execution time	Memory
571226		YouAreMyGalaxy	Sterilizing Spray (JOI15_sterilizing)	C++17	100 / 100	1037 ms	9240 KiB

sterilizing

//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
#define Log2(x) 31 - __builtin_clz(x)
using namespace std;
const int N = 1e5;
int n, q, a[N + 1], k;
set<int> num;
struct FenwickTree
{
    long long tree[N + 1];
    void add(int pos, int val)
    {
        for (; pos <= n; pos += (pos & (-pos)))
        {
            tree[pos] += val;
        }
    }
    long long sum(int pos)
    {
        long long ret = 0;
        for (; pos > 0; pos -= (pos & (-pos)))
        {
            ret += tree[pos];
        }
        return ret;
    }
    long long sum(int l, int r)
    {
        return sum(r) - sum(l - 1);
    }
} tree;
void read()
{
    cin >> n >> q >> k;
    for (int i = 1; i <= n; ++ i)
    {
        cin >> a[i];
        if (a[i])
        {
            num.insert(i);
            tree.add(i, a[i]);
        }
    }
}
void solve()
{
    while(q--)
    {
        int t;
        cin >> t;
        if (t == 1)
        {
            int i, x;
            cin >> i >> x;
            tree.add(i, -a[i]);
            a[i] = x;
            tree.add(i, a[i]);
            if (a[i])
            {
                num.insert(i);
            }
        }
        else if (t == 2)
        {
            int l, r;
            cin >> l >> r;
            if (k == 1)
            {
                continue;
            }
            vector<int> valid;
            while(true)
            {
                auto it = num.lower_bound(l);
                if (it == num.end() || *it > r)
                {
                    for (int i : valid)
                    {
                        num.insert(i);
                    }
                    break;
                }
                tree.add(*it, -a[*it]);
                a[*it] /= k;
                if (a[*it])
                {
                    tree.add(*it, a[*it]);
                    valid.push_back(*it);
                }
                num.erase(it);
            }
        }
        else
        {
            int l, r;
            cin >> l >> r;
            cout << tree.sum(l, r) << '\n';
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case #" << __ << ":" << '\n';
        read();
        solve();
    }
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:109:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  109 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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