Submission #157509

#	Time	Username	Problem	Language	Result	Execution time	Memory
157509		tevdore	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include<bits/stdc++.h>
#define mid (L+R)/2
using namespace std;
int n,i,ans,k;
int x[100001],sg[100001];
queue<int>q1[100001];
queue<int>q2[100001];
void upd(int u,int L,int R,int pos,int y){
	if(R < pos || L > pos)return;
	if(R == L){sg[u]=y;return;}
	else{
		upd(u*2,L,mid,pos,y);
		upd(u*2+1,mid+1,R,pos,y);
		sg[u]=sg[u*2]+sg[u*2+1];
	}
}
int get(int u,int L,int R,int a,int b){
	if(b < L || a > R)return 0;
	if(a <= L && b >= R)return sg[u];
	return(get(u*2,L,mid,a,b)+get(u*2+1,mid+1,R,a,b));
}
int main(){
	cin>>n;
	for(i=1;i<=2*n;i++){
		upd(1,1,2*n,i,1);
	}
	for(i=1;i<=2*n;i++){
		cin>>x[i];
		if(x[i] < 0){
		    k=-(x[i]);
			if(q2[k].size() == 0){
				q1[k].push(i);
				continue;
			}
			ans+=get(1,1,2*n,q2[k].front(),i)-1;
			upd(1,1,2*n,q2[k].front(),2);
			upd(1,1,2*n,i,0);
			q2[k].pop();
		}
		if(x[i] > 0){
		    k=x[i];
			if(q1[k].size() == 0){
				q2[k].push(i);
				continue;
			}
			ans+=get(1,1,2*n,q1[k].front(),i)-2;
			upd(1,1,2*n,q1[k].front(),2);
			upd(1,1,2*n,i,0);
			q1[k].pop();
		}
	}
	cout<<ans<<endl;
}

Compilation message (stderr)

/tmp/ccHxFhVW.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccb5hiq1.o:shoes.cpp:(.text.startup+0x0): first defined here
/tmp/ccHxFhVW.o: In function `main':
grader.cpp:(.text.startup+0x272): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status