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  • bzoj3709: [PA2014]Bohater(贪心)

      贪心...

      可以回血的按d[i]升序防止死掉

      不能回血的按a[i]降序,因为只考虑d我们要扣除的血量是一定的,为了不死显然回血多的放前面更好

    #include<iostream>
    #include<cstring>
    #include<cstdlib>
    #include<cstdio> 
    #include<algorithm>
    #define ll long long 
    using namespace std;
    const int maxn=500010,inf=1e9;
    struct poi{ll t,d,pos;}a[maxn],b[maxn];
    ll n,m,x,y,z,tot,cnt1,cnt2;
    void read(ll &k)
    {
        int f=1;k=0;char c=getchar();
        while(c<'0'||c>'9')c=='-'&&(f=-1),c=getchar();
        while(c<='9'&&c>='0')k=k*10+c-'0',c=getchar();
        k*=f;
    }
    bool cmp1(poi a,poi b){return a.d<b.d;}
    bool cmp2(poi a,poi b){return a.t>b.t;}
    int main()
    {
        read(n);read(z);
        for(int i=1;i<=n;i++)
        {
            read(x);read(y);
            if(x<=y)a[++cnt1].d=x,a[cnt1].t=y,a[cnt1].pos=i;
            else b[++cnt2].d=x,b[cnt2].t=y,b[cnt2].pos=i;
        }
        sort(a+1,a+1+cnt1,cmp1);
        sort(b+1,b+1+cnt2,cmp2);
        for(int i=1;i<=cnt1;i++)
        {
            z-=a[i].d;
            if(z<=0)return puts("NIE"),0;
            z+=a[i].t;
        }
        for(int i=1;i<=cnt2;i++)
        {
            z-=b[i].d;
            if(z<=0)return puts("NIE"),0;
            z+=b[i].t;
        }
        puts("TAK");
        for(int i=1;i<=cnt1;i++)printf("%lld ",a[i].pos);
        for(int i=1;i<=cnt2;i++)printf("%lld ",b[i].pos);
        return 0;
    }
    View Code
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  • 原文地址:https://www.cnblogs.com/Sakits/p/7628877.html
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