Submission #739765

#	Time	Username	Problem	Language	Result	Execution time	Memory
739765		bgnbvnbv	Sterilizing Spray (JOI15_sterilizing)	C++14	100 / 100	243 ms	8140 KiB

sterilizing

#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<int,int>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=2e5;
const ll inf=1e18;
const ll mod=1e9+7;
ll st[4*maxN],mx[4*maxN],n;
void update(ll pos,ll val,ll id=1,ll l=1,ll r=n)
{
    if(l==r)
    {
        st[id]=val;
        mx[id]=val;
        return;
    }
    ll mid=l+r>>1;
    if(pos<=mid) update(pos,val,id*2,l,mid);
    else update(pos,val,id*2+1,mid+1,r);
    st[id]=st[id*2]+st[id*2+1];
    mx[id]=max(mx[id*2],mx[id*2+1]);
}
ll k;
void upd(ll i,ll j,ll id=1,ll l=1,ll r=n)
{
    if(j<l||r<i) return;
    if(mx[id]==0) return;
    if(l==r)
    {
        st[id]=st[id]/k;
        mx[id]=mx[id]/k;
        return;
    }
    ll mid=l+r>>1;
    upd(i,j,id*2,l,mid);
    upd(i,j,id*2+1,mid+1,r);
    st[id]=st[id*2]+st[id*2+1];
    mx[id]=max(mx[id*2],mx[id*2+1]);
}
ll get(ll i,ll j,ll id=1,ll l=1,ll r=n)
{
    if(j<l||r<i) return 0;
    if(i<=l&&r<=j) return st[id];
    ll mid=l+r>>1;
    return get(i,j,id*2,l,mid)+get(i,j,id*2+1,mid+1,r);
}
ll q,a[maxN];
void solve()
{
    cin >> n >> q >> k;
    for(int i=1;i<=n;i++) cin >> a[i],update(i,a[i]);
    for(int i=1;i<=q;i++)
    {
        ll t;
        cin >> t;
        if(t==1)
        {
            ll pos,val;
            cin >> pos >> val;
            update(pos,val);
        }
        else if(t==2)
        {
            ll l,r;
            cin >> l >> r;
            if(k!=1)
            {
                upd(l,r);
            }
        }
        else
        {
            ll l,r;
            cin >> l >> r;
            cout << get(l,r)<<'\n';
        }
    }
}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

Compilation message (stderr)

sterilizing.cpp: In function 'void update(ll, ll, ll, ll, ll)':
sterilizing.cpp:22:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   22 |     ll mid=l+r>>1;
      |            ~^~
sterilizing.cpp: In function 'void upd(ll, ll, ll, ll, ll)':
sterilizing.cpp:39:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   39 |     ll mid=l+r>>1;
      |            ~^~
sterilizing.cpp: In function 'll get(ll, ll, ll, ll, ll)':
sterilizing.cpp:49:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   49 |     ll mid=l+r>>1;
      |            ~^~

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