Submission #104590

#	Time	Username	Problem	Language	Result	Execution time	Memory
104590		Hassoony	Simfonija (COCI19_simfonija)	C++17	66 / 110	58 ms	2168 KiB

simfonija

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
const ll mod=(1e9+7);
const ll inf=(1ll<<61);
const int MX=1e5+9;
int n,k,a[MX],x;
int main(){
    cin>>n>>k;
    for(int i=0;i<n;i++)scanf("%d",&a[i]);
    for(int i=0;i<n;i++)scanf("%d",&x),a[i]-=x;
    sort(a,a+n);
    int p1=0,p2=n-1;
    ll ans=0;
    bool ok=0;
    while(k--){
        int mid=(p1+p2)/2;
        if(abs(a[mid]-a[p1]) > abs(a[p2]-a[mid]))p1++;
        else if(abs(a[mid]-a[p1]) < abs(a[p2]-a[mid]))p2--;
        else{
            if(k>=1){
                p1++;p2--;
                k--;
            }
            else ok=1;
        }
    }
    if(!ok){
        int x=a[(p1+p2)/2];
        for(int i=p1;i<=p2;i++){
            a[i]-=x;
            ans+=abs(a[i]);
        }
        cout<<ans<<endl;
    }
    else{
        ll ans1=0;
        p1++;
        int x=a[(p1+p2)/2];
        for(int i=p1;i<=p2;i++){
            a[i]-=x;
            ans1+=abs(a[i]);
        }
        p1--;p2--;
        x=a[(p1+p2)/2];
        for(int i=p1;i<=p2;i++){
            a[i]-=x;
            ans+=abs(a[i]);
        }
        cout<<min(ans,ans1)<<endl;
    }
}

Compilation message (stderr)

simfonija.cpp: In function 'int main()':
simfonija.cpp:11:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=0;i<n;i++)scanf("%d",&a[i]);
                         ~~~~~^~~~~~~~~~~~
simfonija.cpp:12:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=0;i<n;i++)scanf("%d",&x),a[i]-=x;
                         ~~~~~~~~~~~~~~^~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 11 / 11
• Subtask 5: 11 / 11
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 11
• Subtask 9: 0 / 11
• Subtask 10: 11 / 11