1 #include <iostream> 2 #include <algorithm> 3 #include <cstring> 4 using namespace std; 5  6 const int size = 110; 7 struct node 8 { 9     int st;10     int end;11     int price;12 }data[size*10];13 int dp[size];14 bool cmp( const node a , const node b )15 {16     return a.end < b.end;17 }18 19 int main()20 {21     cin.sync_with_stdio(false);22     int t , n , m , cnt;23     int a , b , c;24     cin >> t;25     while(t--)26     {27         cin >> m >> n;28         cnt = 0;29         memset( dp , 0 , sizeof(dp) );30         for( int i = 0 ; i<n ; i++ )31         {32             cin >> a >> b >> c;33             if( a<=m && b<=m )34             {35                 data[cnt].st = a;36                 data[cnt].end = b;37                 data[cnt++].price = c;38             }39         }40         sort( data , data+cnt , cmp );41         for( int i = 0 ; i<cnt ; i++ )42         {43             for( int j = m ; j>=data[i].end ; j-- )44             {45                 dp[j] = max( dp[j] , dp[ data[i].st-1 ] + data[i].price );46             }47         }48         cout << dp[m] << endl;49     }50     return 0;51 }