用户输出
4.000000
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0| 编号 | 题目 | 状态 | 分数 | 总时间 | 内存 | 代码 / 答案文件 | 提交者 | 提交时间 |
|---|---|---|---|---|---|---|---|---|
| #20629 | #1030. 1-03E. JM的星系战争 | Accepted | 100 | 239 ms | 1920 K | C++ 11 / 833 B | JM233333 | 2019-07-27 19:46:18 |
#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
typedef long long ll;
bool judge();
const int MAX = 2e5 + 5;
int a[MAX], b[MAX];
int n, m;
int main() {
// freopen("test.txt", "r", stdin);
while (scanf("%d %d", &n, &m) != EOF) {
// 输入
for (int i = 1; i <= n; i++) {
scanf("%d %d", &a[i], &b[i]);
}
// 无解的情况
if (!judge()) {
printf("-1\n");
continue;
}
// 求解
double weight = m;
for (int i = 1; i <= n; i++) {
weight = (weight * a[i] / (a[i] - 1));
weight = (weight * b[i] / (b[i] - 1));
}
double res = weight - m;
// 输出
printf("%.6f\n", res);
}
return 0;
}
// 判断是否有解
bool judge() {
for (int i = 1; i <= n; i++) {
if (a[i] == 1 || b[i] == 1)
return false;
}
return true;
}
用户输出
4.000000
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0用户输出
-1
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0用户输出
85.480000
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0用户输出
284.000000
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0用户输出
159.265078
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0106 947
647 4
940 883
12 867
102 282
424 472
79 85
762 99
579 583
235 196
263 484
350 69
<835 bytes omitted>用户输出
2982.034480
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0520 396
825 67
386 870
498 473
433 81
718 722
183 477
672 826
874 485
468 632
520 833
975
<4474 bytes omitted>用户输出
1542017.250923
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0738 169
131 889
340 59
49 946
219 427
861 675
96 195
228 622
215 667
955 476
95 51
810 19
<6391 bytes omitted>用户输出
4527411.268690
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0987 682
60 423
401 779
677 116
319 821
919 588
740 251
358 231
274 312
623 796
378 933
18
<8586 bytes omitted>用户输出
-1
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0473 199
406 734
712 238
564 108
117 841
598 16
48 900
725 705
247 258
929 538
90 627
804
<4052 bytes omitted>用户输出
-1
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 059750 2281
93567 44021
47430 98340
9559 55192
27106 80521
22955 42810
48320 85590
81770 90294
<763196 bytes omitted>用户输出
745083116.771228
Special Judge 信息
OK Error:0.00001999997766688466系统信息
Exited with return code 0200000 364
4699406 7476559
3074519 9220641
9953397 4609875
5011840 8555716
9299532 7782002
680
<3363507 bytes omitted>用户输出
74.385041
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 023821 7264
75949 33096
91115 42348
81152 81964
27272 91134
28847 96689
86108 29747
30204 5578
<304247 bytes omitted>用户输出
769628.161872
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 035768 2145
55319 25036
49408 9299
49217 39951
90958 77142
44396 13466
8576 98650
36023 62002
<456877 bytes omitted>用户输出
5955028.974811
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 066177 13
14609 92016
32279 95577
60901 20717
1545 39312
82239 94186
55303 88326
52979 70206
<845575 bytes omitted>用户输出
29613563.761637
Special Judge 信息
OK Error:0.00000100000033853576系统信息
Exited with return code 0200000 182730
51203472 887121657
889997928 717080718
101945687 541029100
340190334 398852700
41
<4155289 bytes omitted>用户输出
1033.627692
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0200000 795860
187377578 44646426
558344784 913526041
339835037 509114477
549140685 797619990
22
<4155454 bytes omitted>用户输出
5247.484968
Special Judge 信息
OK Error:0.00000000000000000000系统信息
Exited with return code 0