SDNU 1309.啤酒和饮料

#include <cstdio>
#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
#include <cstring>
#include <queue>

using namespace std;

#define eps 1e-6

int main()
{
    double n;
    int x, y, m = 0;
    queue<int>colo;
    queue<int>drink;
    scanf("%lf", &n);
    x = n/2.3;
    for(int i = x; i >0; i--)
    {
        y = (int)((n-(i*2.3))/1.9);
        //printf("%d : %lf\n", i, y*1.9+i*2.3);
        if(fabs(y*1.9+i*2.3-n) <= eps)//为什么这个判断得不到正确的结果
            {
                printf("%d %d\n", i, y);
                m++;
            }
    }
    if(m == 0)printf("No Solution\n");
    return 0;
}