有两种理解方法。虽然对于相同的数据有不同的输出,但据说都能过。但是我的其中一个没过。
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#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
using namespace std;
#define maxn 30005
int n, m;
int f[maxn], sum[maxn];
int main()
{
//freopen("t.txt", "r", stdin);
scanf("%d%d", &n, &m);
for (int i = 1; i <= n; i++)
scanf("%d", &f[i]);
for (int i = 1; i <= n; i++)
f[i] = f[i] % m;
int ans = 0;
for (int i = 1; i <= n; i++)
if (f[i] != 0)
ans = max(ans, m - f[i]);
printf("%d\n", ans);
return 0;
}