Submission #771848

#	Time	Username	Problem	Language	Result	Execution time	Memory
771848		Dan4Life	Bubble Sort 2 (JOI18_bubblesort2)	C++17	0 / 100	21 ms	1488 KiB

bubblesort2

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
using vi = vector<int>;
#define mp make_pair
#define lb lower_bound
#define sz(a) (int)a.size()
#define all(a) begin(a),end(a)
const int mxN = (int)1e6+5;
vi a;
vector<pair<int,int>> v;
int seg[mxN*2], lzy[mxN*2];
 
void prop(int p, int l, int r){
    if(l==r or !lzy[p]) return;
    int mid = (l+r)/2; int rp = p+2*(mid-l+1);
    lzy[p+1]+=lzy[p], lzy[rp]+=lzy[p];
    seg[p+1]+=lzy[p], seg[rp]+=lzy[p], lzy[p]=0;
}
 
void upd(int i, int j, int vv, int p=0, int l=1, int r=sz(v)){
    if(i>r or j<l or i>j) return; prop(p,l,r);
    if(i<=l and r<=j){ seg[p]+=vv,lzy[p]+=vv; return; }
    int mid = (l+r)/2; int rp = p+2*(mid-l+1);
    if(i<=mid) upd(i,j,vv,p+1,l,mid);
    if(j>mid) upd(i,j,vv,rp,mid+1,r);
    seg[p] = max(seg[p+1],seg[rp]);
}
 
void add(int i, int x){
    int j = lb(all(v),mp(a[i],i))-begin(v);
    int j2 = lb(all(v),mp(a[i],-1))-begin(v);
    upd(j,j,i*x), upd(j2,sz(v),-x);
}
 
vi countScans(vi A, vi x, vi y){
    int n = sz(A), q = sz(x); vi ans; a.pb(0); a=A;
    for(int i = 1; i <= n; i++) v.pb({a[i],i});
    for(int i = 0; i < q; i++) v.pb({y[i],++x[i]});
    sort(all(v)); v.erase(unique(all(v)),end(v));
    for(int i = 1; i <= n; i++) add(i,1);
    for(int i = 0; i < q; i++)
        add(x[i],-1),a[x[i]]=y[i],add(x[i],1),ans.pb(seg[0]);
	return ans;
}

Compilation message (stderr)

bubblesort2.cpp: In function 'void upd(int, int, int, int, int, int)':
bubblesort2.cpp:22:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   22 |     if(i>r or j<l or i>j) return; prop(p,l,r);
      |     ^~
bubblesort2.cpp:22:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   22 |     if(i>r or j<l or i>j) return; prop(p,l,r);
      |                                   ^~~~
bubblesort2.cpp: In function 'vi countScans(vi, vi, vi)':
bubblesort2.cpp:42:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   42 |     for(int i = 0; i < q; i++)
      |     ^~~
bubblesort2.cpp:44:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   44 |  return ans;
      |  ^~~~~~

• Subtask 1: 0 / 17
• Subtask 2: 0 / 21
• Subtask 3: 0 / 22
• Subtask 4: 0 / 40