Submission #829004

#	Time	Username	Problem	Language	Result	Execution time	Memory
829004		Trunkty	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1081 ms	13984 KiB

shoes

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
//#define int ll
 
#include "shoes.h"
 
ll ans;
vector<int> lef[100005],rit[100005];
int mat[200005];
int curr[200005];
 
ll count_swaps(vector<int> s){
	for(int i=0;i<s.size();i++){
		if(s[i]<0){
			lef[-s[i]].push_back(i+1);
		}
        else{
            rit[s[i]].push_back(i+1);
        }
        curr[i+1] = i+1;
	}
    for(int i=1;i<=1e5;i++){
        for(int j=0;j<lef[i].size();j++){
            mat[lef[i][j]] = rit[i][j];
        }
    }
    for(int i=1;i<=2*s.size();i++){
        if(mat[i]){
            int pa,pb;
            for(int j=1;j<=2*s.size();j++){
                if(curr[j]==i){
                    pa = j;
                }
                if(curr[j]==mat[i]){
                    pb = j;
                }
            }
            if(pa<pb){
                while(pb>pa+1){
                    swap(curr[pb],curr[pb-1]);
                    pb--;
                    ans++;
                }
            }
            else{
                while(pa>pb){
                    swap(curr[pa],curr[pa-1]);
                    pa--;
                    ans++;
                }
            }
        }
    }
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'll count_swaps(std::vector<int>)':
shoes.cpp:14:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for(int i=0;i<s.size();i++){
      |              ~^~~~~~~~~
shoes.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         for(int j=0;j<lef[i].size();j++){
      |                     ~^~~~~~~~~~~~~~
shoes.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(int i=1;i<=2*s.size();i++){
      |                 ~^~~~~~~~~~~~
shoes.cpp:31:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |             for(int j=1;j<=2*s.size();j++){
      |                         ~^~~~~~~~~~~~
shoes.cpp:30:20: warning: 'pb' may be used uninitialized in this function [-Wmaybe-uninitialized]
   30 |             int pa,pb;
      |                    ^~
shoes.cpp:30:17: warning: 'pa' may be used uninitialized in this function [-Wmaybe-uninitialized]
   30 |             int pa,pb;
      |                 ^~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15