Submission #644406

#	Time	Username	Problem	Language	Result	Execution time	Memory
644406		a_aguilo	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

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

using namespace std;

int N;

void change(int index, int delta, int BIT[]){
    for(; index <N; index += (index&(-index))){
        BIT[index]+=delta;
    }
}

int query(int index, int BIT[]){
    int ans = 0;
    for(; index > 0; index -= (index&(-index))) ans+= BIT[index];
    return ans;
}

long long count_swaps(vector<int> s) {
    map<int, queue<int>> M;
    N = s.size()+1;
    int BIT[N];
    memset(BIT, 0, sizeof(BIT));
    for(int i = 1; i < N; ++i) change(i, 1, BIT);
    long long ans = 0;
    for(int i = 0; i < s.size(); ++i){
        //cout << i << " " << ans << endl;
        if(M.find(-s[i]) == M.end()){
            if(M.find(s[i]) == M.end()){
                M[s[i]] = {i};
            }
            else if(M[s[i]].empty()){
                M[s[i]] = {i};
            }
            else{
                M[s[i]].push(i);
            }
        }
        else if(M[-s[i]].empty()){
            if(M.find(s[i]) == M.end()){
                M[s[i]] = {i};
            }
            else if(M[s[i]].empty()){
                M[s[i]] = {i};
            }
            else{
                M[s[i]].push(i);
            }
        }
        else{
            if(s[i] < 0) ans++;
            //cout << "a ";
            int prev = M[-s[i]].front();
            //cout <<"b ";
            M[-s[i]].pop();
            //cout <<"c ";
            ans += (long long)query(i, BIT)-(long long)query(prev+1, BIT);
            //cout <<"d ";
            change(i+1, -1, BIT);
            //cout << "e ";
            change(prev+1, 1, BIT);
        }

    }
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i = 0; i < s.size(); ++i){
      |                    ~~^~~~~~~~~~
shoes.cpp:31:29: error: no match for 'operator=' (operand types are 'std::map<int, std::queue<int> >::mapped_type' {aka 'std::queue<int>'} and '<brace-enclosed initializer list>')
   31 |                 M[s[i]] = {i};
      |                             ^
In file included from /usr/include/c++/10/queue:64,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:86,
                 from shoes.cpp:2:
/usr/include/c++/10/bits/stl_queue.h:96:11: note: candidate: 'std::queue<int>& std::queue<int>::operator=(const std::queue<int>&)'
   96 |     class queue
      |           ^~~~~
/usr/include/c++/10/bits/stl_queue.h:96:11: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const std::queue<int>&'
/usr/include/c++/10/bits/stl_queue.h:96:11: note: candidate: 'std::queue<int>& std::queue<int>::operator=(std::queue<int>&&)'
/usr/include/c++/10/bits/stl_queue.h:96:11: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::queue<int>&&'
shoes.cpp:34:29: error: no match for 'operator=' (operand types are 'std::map<int, std::queue<int> >::mapped_type' {aka 'std::queue<int>'} and '<brace-enclosed initializer list>')
   34 |                 M[s[i]] = {i};
      |                             ^
In file included from /usr/include/c++/10/queue:64,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:86,
                 from shoes.cpp:2:
/usr/include/c++/10/bits/stl_queue.h:96:11: note: candidate: 'std::queue<int>& std::queue<int>::operator=(const std::queue<int>&)'
   96 |     class queue
      |           ^~~~~
/usr/include/c++/10/bits/stl_queue.h:96:11: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const std::queue<int>&'
/usr/include/c++/10/bits/stl_queue.h:96:11: note: candidate: 'std::queue<int>& std::queue<int>::operator=(std::queue<int>&&)'
/usr/include/c++/10/bits/stl_queue.h:96:11: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::queue<int>&&'
shoes.cpp:42:29: error: no match for 'operator=' (operand types are 'std::map<int, std::queue<int> >::mapped_type' {aka 'std::queue<int>'} and '<brace-enclosed initializer list>')
   42 |                 M[s[i]] = {i};
      |                             ^
In file included from /usr/include/c++/10/queue:64,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:86,
                 from shoes.cpp:2:
/usr/include/c++/10/bits/stl_queue.h:96:11: note: candidate: 'std::queue<int>& std::queue<int>::operator=(const std::queue<int>&)'
   96 |     class queue
      |           ^~~~~
/usr/include/c++/10/bits/stl_queue.h:96:11: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const std::queue<int>&'
/usr/include/c++/10/bits/stl_queue.h:96:11: note: candidate: 'std::queue<int>& std::queue<int>::operator=(std::queue<int>&&)'
/usr/include/c++/10/bits/stl_queue.h:96:11: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::queue<int>&&'
shoes.cpp:45:29: error: no match for 'operator=' (operand types are 'std::map<int, std::queue<int> >::mapped_type' {aka 'std::queue<int>'} and '<brace-enclosed initializer list>')
   45 |                 M[s[i]] = {i};
      |                             ^
In file included from /usr/include/c++/10/queue:64,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:86,
                 from shoes.cpp:2:
/usr/include/c++/10/bits/stl_queue.h:96:11: note: candidate: 'std::queue<int>& std::queue<int>::operator=(const std::queue<int>&)'
   96 |     class queue
      |           ^~~~~
/usr/include/c++/10/bits/stl_queue.h:96:11: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const std::queue<int>&'
/usr/include/c++/10/bits/stl_queue.h:96:11: note: candidate: 'std::queue<int>& std::queue<int>::operator=(std::queue<int>&&)'
/usr/include/c++/10/bits/stl_queue.h:96:11: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'std::queue<int>&&'