Submission #1144481

#	Time	Username	Problem	Language	Result	Execution time	Memory
1144481		zhasyn	Arranging Shoes (IOI19_shoes)	C++20	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
using namespace std;
#define ll long long
const ll N = 1e5 + 100;
ll fen[N];
deque <ll> pos[N], neg[N];
void upd(int i, int delta){
	for(; i < N; i |= (i + 1)){
		fen[i] += delta;
	}
}
ll get(ll r){
	ll res = 0;
	for(; r >= 0; r = (r &(r + 1)) - 1){
		res += fen[r];
	}
	return res;
}
long long count_swaps(std::vector<int> s) {
	ll ans = 0, last;
	for(int i = 0; i < (int)s.size(); i++){
		if(vec[i] < 0) neg[-s[i]].pb(i);
		else pos[s[i]].pb(i);
		upd(i, 1);
	}
	
	for(int i = 0; i < n; i++){
		if(was[i]) continue;
		if(s[i] < 0){
			last = pos[-s[i]].front();
			ans -= 2;
		}
		else{
			last = neg[s[i]].front();
			ans--;
		}
		
		pos[abs(s[i])].pop_front();
		pos[abs(s[i])].pop_front();
		
		ans += get(last);
		was[last] = true;
		upd(last, -1);
		upd(i, -1);
	}
	return ans;
}

Compilation message (stderr)

shoes.cpp:6:1: error: 'deque' does not name a type
    6 | deque <ll> pos[N], neg[N];
      | ^~~~~
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:22:20: error: 'vec' was not declared in this scope
   22 |                 if(vec[i] < 0) neg[-s[i]].pb(i);
      |                    ^~~
shoes.cpp:22:32: error: 'neg' was not declared in this scope
   22 |                 if(vec[i] < 0) neg[-s[i]].pb(i);
      |                                ^~~
shoes.cpp:23:22: error: 'pos' was not declared in this scope
   23 |                 else pos[s[i]].pb(i);
      |                      ^~~
shoes.cpp:27:28: error: 'n' was not declared in this scope
   27 |         for(int i = 0; i < n; i++){
      |                            ^
shoes.cpp:28:20: error: 'was' was not declared in this scope
   28 |                 if(was[i]) continue;
      |                    ^~~
shoes.cpp:30:32: error: 'pos' was not declared in this scope
   30 |                         last = pos[-s[i]].front();
      |                                ^~~
shoes.cpp:34:32: error: 'neg' was not declared in this scope
   34 |                         last = neg[s[i]].front();
      |                                ^~~
shoes.cpp:38:17: error: 'pos' was not declared in this scope
   38 |                 pos[abs(s[i])].pop_front();
      |                 ^~~
shoes.cpp:42:17: error: 'was' was not declared in this scope
   42 |                 was[last] = true;
      |                 ^~~