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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#611430 | #5507. Investors | QHhee004 | RE | 0ms | 0kb | C++17 | 2.0kb | 2024-10-04 21:00:47 | 2024-10-04 21:00:47 |
answer
#include<iostream>
#include<map>
#include<algorithm>
#include<set>
#include<queue>
using namespace std;
const int inf=1e9+7,N=6005;
int n,m,R[N];
int tot,a[N],b[N],f[N][N],excel[N][N];
#define lowbit(x) x&-x
class Tree_Array {
private:
int bit[N];
public:
void assign(Tree_Array &t) {
for(int i=1; i<=n; i++)
bit[i]=t.bit[i];
}
void set(int t) {
for(int i=0; i<=n; i++)
bit[i]=t;
}
void add_mn(int x,int t) {
while(x)bit[x]=min(bit[x],t),x-=lowbit(x);
}
int get_mn(int x) {
int ans=inf;
while(x<=n)ans=min(bit[x],ans),x+=lowbit(x);
return ans;
}
void add(int x,int y) {
while(x)bit[x]+=y,x-=lowbit(x);
}
int get(int x) {
int sum=0;
while(x<=n)sum+=bit[x],x+=lowbit(x);
return sum;
}
} bit1,bit2;
void prepare() {
scanf("%d%d",&n,&m);
for(int i=1; i<=n; i++) {
scanf("%d",&a[i]);b[i]=a[i];
}
map<int,int>F;
tot=0;
sort(b+1,b+1+n);
for(int i=1; i<=n; i++)
if(F[b[i]]==0)F[b[i]]=++tot;
for(int i=1; i<=n; i++)a[i]=F[a[i]];
}
void Get_f() {
for(int L=1; L<=n; L++) {
bit1.set(0);
bit1.add(a[L],1);
for(int R=L+1; R<=n; R++) {
f[L][R]=f[L][R-1]+bit1.get(a[R]+1);
bit1.add(a[R],1);
}
}
}
int res[N][N];
void Get_ans() {
bit1.set(inf);
bit2.set(inf);
for(int i=0; i<=n+1; i++)
for(int j=0; j<=n+1; j++)
res[i][j]=inf;
res[0][1]=0;
for(int i=0; i<=n; i++)R[i]=0;
for(int c=0; c<=m; c++) {
int t=c+1;R[n+1]=n;
for(int j=n; j>c; j--) {
int tmp=R[j];
for(int k=R[j+1]; k>=tmp; k--) {
if(res[c][k]+f[k][j]<res[c+1][j+1]) {
R[j]=k,t=k;
res[c+1][j+1]=min(res[c+1][j+1],res[c][t]+f[t][j]);
// printf("res[%d][%d]=%d\n",c+1,j+1,res[c+1][j+1]);
}
}
}
}
printf("%d\n",res[m+1][n+1]);
}
void solve() {
prepare();
Get_f();
Get_ans();
}
int main() {
freopen("data.in","r",stdin);
freopen("my.out","w",stdout);
int T;scanf("%d",&T);
while(T--) solve();
fclose(stdin);
fclose(stdout);
return 0;
}
Details
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Test #1:
score: 0
Dangerous Syscalls
input:
2 6 1 4 5 6 2 2 1 6 2 4 5 6 2 2 1