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coinChange_322.c
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coinChange_322.c
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int min_amount;
int coinChange(int* coins, int coinsSize, int amount) {
int times[amount + 1];
void coinChangeAux(int *, int, int, int *);
int min(int *list, int listSize);
int i;
if (amount == 0)
{
return 0;
}
min_amount = min(coins, coinsSize);
if (amount < min_amount)
{
return -1;
}
else if (amount == min_amount)
{
return 1;
}
for (i = 0; i <= amount; i++)
{
times[i] = -2;
}
coinChangeAux(coins, coinsSize, amount, times);
return times[amount];
}
void coinChangeAux(int *coins, int coinsSize, int amount, int *times)
{
int i;
int coin;
int remain;
times[amount] = INT_MAX;
for (i = 0; i < coinsSize; i++)
{
coin = coins[i];
if (coin == amount)
{
times[amount] = 1;
break;
}
else if ((remain = amount - coin) >= min_amount)
{
if (times[remain] == -2)
{
coinChangeAux(coins, coinsSize, remain, times);
}
if (times[remain] != -1)
{
if (1 + times[remain] < times[amount])
{
times[amount] = 1 + times[remain];
}
}
}
}
if (times[amount] == INT_MAX)
{
times[amount] = -1;
}
}
int min(int *list, int listSize)
{
int minimum = INT_MAX;
int i;
for (i = 0; i < listSize; i++)
{
if (list[i] < minimum)
{
minimum = list[i];
}
}
return minimum;
}
if amount == 0:
return 0
min_amount = min(coins)
if amount < min_amount:
return -1
elif amount == min_amount:
return 1
times = [-1] * (amount + 1)
for i in range(min_amount + 1, amount + 1):
times[i] = float("Inf")
for coin in coins:
if coin == i:
times[i] = 1
break
else:
remain = i - coin
if remain >= min_amount and times[remain] != -1:
times[i] = min(times[i], 1 + times[remain])
if times[i] == float("Inf"):
times[i] = -1
return times[amount]