Submission #960510

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
960510	2024-04-10T14:43:07 Z	vjudge1	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1 ms	348 KB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
#define ll long long

using namespace std;

#define all(v) v.begin(),v.end()
#define pb push_back

struct FWT{
	vector<ll> bit;

	FWT(ll n){
		bit.resize(n + 69);
	}

	ll lsb(ll i){
		return (-i) & i;
	}

	void modify(ll i,ll v){
		for(i++;i<bit.size();i += lsb(i))bit[i] += v;
	}

	ll query(ll i){
		ll ans = 0;
		for(i++;i;i -= lsb(i))ans += bit[i];
		return ans;
	}
};

ll count_swaps(vector<int> A) {
	ll n = A.size();

	map<ll,vector<ll> > ind;

	for(ll i = 0;i<n;i++)ind[A[i]].pb(i);
	for(auto u : ind)reverse(u.second.begin(), u.second.end());
	ll o[n];
	memset(o, -1, sizeof o);
	for(ll i = 0;i<n;i++){
		if(o[i] != -1)continue;
		if(A[i] < 0){
			o[i] = 2 * i + 1;
			o[ind[-A[i]].back()] = 2 * i + 2;
		}else{
			o[i] = 2 * i + 2;
			o[ind[-A[i]].back()] = 2 * i + 1;
		}
		ind[A[i]].pop_back();
		ind[-A[i]].pop_back();
	} 
	ll ans = 0;

	FWT fwt(2 * n);

	for(ll i = n-1;i>=0;i--){
		ans += fwt.query(o[i] - 1);
		fwt.modify(o[i], 1);
	}

	return ans;
}
  

Compilation message

shoes.cpp: In member function 'void FWT::modify(long long int, long long int)':
shoes.cpp:22:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |   for(i++;i<bit.size();i += lsb(i))bit[i] += v;
      |           ~^~~~~~~~~~~

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct

Subtask #2

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Incorrect	0 ms	348 KB	Output isn't correct
15	Halted	0 ms	0 KB	-

Subtask #3

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Incorrect	0 ms	348 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #4

0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Incorrect	1 ms	348 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #5

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Incorrect	0 ms	348 KB	Output isn't correct
15	Halted	0 ms	0 KB	-

Subtask #6

0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Incorrect	0 ms	348 KB	Output isn't correct
15	Halted	0 ms	0 KB	-