贪心FB

hdu 2037  今年暑假不AC

定义结构体，排序，然后贪心。

#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;

struct T{
    int s,e;
};
T program[105];
bool  cmp(struct T a,struct T b)
{
    if(a.e != b.e)
        return a.e < b.e;
}

bool Selected[105];
int main()
{
    int n;
    while(scanf("%d",&n)!=EOF && n)
    {
        for(int i = 0; i < n; i++)
        {
            scanf("%d%d",&program[i].s,&program[i].e);
        }
        sort(program,program+n,cmp);
        Selected[0] = true;
        int j = 0;
        for(int i = 1; i < n; i++)
        {
            if(program[i].s >= program[j].e)
            {
                Selected[i] = true;
                j = i;
            }
            else Selected[i] = false;
        }
        int sum = 0;
        for(int i = 0; i < n; i++)
        {
            if(Selected[i])
                sum++;
        }
        printf("%d\n",sum);
        memset(Selected,0,sizeof(Selected));
        memset(program,0,sizeof(program));
    }
    return 0;
}