一道数学的ACM题.1514:x + 2y + 3z = nTime Limit:1000MS Memory Limit

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一道数学的ACM题.
1514:x + 2y + 3z = n
Time Limit:1000MS Memory Limit:65536K
Total Submit:229 Accepted:52
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Description
This problem is so easy:given an positive integer n,you are to find the number of solutions of the equation
x + 2y + 3z = n
where x,y,z are nonnegative integers.
Input
The input contains several lines of a positive integer n ( n < 10^6 ) followed by a zero.
Output
For each positive integer in the input output the number of solutions of the equation.
Sample Input
1
6
0
Sample Output
1
7
代码如下：
#include
#include
void solve(int x)
{
int i;
__int64 ans=0;
for (i=0;i*3

for (i=0;i*3

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