Ruudukko

#include <iostream>

using namespace std;
typedef long long ll;
ll t[21][21];
int tt[21][21];
int main(){
    t[0][1]=1;
    ll k;
    cin >> k;
    int x=1, y=1, z=1;
    for(int i=1; i<=4; ++i){
        for(int j=1; j<=20; ++j){
            t[i][j]=t[i-1][j]+t[i][j-1];
            if(t[i][j]<=k && t[i][j]>z){
                z=t[i][j];
                x=i; y=j;
            }
        }
    }
    for(int i=2; i<20;++i){
        tt[x+1][i]=1;
        t[x+1][i]=0;
    }for(int i=0; i<x; ++i) {
        tt[i][y+1]=1;
        t[i][y+1]=0;
    }if(k-z==0){
        tt[x+1][1]=1;
    }
    x+=2;
    k-=z;
    z=1;
    int a=x, b=1;
    for(int i=x; i<=x+3; ++i){
        for(int j=1; j<=20; ++j){
            t[i][j]=t[i-1][j]+t[i][j-1];
            if(t[i][j]<=k && t[i][j]>z){
                z=t[i][j];
                a=i; b=j;
            }
        }
    }for(int i=2; i<20;++i){
        tt[a+1][i]=1;
        t[a+1][i]=0;
    }for(int i=x; i<a; ++i) {
        tt[i][b+1]=1;
        t[i][b+1]=0;
    }
    if(k-z==0){
        tt[a+1][1]=1;
    }
    x=a+2;
    k-=z; z=1;
    a=a+2, b=1;
    for(int i=x; i<=x+3; ++i){
        for(int j=1; j<=20; ++j){
            t[i][j]=t[i-1][j]+t[i][j-1];
            if(t[i][j]<=k && t[i][j]>z){
                z=t[i][j];
                a=i; b=j;
            }
        }
    }for(int i=1; i<20;++i){
        tt[a+1][i]=1;
        t[a+1][i]=0;
    }for(int i=x; i<a; ++i) {
        tt[i][b+1]=1;
        t[i][b+1]=0;
    }
    for(int i=1; i<=20; ++i){
        for(int j=1; j<=20; ++j) cout << (tt[i][j]==1?"#":".");
        cout << "\n";
    }
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: WRONG ANSWER

Test 13

Group: 3

Verdict: WRONG ANSWER

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER