#include <stdio.h>

/*
 * 三种鸡单价分别为 R, S, 1/T，其中 R > S
 * 花 M 钱买 N 只
 */
void calc(int R, int S, int T, int M, int N)
{
    int v = 0;
    int r = 1;
    for (; r < N && r * R < M; r++) {
        int m = M - R * r;
        int n = N - r;
        if (m >= n * S || m * T <= n) continue;

        int a = T * m - n;
        int b = T * (S * n - m);
        int c = S * T - 1;
        if (a < 0 || b < 0 || a % c || b % c) continue;

        int s = a / c;
        int t = b / c;
        printf("----- %d -----\n", ++v);
        printf("%d + %d + %d = %d\n", r, s, t, N);
        printf("%d * %d + %d * %d + %d / %d = %d\n", r, R, s, S, t, T, M);
    }
}


int main()
{
    calc(5, 3, 3, 100, 100);
    return 0;
}