Number of way to render an amount of money
1
I made an algorithm to train my skill in dynamic programming and I would like to have feed back on it. This algorithm takes a money system (int) and have a certain amount of money to render.
Do you see any problems in this code?
public static int wayToRenderMemo(int array, int i, double cost, HashMap memo) {
if(i>=array.length) {
return 0;
}
else if(cost < 0) {
return 0;
}
else if(cost == 0) {
return 1;
}
else if(memo.containsKey(String.valueOf(i)+":"+String.valueOf(cost))) {
return (int) memo.get(String.valueOf(i)+":"+String.valueOf(cost));
}
else {
int res = 0;
for(int j = 0; j < array.length; j++) {
res += wayToRenderMemo(array, i+j, cost-array[j], memo);
}
memo.put(String.valueOf(i)+":"+String.valueOf(cost), res);
return res;
}
}
public static void main(String args) {
int array = {1, 2, 5, 10, 20, 50, 100};
double amountOfMoneyToRender = 20;
System.out.println("Number of way to render "+amountOfMoneyToRender+"€ with the following system : "+Arrays.toString(array));
HashMap memo = new HashMap();
long t3 = System.currentTimeMillis();
System.out.println(wayToRenderMemo(array, 0, amountOfMoneyToRender, memo));
long t4 = System.currentTimeMillis();
double time2 = (t4-t3)/1000.0;
System.out.println("Result found in : "+time2+"seconds");
}
java dynamic-programming memoization
edited 6 mins ago
Jamal♦
30.2k11116226
asked 3 hours ago
J. Toulmonde
61
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1
I made an algorithm to train my skill in dynamic programming and I would like to have feed back on it. This algorithm takes a money system (int) and have a certain amount of money to render.
Do you see any problems in this code?
public static int wayToRenderMemo(int array, int i, double cost, HashMap memo) {
if(i>=array.length) {
return 0;
}
else if(cost < 0) {
return 0;
}
else if(cost == 0) {
return 1;
}
else if(memo.containsKey(String.valueOf(i)+":"+String.valueOf(cost))) {
return (int) memo.get(String.valueOf(i)+":"+String.valueOf(cost));
}
else {
int res = 0;
for(int j = 0; j < array.length; j++) {
res += wayToRenderMemo(array, i+j, cost-array[j], memo);
}
memo.put(String.valueOf(i)+":"+String.valueOf(cost), res);
return res;
}
}
public static void main(String args) {
int array = {1, 2, 5, 10, 20, 50, 100};
double amountOfMoneyToRender = 20;
System.out.println("Number of way to render "+amountOfMoneyToRender+"€ with the following system : "+Arrays.toString(array));
HashMap memo = new HashMap();
long t3 = System.currentTimeMillis();
System.out.println(wayToRenderMemo(array, 0, amountOfMoneyToRender, memo));
long t4 = System.currentTimeMillis();
double time2 = (t4-t3)/1000.0;
System.out.println("Result found in : "+time2+"seconds");
}
java dynamic-programming memoization
edited 6 mins ago
Jamal♦
30.2k11116226
asked 3 hours ago
J. Toulmonde
61
New contributor
J. Toulmonde is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
1
1
1
I made an algorithm to train my skill in dynamic programming and I would like to have feed back on it. This algorithm takes a money system (int) and have a certain amount of money to render.
Do you see any problems in this code?
public static int wayToRenderMemo(int array, int i, double cost, HashMap memo) {
if(i>=array.length) {
return 0;
}
else if(cost < 0) {
return 0;
}
else if(cost == 0) {
return 1;
}
else if(memo.containsKey(String.valueOf(i)+":"+String.valueOf(cost))) {
return (int) memo.get(String.valueOf(i)+":"+String.valueOf(cost));
}
else {
int res = 0;
for(int j = 0; j < array.length; j++) {
res += wayToRenderMemo(array, i+j, cost-array[j], memo);
}
memo.put(String.valueOf(i)+":"+String.valueOf(cost), res);
return res;
}
}
public static void main(String args) {
int array = {1, 2, 5, 10, 20, 50, 100};
double amountOfMoneyToRender = 20;
System.out.println("Number of way to render "+amountOfMoneyToRender+"€ with the following system : "+Arrays.toString(array));
HashMap memo = new HashMap();
long t3 = System.currentTimeMillis();
System.out.println(wayToRenderMemo(array, 0, amountOfMoneyToRender, memo));
long t4 = System.currentTimeMillis();
double time2 = (t4-t3)/1000.0;
System.out.println("Result found in : "+time2+"seconds");
}
java dynamic-programming memoization
edited 6 mins ago
Jamal♦
30.2k11116226
asked 3 hours ago
J. Toulmonde
61
New contributor
J. Toulmonde is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I made an algorithm to train my skill in dynamic programming and I would like to have feed back on it. This algorithm takes a money system (int) and have a certain amount of money to render.
Do you see any problems in this code?
public static int wayToRenderMemo(int array, int i, double cost, HashMap memo) {
if(i>=array.length) {
return 0;
}
else if(cost < 0) {
return 0;
}
else if(cost == 0) {
return 1;
}
else if(memo.containsKey(String.valueOf(i)+":"+String.valueOf(cost))) {
return (int) memo.get(String.valueOf(i)+":"+String.valueOf(cost));
}
else {
int res = 0;
for(int j = 0; j < array.length; j++) {
res += wayToRenderMemo(array, i+j, cost-array[j], memo);
}
memo.put(String.valueOf(i)+":"+String.valueOf(cost), res);
return res;
}
}
public static void main(String args) {
int array = {1, 2, 5, 10, 20, 50, 100};
double amountOfMoneyToRender = 20;
System.out.println("Number of way to render "+amountOfMoneyToRender+"€ with the following system : "+Arrays.toString(array));
HashMap memo = new HashMap();
long t3 = System.currentTimeMillis();
System.out.println(wayToRenderMemo(array, 0, amountOfMoneyToRender, memo));
long t4 = System.currentTimeMillis();
double time2 = (t4-t3)/1000.0;
System.out.println("Result found in : "+time2+"seconds");
}
java dynamic-programming memoization
java dynamic-programming memoization
edited 6 mins ago
Jamal♦
30.2k11116226
asked 3 hours ago
J. Toulmonde
61
New contributor
J. Toulmonde is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 6 mins ago
Jamal♦
30.2k11116226
asked 3 hours ago
J. Toulmonde
61
New contributor
J. Toulmonde is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 6 mins ago
Jamal♦
30.2k11116226
edited 6 mins ago
Jamal♦
30.2k11116226
edited 6 mins ago
Jamal♦
30.2k11116226
30.2k11116226
asked 3 hours ago
J. Toulmonde
61
New contributor
J. Toulmonde is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
J. Toulmonde
61
asked 3 hours ago
J. Toulmonde
61
61
New contributor
J. Toulmonde is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
J. Toulmonde is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
J. Toulmonde is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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