Submission #200585

#	Time	Username	Problem	Language	Result	Execution time	Memory
200585		Asrapogorgon	Sajam (COCI18_sajam)	C++14	45 / 90	362 ms	1016 KiB

sajam

#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define pb push_back
#define int long long 
const int maxn=2e3+5;
/*Almost copy pasted part :)*/
bitset <maxn> bit[maxn];
#define YES "DA"
#define NO "NE"
int32_t main(){
    int n,k;
    cin>>n>>k;
    int coun=0;
    for(int i=0;i<n;i++){
        int u=0;
        for(int j=0;j<n;j++){
            char a;
            cin>>a;
            bit[i][j]=(a=='x');
            u+=bit[i][j];
        }
        coun+=min(u,n-u);
    }
    if(coun<=k){
        cout<<YES<<endl;
        return 0;
    }
    for(int i=0;i<n;i++){
        int cnt=0;
        for(int j=0;j<n;j++){
            int z=(bit[i]^bit[j]).count();
            cnt+=min(z,n-z);
        }
        if(cnt<=k){
            cout<<YES<<endl;
            return 0;
        }
    }
    bitset<maxn> b = bit[0];
    for(int i=0;i<n;i++){
        int cnt=0;
        for(int j=0;j<n;j++){
            int cn=(bit[j]^b).count();
            cn=min(cn,n-cn);
            cnt+=cn;
        }  
        if(cnt<=k){
            cout<<YES<<endl;
            return 0;
        }
        b[i]=(1-b[i]);
    }   
    cout<<NO<<endl;
}

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