BestCoder Round #11 (Div. 2)_html/css_WEB-ITnose

Too bad, I can only go to Div2. (I can’t finish ORZ...

HDU respectively:

5054 Alice and Bob

5055 Bob and math problem

5056 Boring count

5057 Argestes and Sequence

# 1001

The meeting can only be in the middle of the coordinates.

#include<cstdio>#include<cstring>#include<string>#include<queue>#include<algorithm>#include<map>#include<stack>#include<iostream>#include<list>#include<set>#include<vector>#include<cmath>#define INF 0x7fffffff#define eps 1e-8#define LL long long#define PI 3.141592654#define CLR(a,b) memset(a,b,sizeof(a))#define FOR(i,a,b) for(int i= a;i< b ;i++)#define FOR0(i,a,b) for(int i= a;i>=b ;i--)#define debug puts("==fuck==")#define acfun std::ios::sync_with_stdio(false)#define SIZE 20+10using namespace std;int main(){    int n,m;    double x,y;    while(~scanf("%d%d%lf%lf",&n,&m,&x,&y))    {        double x1,y1,x2,y2;        x1=x,y1=y;        x2=n-x,y2=m-y;        if(abs(x1-x2)<=eps&&abs(y1-y2)<=eps)            puts("YES");        else            puts("NO");    }}

# 1002

Check the number, the solution is greedy. 🎜>I wrote it from DFS. . . No one hacked me... >Be careful with this set of data

5

1 1 0 0

10001

And this. >

# 1003 Know that the time complexity is O(n). 🎜>ORZ, I’ve been writing for a long time, but I still haven’t finished it. I’ll write it slowly this week, and hang this up first. #

# 1004 I used MLE. Is the card memory interesting? Try unsigned short and see if it can pass.

Submit it slowly. Anyway, it’s on page HDU41.

#include<cstdio>#include<cstring>#include<string>#include<queue>#include<algorithm>#include<map>#include<stack>#include<iostream>#include<list>#include<set>#include<vector>#include<cmath>#define INF 0x7fffffff#define eps 1e-8#define LL long long#define PI 3.141592654#define CLR(a,b) memset(a,b,sizeof(a))#define FOR(i,a,b) for(int i= a;i< b ;i++)#define FOR0(i,a,b) for(int i= a;i>=b ;i--)#define debug puts("==fuck==")#define acfun std::ios::sync_with_stdio(false)#define SIZE 20+10using namespace std;int a[10],n;bool cmp(int a,int b){    return a>b;}int num[101];bool outflag;void dfs(int m){    if(outflag)return;    if(m==n)    {        if(num[m-1]&1)        {            FOR(j,0,n)            printf("%d",num[j]);            printf("\n");            outflag=1;        }        else        return;    }    FOR0(j,9,0)    {        if(a[j])        {            a[j]--;            num[m]=j;            dfs(m+1);            a[j]++;        }    }}int main(){    while(~scanf("%d",&n))    {        bool flag=0;        int odd=0;        int even=0;        CLR(a,0);        outflag=0;        FOR(i,0,n)        {            int tmp;            scanf("%d",&tmp);            if(tmp&1)flag=1;            a[tmp]++;            if(tmp&1)odd++;            else if(tmp!=0)even++;        }        if(!flag||(n!=1&&odd==1&&even==0))        {            puts("-1");            continue;        }        dfs(0);    }}

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