#include #include using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf 1000000000 int main(){ int N; cin>>N; long long M; cin>>M; vector B(N); vector> CA(N); rep(i,N){ long long a,b,c; scanf("%lld %lld %lld",&a,&b,&c); B[i] = b; if(a>c)swap(c,a); CA[i] = make_pair(c,a); } sort(B.begin(),B.end()); sort(CA.begin(),CA.end()); long long ans= -1; rep(i,N+1){ multiset S; long long cur = 0LL; rep(j,N){ if(j t; for(int j=N-1;j>=0;j--){ auto it = S.lower_bound(CA[j].second); if(it==S.begin()){ t.push_back(CA[j].first); } else{ it--; cur += CA[j].first; S.erase(it); } } reverse(t.begin(),t.end()); if(S.size()==0){ bool f = true; for(int j=0;jt[j])continue; f=false; break; } if(f)ans = max(ans,cur); } } if(ans==-1){ cout<<"NO"<