Submission #486362

#	Time	Username	Problem	Language	Result	Execution time	Memory
486362		leinad2	즐거운 채소 기르기 (JOI14_growing)	C++17	30 / 100	31 ms	2252 KiB

growing

#include<bits/stdc++.h>
using namespace std;
int n, i, j, k, A[300010], x;
vector<int>comp, v, V;
long long X[300010], Y[300010], ans=9e18, inv, add;
struct seg
{
    int seg[1200010];
    void update(int id, int s, int e, int x, int v)
    {
        if(e<x||x<s)return;
        if(s==e)
        {
            seg[id]+=v;
            return;
        }
        int m=s+e>>1;
        update(id*2, s, m, x, v);update(id*2+1, m+1, e, x, v);
        seg[id]=seg[id*2]+seg[id*2+1];
    }
    int get(int id, int s, int e, int l, int r)
    {
        if(e<l||r<s)return 0;
        if(l<=s&&e<=r)return seg[id];
        int m=s+e>>1;
        return get(id*2, s, m, l, r)+get(id*2+1, m+1, e, l, r);
    }
}t1, t2;
main()
{
    for(scanf("%d", &n);i++<n;)scanf("%d", &A[i]);
    for(i=0;i++<n;)comp.push_back(A[i]);
    sort(comp.begin(), comp.end());
    comp.erase(unique(comp.begin(), comp.end()), comp.end());
    for(i=0;i++<n;)A[i]=lower_bound(comp.begin(), comp.end(), A[i])-comp.begin()+1;
    x=comp.size();
    for(i=0;i++<n;)
    {
        if(A[i]==x)v.push_back(i);
        else V.push_back(A[i]);
    }
    for(i=0;i<v.size();i++)
    {
        X[1]--;Y[1]+=(v[i]-i);
        X[v[i]-i]+=2;Y[v[i]-i]-=2*(v[i]-i);
    }
    for(i=1;i<=n+1-v.size();i++)X[i]+=X[i-1],Y[i]+=Y[i-1];
    for(auto p:V)
    {
        inv+=t2.get(1, 1, x, 1, p-1);
        t2.update(1, 1, x, p, 1);
    }
    for(i=1;i<=n+1-v.size();i++)
    {
        long long res=X[i]*i+Y[i];
        if(i>=2)
        {
            inv-=t2.get(1, 1, x, V[i-2]+1, x);
            t2.update(1, 1, x, V[i-2], -1);
            add+=t1.get(1, 1, x, V[i-2]+1, x);
            t1.update(1, 1, x, V[i-2], 1);
        }
        ans=min(ans, res+add+inv);
    }
    cout<<ans;
}

Compilation message (stderr)

growing.cpp: In member function 'void seg::update(int, int, int, int, int)':
growing.cpp:17:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   17 |         int m=s+e>>1;
      |               ~^~
growing.cpp: In member function 'int seg::get(int, int, int, int, int)':
growing.cpp:25:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   25 |         int m=s+e>>1;
      |               ~^~
growing.cpp: At global scope:
growing.cpp:29:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   29 | main()
      | ^~~~
growing.cpp: In function 'int main()':
growing.cpp:42:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(i=0;i<v.size();i++)
      |             ~^~~~~~~~~
growing.cpp:47:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     for(i=1;i<=n+1-v.size();i++)X[i]+=X[i-1],Y[i]+=Y[i-1];
      |             ~^~~~~~~~~~~~~~
growing.cpp:53:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for(i=1;i<=n+1-v.size();i++)
      |             ~^~~~~~~~~~~~~~
growing.cpp:31:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     for(scanf("%d", &n);i++<n;)scanf("%d", &A[i]);
      |         ~~~~~^~~~~~~~~~
growing.cpp:31:37: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     for(scanf("%d", &n);i++<n;)scanf("%d", &A[i]);
      |                                ~~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 15
• Subtask 4: 0 / 55