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【UVA】10881-Piotr's Ants

记得之前做过一个类似的,这里的话蚂蚁碰见掉头和碰见穿过去起始本质上都是一样的,只不过相撞之后蚂蚁对应的ID换了。

有了思路就很好模拟了。

1405804910881Piotr‘s AntsAcceptedC++0.0522014-08-18 03:53:00

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<vector>
#include<stack>
#include<queue>
#include<map>
#include<set>
#include<list>
#include<cmath>
#include<string>
#include<sstream>
#include<ctime>
using namespace std;
#define _PI acos(-1.0)
#define esp 1e-9
typedef long long LL;
typedef unsigned long long ULL;
typedef pair<int,int> pill;
/*===========================================
===============KinderRiven===================
===========================================*/
#define MAXD 10000 + 10
struct Ant{
    int pos;    /*位置*/
    int id;     /*编号*/
    int dir;    /*方向*/
    friend bool operator < (Ant p, Ant q){
        if(p.pos < q.pos)
            return true;
        else
            return false;
    }
}ant[MAXD];
int main(){
    int T;
    scanf("%d",&T);
    for(int Case = 1; Case <= T; Case ++){
        int ord[MAXD];
        int ans_pos[MAXD],ans_dir[MAXD];
        map<int,int>vis;
        memset(ans_pos,-1,sizeof(ans_pos));
        int L, t , n;
        scanf("%d%d%d",&L,&t,&n);
        for(int i = 0 ; i < n ; i++){
             char dir[5];
             scanf("%d%s",&ant[i].pos,dir);
             if(dir[0] == 'L')
                ant[i].dir = -1;
             else
                ant[i].dir = 1;
             ant[i].id = i;
        }
        sort(ant ,ant + n);
        for(int i = 0 ; i < n ; i++){
            ant[i].pos = ant[i].pos + ant[i].dir * t;
            ord[i] = ant[i].id;
        }
        sort(ant ,ant + n);
        for(int i = 0 ; i < n ; i++)
            ant[i].id = ord[i];
        for(int i = 0 ; i < n ; i++){
             int id = ant[i].id;
             if(ant[i].pos >= 0 && ant[i].pos <= L){
                  vis[ant[i].pos] ++;  /*记录改点蚂蚁数量*/
                  ans_pos[id] = ant[i].pos;
                  ans_dir[id] = ant[i].dir;
             }
        }
        printf("Case #%d:\n",Case);
        for(int i = 0 ; i < n ; i++){
            if(ans_pos[i] == -1)
                printf("Fell off\n");
            else if(vis[ans_pos[i]] > 1)
                printf("%d Turning\n",ans_pos[i]);
            else{
                printf("%d ",ans_pos[i]);
                if(ans_dir[i] == 1)
                    printf("R\n");
                else
                    printf("L\n");
            }
        }
        printf("\n");
    }
    return 0;
}