Gym - 100543L
https://vjudge.net/problem/153854/origin
区间dp,要从区间长度为1开始dp

#include<iostream>
#include<cstdio>
#include<queue>
#include<algorithm>
#include<cmath>
#include<ctime>
#include<set>
#include<map>
#include<stack>
#include<cstring>
#define inf 2147483647
#define ls rt<<1
#define rs rt<<1|1
#define lson ls,nl,mid,l,r
#define rson rs,mid+1,nr,l,r
#define N 1010
#define For(i,a,b) for(long long i=a;i<=b;i++)
#define p(a) putchar(a)
#define g() getchar() using namespace std;
long long T;
long long n,m;
struct node{
long long l;
long long r;
long long w;
}a[N];
long long b[N],id,Max;
long long f[N][N];
void in(long long &x){
long long y=;
char c=g();x=;
while(c<''||c>''){
if(c=='-')y=-;
c=g();
}
while(c<=''&&c>=''){
x=(x<<)+(x<<)+c-'';c=g();
}
x*=y;
}
void o(long long x){
if(x<){
p('-');
x=-x;
}
if(x>)o(x/);
p(x%+'');
} void clear(){
m=;
//memset(f,0,sizeof(f));
} int main(){
in(T);
while(T--){
clear();
in(n);
For(i,,n){
in(a[i].l);in(a[i].r);in(a[i].w);
b[++m]=a[i].l;
b[++m]=a[i].r;
}
sort(b+,b+m+);
m=unique(b+,b+m+)-b-;
For(i,,n){
a[i].l=lower_bound(b+,b+m+,a[i].l)-b;
a[i].r=lower_bound(b+,b+m+,a[i].r)-b;
}
For(len,,m)
For(l,,m-len+){
int r=l+len-;
id=;
For(i,,n)
if(a[i].l>=l&&a[i].r<=r)
if(id==||a[i].w>a[id].w)
id=i;
if(id==){
f[l][r]=;
continue;
}
f[l][r]=inf;
For(i,a[id].l,a[id].r)
f[l][r]=min(f[l][r],f[l][i-]+f[i+][r]+a[id].w);
}
o(f[][m]);p('\n');
}
return ;
}

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