AOJ 0004 Simultaneous Equation
だいたい11'ぐらい。手元でチマチマ方程式を解いただけ。
#include <cstdio> int main(){ int a, b, c, d, e, f; double x, y; while(scanf("%d %d %d %d %d %d\n", &a, &b, &c, &d, &e, &f) != EOF){ y = (double)(a * f - c * d) / (double)(a * e - b * d); x = ((double)c - (double)b * y) / (double)a; printf("%.3f %.3f\n", x, y); } return 0; }