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- //Nguyen Huu Hoang Minh
- #include <bits/stdc++.h>
- #define sz(x) int(x.size())
- #define all(x) x.begin(),x.end()
- #define reset(x) memset(x, 0,sizeof(x))
- #define pb push_back
- #define mp make_pair
- #define fi first
- #define se second
- #define N 2005
- #define remain(x) if (x > MOD) x -= MOD
- #define ii pair<int, int>
- #define iiii pair< ii , ii >
- #define viiii vector< iiii >
- #define vi vector<int>
- #define vii vector< ii >
- #define bit(x, i) (((x) >> (i)) & 1)
- #define Task "test"
- #define int long long
- using namespace std;
- typedef long double ld;
- const int inf = 1e10;
- const int minf = -1e10;
- const int mod = 5000000;
- int n, f[10005][55];
- int a[10005];
- int bit[10005][55];
- int k;
- void readfile()
- {
- ios_base::sync_with_stdio(false);
- cin.tie(0);cout.tie(0);
- if (fopen(Task".inp","r"))
- {
- freopen(Task".inp","r",stdin);
- //freopen(Task".out","w",stdout);
- }
- cin >> n >> k;
- for(int i=1; i<=n; i++) cin >> a[i];
- if (k > n){
- cout << 0;
- exit(0);
- }
- }
- void up(int i, int x, int k)
- {
- for(; i <= 10000; i += i & -i) bit[i][k] = (bit[i][k] + x)%mod;
- }
- int getsum(int x, int k)
- {
- int ans = 0;
- for(; x > 0; x -= x & -x) ans += bit[x][k];
- return ans%mod;
- }
- void compress()
- {
- set<int> s(a+1,a+1+n);
- vector<int> b(s.begin(),s.end());
- for(int i=1; i<=n; i++)
- {
- int k = lower_bound(b.begin(),b.end(),a[i])-b.begin();
- a[i] = k+1;
- }
- }
- void proc()
- {
- compress();
- for(int i=1; i<=n; i++)
- for(int l=1; l<=k; l++)
- if (l==1)
- {
- f[i][l]=1;
- up(a[i],f[i][l],l);
- }
- else{
- (f[i][l] += getsum(a[i]-1,l-1))%=mod;
- up(a[i],f[i][l],l);
- }
- int res=0;
- for(int i=k; i<=n; i++) res = (res + f[i][k])%mod;
- cout << res;
- }
- signed main()
- {
- readfile();
- proc();
- return 0;
- }
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