uva 357 Let Me Count The Ways(01背包)

时间:2023-03-09 15:59:07
uva 357 Let Me Count The Ways(01背包)

题目连接:357 - Let Me Count The Ways

题目大意:有5种硬币, 面值分别为1、5、10、25、50,现在给出金额,问可以用多少种方式组成该面值。

解题思路:和uva674是一样的, 只是上限不一样, 还有注意下输出。

#include <stdio.h>
#include <string.h>
const int N = 30005;
const int val[5] = {1, 5, 10, 25, 50}; long long cnt[N]; void Init() {
memset(cnt, 0, sizeof(cnt));
cnt[0] = 1;
for (int i = 0; i < 5; i++) {
for (int j = val[i]; j < N; j++)
cnt[j] += cnt[j - val[i]];
}
} int main() {
Init();
int n;
while (scanf("%d", &n) == 1) {
if (cnt[n] <= 1)
printf("There is only 1 way to produce %d cents change.\n", n);
else
printf("There are %lld ways to produce %d cents change.\n", cnt[n], n);
}
return 0;
}