Submission #700131

#	Time	Username	Problem	Language	Result	Execution time	Memory
700131		fdnfksd	Money (IZhO17_money)	C++14	100 / 100	244 ms	57108 KiB

money

#include<bits/stdc++.h>
#define TASKNAME "bieudo"
#define pb push_back
#define pli pair<int,int>
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=1e6+10;
const ll inf=1e18;
const ll mod=1e9+7;
ll bit[maxN];
ll a[maxN];
vector<ll> vec[maxN];
ll n;
void update(ll i,ll val)
{
    while(i<=1e6)
    {
        bit[i]+=val;
        i+=(i&(-i));
    }
}
ll get(ll i)
{
    ll cc=0;
    while(i>0)
    {
        cc+=bit[i];
        i-=(i&(-i));
    }
    return cc;
}
ll getlr(ll i,ll j)
{
    if(i>j) return 0;
    return get(j)-get(i-1);
}
void solve()
{
    cin >> n;
    for(int i=1;i<=n;i++)
    {
        cin >> a[i];
    }
    a[0]=0;
    ll cnt=0;
    for(int i=1;i<=n;i++)
    {
        ll j=i+1;
        cnt++;
        vec[cnt].pb(a[i]);
        while(j<=n&&a[j]>=a[j-1])
        {
            vec[cnt].pb(a[j]);
            j++;
        }
        i=j-1;
    }
    for(auto zz:vec[1])
    {
        update(zz,1);
    }
    ll ans=cnt;
    for(int i=2;i<=cnt;i++)
    {
        ll pre=vec[i][0];
        for(int j=1;j<vec[i].size();j++)
        {
            if(getlr(pre+1,vec[i][j]-1)>0)
            {
                ans++;
                pre=vec[i][j];
            }
        }
        for(auto zz:vec[i])
        {
            update(zz,1);
        }
    }
    cout << ans;
}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

Compilation message (stderr)

money.cpp: In function 'void solve()':
money.cpp:67:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |         for(int j=1;j<vec[i].size();j++)
      |                     ~^~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 55 / 55