int n,r,pos;
long long ans;
std::vector<int>locl[500001],locr[500001];
int fix[500001];
int indl[500001],indr[500001];
int tree[500001];
void upd(int node,int tl,int tr,int pos){
if(tl==tr){
tree[node] = 1;
return;
}
int mid = (tl+tr)/2;
if(pos<=mid)
upd(node*2,tl,mid,pos);
else
upd(node*2+1,mid+1,tr,pos);
tree[node] = tree[node*2] + tree[node*2+1];
}
int get(int node,int tl,int tr){
if(r<tl)return 0;
if(tr<=r)return tree[node];
int mid = (tr+tl)/2;
int x = get(node*2,tl,mid);
int y = get(node*2+1,mid+1,tr);
return x+y;
}
long long count_swaps(std::vector<int> s) {
for(int i=0;i<n;i++){
if(s[i]<0){
locl[-s[i]].push_back(i);
} else {
locr[s[i]].push_back(i);
}
}
for(int i=0;i<n;i++)
if(!fix[i]){
if(s[i]<0){
int loc = locr[ -s[i] ][ indr[ -s[i] ] ];
r = loc;
ans += loc - i - 1 - get(1,0,n-1);
indr[ -s[i] ] ++;
indl[ -s[i] ] ++;
fix[loc]=1;
upd(1,0,n-1,loc);
} else {
int loc = locl[ s[i] ][ indl[ s[i] ] ];
//cout<<loc<<endl;
r = loc;
ans += loc - i - get(1,0,n-1);
//cout<<ans<<endl;
indl[ s[i] ] ++;
indr[ s[i] ] ++;
fix[loc]=1;
upd(1,0,n-1,loc);
}
}
return ans;
}
Compilation message
shoes.cpp:5:6: error: 'vector' in namespace 'std' does not name a template type
std::vector<int>locl[500001],locr[500001];
^~~~~~
shoes.cpp:42:28: error: 'vector' is not a member of 'std'
long long count_swaps(std::vector<int> s) {
^~~~~~
shoes.cpp:42:35: error: expected primary-expression before 'int'
long long count_swaps(std::vector<int> s) {
^~~
