SimuladoProva2.java

class SimuladoProva2 {
  public static int [] criaVetor(int n) {
    int [] v = new int [n];
    for (int i=0; i<n; i++) {
      v[i] = i+1;
    }
    for (int i=0; i<n; i++) {
      v[i] = v[(int)Math.sqrt(i)]*2;
    }
    return v;
  }
  
  public static int [][] Bagunca(int [][] A) {
    int m = A.length;
    int n = A[0].length;
    
    int [][] B = new int [m][n];
    
    for (int i=0;i<m;i++) {
      for (int j=0;j<n;j++) {
        if (i==j && j==n-1-i) {
          B[i][j] = A[i][j];
        } else if (i==j) {
          B[i][j] = 2*A[i][j];
        } else if (j==n-1-i) {
          B[i][j] = A[i][j]/2;
        } else {
          B[i][j] = 2*A[i][j] + 1;
        }
      }
    }
    return B;
  }
  
  public static int Conta0(String s) {
    int conta = 0;
    for (int i=0;i<s.length();i++) {
      if (s.charAt(i) == '0') conta++;
    }
    return conta;
  }
  
  public static void main(String[] args) {
    
    /* 1o. exercicio */
    int [] v = criaVetor(10);
    for (int i=0;i<10;i++) {
      System.out.print(v[i]+" ");
    }
    System.out.println();
    
    /* 2o. exercicio */
    int [][] A = { {1,2,3}, {4,5,6}, {7,8,9} };
    int [][] B = Bagunca(A);
    for (int i=0;i<3;i++) {
      for (int j=0;j<3;j++) {
        System.out.print(B[i][j]+" "); 
      }
      System.out.println();
    }
    
    /* 3o. exercicio */
    System.out.println(Conta0("quantos 0 vc vai encontrar na string 0?"));
  }
}