Perpetuum Mobile Gym - 101873E

 https://cn.vjudge.net/problem/Gym-101873E

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
//#include 
#include 
//#include
using namespace std;

#define sfi(i) scanf("%d",&i)
#define sfl(i) scanf("%I64d",&i)
#define sfs(i) scanf("%s",(i))
#define pri(i) printf("%d\n",i)
#define prl(i) printf("%I64d\n",i)
#define sff(i) scanf("%lf",&i)
#define ll long long
#define ull unsigned long long
#define uint unsigned int
#define mem(x,y) memset(x,y,sizeof(x))
#define INF 0x3f3f3f3f
#define inf 1e18
#define eps 1e-10
#define PI acos(-1.0)
#define lowbit(x) ((x)&(-x))
#define fl() printf("flag\n")
#define MOD(x) ((x%mod)+mod)%mod
#define endl '\n'
#define pb push_back
#define lson (rt<<1)
#define rson (rt<<1|1)
#define FAST_IO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0)

templateinline void read(T &x)
{
    x=0;
    static int p;p=1;
    static char c;c=getchar();
    while(!isdigit(c)){if(c=='-')p=-1;c=getchar();}
    while(isdigit(c)) {x=(x<<1)+(x<<3)+(c-48);c=getchar();}
    x*=p;
}

//-----------------------------------------------

const int maxn=4e3+9;
const int mod=1e9+7;

struct E
{
    int to;
    double w;
};
vector g[maxn];

bool use[maxn];
bool vis[maxn];
double dis[maxn];
int n,m;
bool spfa(int u)
{
    use[u]=1;
    vis[u]=1;
    for(auto x:g[u])
    {
        int v=x.to;
        double w=x.w;
        if(dis[v]>n>>m;

    for(int i=0;i>a>>b>>c;
        g[a].pb({b,log(c)});
    }

    bool f=1;
    for(int i=1;i<=n;i++)
    {
        for(int z=0;z<=n;z++) vis[z]=0,dis[z]=0;
        if(!use[i])
        {
            if(spfa(i))
            {
                f=0;
                break;
            }
        }
    }

    if(!f) cout<<"inadmissible\n";
    else cout<<"admissible\n";

    return 0;
}

 

你可能感兴趣的:(spfa)