Submission #603193

#	Time	Username	Problem	Language	Result	Execution time	Memory
603193		Abdulmohsen1284	Arranging Shoes (IOI19_shoes)	C++14	0 / 100	1 ms	312 KiB

shoes

#include"bits/stdc++.h"
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template<class x>
using ordered_set = tree<x, null_type,less<x>, rb_tree_tag,tree_order_statistics_node_update>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
void usaco(){freopen("cruise.out","w",stdout);freopen("cruise.in","r",stdin);}


#include "shoes.h"
long long l[100005],r[100005];
bool used[100005];
long long count_swaps(std::vector<int> s) {
    long long sum=0;
    for(int i=0;i<s.size();i++)
    {
        if(s[i]<0)
            l[s[i]*-1]=i;
        else
            r[s[i]]=i;
    }
    for(int i=0;i<s.size();i++)
    {
        if(!used[max(s[i]*-1,s[i])])
        {
            if(s[i]<0)
            {
                sum+=(i+1)-r[s[i]*-1];
            }
            else
                sum+=i-l[s[i]];
        }
    }
    return sum;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:17:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for(int i=0;i<s.size();i++)
      |                 ~^~~~~~~~~
shoes.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i=0;i<s.size();i++)
      |                 ~^~~~~~~~~
shoes.cpp: In function 'void usaco()':
shoes.cpp:9:21: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 | void usaco(){freopen("cruise.out","w",stdout);freopen("cruise.in","r",stdin);}
      |              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
shoes.cpp:9:54: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 | void usaco(){freopen("cruise.out","w",stdout);freopen("cruise.in","r",stdin);}
      |                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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