Submission #879011

#	Time	Username	Problem	Language	Result	Execution time	Memory
879011		hafo	Sterilizing Spray (JOI15_sterilizing)	C++14	100 / 100	129 ms	5468 KiB

sterilizing

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned ll
#define pb push_back
#define pa pair<int, int>
#define pall pair<ll, int>
#define fi first
#define se second
#define TASK "test"
#define Size(x) (int) x.size()
#define all(x) x.begin(), x.end()
using namespace std;

template<typename T1, typename T2> bool mini (T1 &a, T2 b) {if(a > b) a = b; else return 0; return 1;}
template<typename T1, typename T2> bool maxi (T1 &a, T2 b) {if(a < b) a = b; else return 0; return 1;}

const int MOD = 1e9 + 7;
const int LOG = 20;
const int maxn = 2e5 + 7;
const ll oo = 1e18 + 69;

int n, q, k, t, l, r, a[maxn];

struct ST {
    ll st[4 * maxn];

    void build(int id, int l, int r) {
        if(l == r) {
            st[id] = a[l];
            return;
        }
        int mid = l + r >> 1;
        build(id << 1, l, mid);
        build(id << 1 | 1, mid + 1, r);
        st[id] = st[id << 1] + st[id << 1 | 1];
    }

    void update(int id, int l, int r, int pos, int val) {
        if(pos < l || pos > r) return;
        if(l == r) {
            st[id] = val;
            return;
        }
        int mid = l + r >> 1;
        update(id << 1, l, mid, pos, val);
        update(id << 1 | 1, mid + 1, r, pos, val);
        st[id] = st[id << 1] + st[id << 1 | 1];
    }

    void update2(int id, int l, int r, int u, int v) {
        if(r < u || l > v) return;
        if(u <= l && r <= v) {
            if(st[id] == 0) return;

            if(l == r) {
                st[id] /= k;
                return;
            }
        }
        int mid = l + r >> 1;
        update2(id << 1, l, mid, u, v);
        update2(id << 1 | 1, mid + 1, r, u, v);
        st[id] = st[id << 1] + st[id << 1 | 1];
    }

    ll get(int id, int l, int r, int u, int v) {
        if(r < u || l > v) return 0;
        if(u <= l && r <= v) return st[id];
        int mid = l + r >> 1;
        return get(id << 1, l, mid, u, v) + get(id << 1 | 1, mid + 1, r, u, v);
    }

} st;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    //freopen(TASK".inp", "r", stdin);
    //freopen(TASK".out", "w", stdout);

    cin>>n>>q>>k;
    for(int i = 1; i <= n; i++) cin>>a[i];

    st.build(1, 1, n);
    while(q--) {
        cin>>t>>l>>r;
        if(t == 1) {
            st.update(1, 1, n, l, r);
        } 
        if(t == 2) {
            if(k > 1) {
                st.update2(1, 1, n, l, r);
            }          
        }
        if(t == 3) {
            cout<<st.get(1, 1, n, l, r)<<"\n";
        }
    }
    return 0;
}

Compilation message (stderr)

sterilizing.cpp: In member function 'void ST::build(int, int, int)':
sterilizing.cpp:32:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   32 |         int mid = l + r >> 1;
      |                   ~~^~~
sterilizing.cpp: In member function 'void ST::update(int, int, int, int, int)':
sterilizing.cpp:44:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   44 |         int mid = l + r >> 1;
      |                   ~~^~~
sterilizing.cpp: In member function 'void ST::update2(int, int, int, int, int)':
sterilizing.cpp:60:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   60 |         int mid = l + r >> 1;
      |                   ~~^~~
sterilizing.cpp: In member function 'long long int ST::get(int, int, int, int, int)':
sterilizing.cpp:69:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   69 |         int mid = l + r >> 1;
      |                   ~~^~~

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