感想

就很讨厌ZX！！

C++ 代码

#include<iostream>
#include<cmath>
#include<cstring>

using namespace std;

const int N = 60;

double ants[N], pos[110];
int n, finish;
bool cold[N] = {1};

int main()
{
    cin >> n;
    for(int i = 0; i < n; i ++)
        cin >> ants[i];


    int res = 1;
    while(1)
    {
        finish = 0;

        //先让蚂蚁走！！
        for(int i = 0; i < n; i ++)
        {
            if(fabs(ants[i]) >= 100 || ants[i] == 0)
                finish ++;
            else    ants[i] += 0.5;
        }

        if(n == finish) break;

        //判断蚂蚁碰没碰上
        for(int i = 0; i < n; i ++)
        {
            double pos1 = ants[i];
            if(pos1 == 0 || fabs(pos1) >= 100)    continue;
            for(int j = i + 1; j < n; j ++)
            {
                double pos2 = ants[j];
                if(pos2 == 0 || fabs(pos2) >= 100)    continue;

                if(fabs(pos1) == fabs(pos2))
                {
                    if(!cold[i] && cold[j])
                    {
                        cold[i] = true;
                        res ++;
                        // cout << "在" << pos1 <<"位置上" << i << "感冒了" << endl; 
                    }
                    if(cold[i] && !cold[j])
                    {
                        cold[j] = true;
                        // cout << "在" << pos2 <<"位置上" << j << "感冒了" << endl; 
                        res ++;
                    }
                    ants[i] = -ants[i];
                    ants[j] = -ants[j];
                }
            }
        }
    }

    cout << res << endl;
}