Submission #314436

#	Time	Username	Problem	Language	Result	Execution time	Memory
314436		urosk	Colouring a rectangle (eJOI19_colouring)	C++14	10 / 100	363 ms	2040 KiB

colouring

#include <bits/stdc++.h>
#include <chrono>
#define ll long long
#define ull unsigned long long
#define ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define inf 1e15
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
using namespace std;
using namespace std::chrono;
/*auto start = high_resolution_clock::now();
auto stop = high_resolution_clock::now();
auto duration = duration_cast<microseconds>(stop - start);
cout << "Time taken by function: "
         << duration.count() << " microseconds" << endl;*/
const int maxn = 2e5+5;
int a[maxn];
int b[maxn];
int main(){
    int n,m;
    cin >> n >> m;
    for(int i = 0;i<n+m-1;i++){
        cin >> a[i];
    }
    for(int i = 0;i<n+m-1;i++){
        cin >> b[i];
    }
    if(n!=1){
        ll ans1 = 0;
        ll ans2 = 0;
        ll ans = 0;
        if(n+m>4){
            a[n+m-2]=min(a[n+m-2],b[n+m-4]);
            a[0]=min(a[0],b[(n+m-1)/2-(n+m-1)%2]);
            b[0]=min(b[0],a[(n+m-1)/2-(n+m-1)%2]);
            b[n+m-2]=min(b[n+m-2],a[n+m-4]);
        }
        /*for(int i = 0;i<n+m-1;i++) cout<<a[i]<<" ";
        cout<<"\n";
        for(int i = 0;i<n+m-1;i++) cout<<b[i]<<" ";
        cout<<"\n";*/
        for(int i = 1;i<n+m-1;i+=2){
            ans1+=a[i];
        }
        for(int i = 1;i<n+m-1;i+=2){
            ans2+=b[i];
        }
        ans+=min(ans2,ans1);
        //cout<<ans1<< " "<<ans2<<"\n";
        ans1 = 0;
        ans2 = 0;
        for(int i = 0;i<n+m-1;i+=2){
            ans1+=a[i];
        }
        for(int i = 0;i<n+m-1;i+=2){
            ans2+=b[i];
        }
        //cout<<ans1<< " "<<ans2<<"\n";
        ans+=min(ans1,ans2);
        cout<<ans;
    }else if(n==1){
        ll ans = 0;
        for(int i = 0;i<m+n-1;i++){
            ans+=min(a[i],b[m+n-i-2]);
        }
        cout<<ans;
    }else{
        cout<<0;
    }
}
/*1 5
3 2 3 5 7
1 3 5 2 4*/

Compilation message (stderr)

colouring.cpp:5:9: warning: ISO C++11 requires whitespace after the macro name
    5 | #define ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
      |         ^~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 20
• Subtask 5: 10 / 10
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20