题意
Sol
本来是一道好的公式题。
然后输出只要保留两位小数？？
直接上不就赢了嘛。。
#include
#define LL long long
using namespace std;
const int MAXN = 1e6;
const double eps = 1e-3;
inline int read() {
char c = getchar(); int x = 0, f = 1;
while(c < '0' || c > '9') {if(c == '-') f = -1; c = getchar();}
while(c >= '0' && c <= '9') x = x * 10 + c - '0', c = getchar();
return x * f;
}
double A, B, C, D;
int tot = 0;
bool dcmp(double x) {
return fabs(x) <= eps;
}
void check(double k) {
if(dcmp(A * k * k * k + B * k * k + C * k + D)) printf("%.2lf ", k), tot++;
}
int main() {
scanf("%lf%lf%lf%lf", &A, &B, &C, &D);
for(double i = -100; i <= 100; i += 0.01) {
check(i);
if(tot == 3) break;
}
return 0;
}
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