Submission #155982

#	Time	Username	Problem	Language	Result	Execution time	Memory
155982		giorgikob	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"

int n,ans,r,pos;

vector<int>locl[500001],locr[500001],indl[500001],indr[500001];

int tree[500001];

void upd(int node,int tl,int tr){
	
	if(tl==tr){
		tree[node] = 1;
		return;
	}
	
	int mid = (tl+tr)/2;
	
	if(pos<mid)
		upd(node*2,tl,mid);
	else
		upd(node*2+1,mid+1,tr);
	
	tree[node] = tree[node*2] + tree[node*2+1];
}

int get(int node,int tl,int tr){
	
	if(r<tl)return 0;
	
	if(tr<=tr)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) {
	
	n = s.size()/2;
	
	for(int i=0;i<s.size();i++){
		if(s[i]<0){
			locl[-s[i]] = i;
		} else {
			locr[s[i]] = i;
		}
	}
	
	for(int i=0;i<s.size();i++){
		if(s[i]<0){
			int loc = locr[ s[i] ][ indr[ s[i] ] ];
			r = loc;
			ans += loc - i - get(1,0,s.size()-1);
			indr[ s[i] ] ++;
			pos = loc;
			upd(1,0,s.size()-1);
			
		} else {
			int loc = locl[ s[i] ][ indl[ s[i] ] ];
			r = loc;
			ans += loc - i + 1 - get(1,0,s.size()-1);
			indl[ s[i] ] ++;
			pos = loc;
			upd(1,0,s.size()-1);
		}
	}
	
	return ans;
}

Compilation message (stderr)

shoes.cpp:5:1: error: 'vector' does not name a type
 vector<int>locl[500001],locr[500001],indl[500001],indr[500001];
 ^~~~~~
shoes.cpp: In function 'int get(int, int, int)':
shoes.cpp:30:7: warning: self-comparison always evaluates to true [-Wtautological-compare]
  if(tr<=tr)return tree[node];
     ~~^~~~
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:44:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.size();i++){
              ~^~~~~~~~~
shoes.cpp:46:4: error: 'locl' was not declared in this scope
    locl[-s[i]] = i;
    ^~~~
shoes.cpp:46:4: note: suggested alternative: 'bool'
    locl[-s[i]] = i;
    ^~~~
    bool
shoes.cpp:48:4: error: 'locr' was not declared in this scope
    locr[s[i]] = i;
    ^~~~
shoes.cpp:48:4: note: suggested alternative: 'long'
    locr[s[i]] = i;
    ^~~~
    long
shoes.cpp:52:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.size();i++){
              ~^~~~~~~~~
shoes.cpp:54:14: error: 'locr' was not declared in this scope
    int loc = locr[ s[i] ][ indr[ s[i] ] ];
              ^~~~
shoes.cpp:54:14: note: suggested alternative: 'loc'
    int loc = locr[ s[i] ][ indr[ s[i] ] ];
              ^~~~
              loc
shoes.cpp:54:28: error: 'indr' was not declared in this scope
    int loc = locr[ s[i] ][ indr[ s[i] ] ];
                            ^~~~
shoes.cpp:54:28: note: suggested alternative: 'int'
    int loc = locr[ s[i] ][ indr[ s[i] ] ];
                            ^~~~
                            int
shoes.cpp:62:14: error: 'locl' was not declared in this scope
    int loc = locl[ s[i] ][ indl[ s[i] ] ];
              ^~~~
shoes.cpp:62:14: note: suggested alternative: 'loc'
    int loc = locl[ s[i] ][ indl[ s[i] ] ];
              ^~~~
              loc
shoes.cpp:62:28: error: 'indl' was not declared in this scope
    int loc = locl[ s[i] ][ indl[ s[i] ] ];
                            ^~~~
shoes.cpp:62:28: note: suggested alternative: 'int'
    int loc = locl[ s[i] ][ indl[ s[i] ] ];
                            ^~~~
                            int