hdu 6495 冰水挑战
表示在考虑完前 个挑战后,并且接受了 个挑战的剩余体⼒的最⼤值
首先确定我们的是越大越有利于后面。
所以我们每一次转移就是接受第 个挑战和不接受第 个挑战,
不接受的话(此时 i != j),
接受的话,
取最大,算一下就是答案
Code:
#include <bits/stdc++.h>
#define ll long long
using namespace std;
struct node
{
ll a;
ll b;
ll c;
}que[1005];
ll dp[1005][1005];
int main()
{
int T;
scanf("%d", &T);
while (T--)
{
memset(dp, 0, sizeof(dp));
int n, m;
scanf("%d%d", &n, &m);
for (int i = 1; i <= n; i++)
scanf("%lld%lld%lld", &que[i].a, &que[i].b, &que[i].c);
dp[0][0] = m;
for (int i = 1; i <= n; i++)
dp[i][0] = dp[i - 1][0] + que[i].c;
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= i; j++)
{
if (i > j)
dp[i][j] = dp[i - 1][j];
ll temp = min(dp[i - 1][j - 1], que[i].b) - que[i].a;
dp[i][j] = max(dp[i][j], temp);
if (dp[i][j] > 0)
dp[i][j] += que[i].c;
}
}
int cnt = 0;
for (int i = n; i >= 0; i--)
{
if (dp[n][i] > 0)
{
cnt = i;
break;
}
}
printf("%d\n", cnt);
}
}