hdu 4070 福州赛区网络赛J 贪心 ***

优先发路程最长的

 1 #include<cstdio>
 2 #include<iostream>
 3 #include<algorithm>
 4 #include<cstring>
 5 #include<cmath>
 6 #include<queue>
 7 #include<map>
 8 using namespace std;
 9 #define MOD 1000000007
10 const int INF=0x3f3f3f3f;
11 const double eps=1e-5;
12 typedef long long ll;
13 #define cl(a) memset(a,0,sizeof(a))
14 #define ts printf("*****\n");
15 const int MAXN=100500;
16 int n,m,tt;
17 struct Node
18 {
19     int num,t;
20 }node[MAXN];
21 bool cmp(Node a,Node b)
22 {
23     return a.t>b.t;
24 }
25 int main()
26 {
27     int i,j,k,ca=1;
28     #ifndef ONLINE_JUDGE
29     freopen("1.in","r",stdin);
30     #endif
31     scanf("%d",&tt);
32     while(tt--)
33     {
34         printf("Case %d: ",ca++);
35         scanf("%d",&n);
36         for(i=0;i<n;i++)
37         scanf("%d%d",&node[i].num,&node[i].t);
38         sort(node,node+n,cmp);
39         int sum=0;
40         int Max=0;
41         int tot=0;
42         for(i=0;i<n;i++)
43         {
44             sum=node[i].num+node[i].t-1+tot;
45             Max=max(sum,Max);
46             tot+=node[i].num;
47
48         }
49         printf("%d\n",Max+1);
50     }
51 }