mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
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#include <iostream>
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#include <cstdio>
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#include <string.h>
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#include <algorithm>
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using namespace std;
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struct Order
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{
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int s;
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int e;
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int p;
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}ord[23];
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int n, NumB, NumOrd;
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int MaxEarn, CurEarn, off[8];
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int cmp (const void *aa, const void *bb)
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{
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struct Order *a=(Order*) aa;
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struct Order *b=(Order*) bb;
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if(a -> s != b -> s) return a -> s - b -> s;
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else return a -> e - a -> e;
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}
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void DFS (int num,int tolp)
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{
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if (num == NumOrd)
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{
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if (MaxEarn < CurEarn) MaxEarn = CurEarn;
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return ;
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}
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else
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{
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if (num > 0)
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for (int i = ord[num - 1].s + 1; i <= ord[num].s; i++)
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{
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tolp -= off[i];
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}
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tolp += ord[num].p;
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if (tolp <= n)
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{
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CurEarn += (ord[num].e - ord[num].s) * ord[num].p;
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off[ord[num].e] += ord[num].p;
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DFS(num + 1, tolp);
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CurEarn -= (ord[num].e - ord[num].s) * ord[num].p;
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off[ord[num].e] -= ord[num].p;
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}
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tolp -= ord[num].p;
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DFS (num + 1, tolp);
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}
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return ;
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}
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int main()
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{
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while (scanf("%d %d %d", &n, &NumB, &NumOrd) && (n || NumB || NumOrd))
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{
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memset(off, 0, sizeof(off));
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MaxEarn = 0; CurEarn = 0;
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for (int i = 0; i < NumOrd; i++)
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{
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scanf("%d %d %d", &ord[i].s, &ord[i].e, &ord[i].p);
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}
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qsort (ord, NumOrd, sizeof(ord[0]), cmp);
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DFS(0,0);
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printf("%d\n", MaxEarn);
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}
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return 0;
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}
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