【CodeForces 602A】C - 特别水的题3-Two Bases
2015-12-14 14:58
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http://acm.hust.edu.cn/vjudge/contest/view.action?cid=102271#problem/C
Description
After seeing the "ALL YOUR BASE ARE BELONG TO US" meme for the first time, numbers X and Y realised that they have different bases, which complicated their relations.
You're given a number X represented in base bx and a number Y represented in base by. Compare those two numbers.
Input
The first line of the input contains two space-separated integers n and bx (1 ≤ n ≤ 10, 2 ≤ bx ≤ 40), where n is the number of digits in the bx-based representation of X.
The second line contains n space-separated integers x1, x2, ..., xn (0 ≤ xi < bx) — the digits of X. They are given in the order from the most significant digit to the least significant one.
The following two lines describe Y in the same way: the third line contains two space-separated integers m and by (1 ≤ m ≤ 10, 2 ≤ by ≤ 40, bx ≠ by), where m is the number of digits in the by-based representation of Y, and the fourth line contains m space-separated integers y1, y2, ..., ym (0 ≤ yi < by) — the digits of Y.
There will be no leading zeroes. Both X and Y will be positive. All digits of both numbers are given in the standard decimal numeral system.
Output
Output a single character (quotes for clarity):
'<' if X < Y
'>' if X > Y
'=' if X = Y
Sample Input
Input
Output
Input
Output
Input
Output
Hint
In the first sample, X = 1011112 = 4710 = Y.
In the second sample, X = 1023 = 215 and Y = 245 = 1123, thus X < Y.
In the third sample,
and Y = 48031509. We may notice that X starts with much larger digits and bx is much larger than by, so X is clearly larger than Y.
转换进制,一边读入一边转为十进制,再比较大小。
Description
After seeing the "ALL YOUR BASE ARE BELONG TO US" meme for the first time, numbers X and Y realised that they have different bases, which complicated their relations.
You're given a number X represented in base bx and a number Y represented in base by. Compare those two numbers.
Input
The first line of the input contains two space-separated integers n and bx (1 ≤ n ≤ 10, 2 ≤ bx ≤ 40), where n is the number of digits in the bx-based representation of X.
The second line contains n space-separated integers x1, x2, ..., xn (0 ≤ xi < bx) — the digits of X. They are given in the order from the most significant digit to the least significant one.
The following two lines describe Y in the same way: the third line contains two space-separated integers m and by (1 ≤ m ≤ 10, 2 ≤ by ≤ 40, bx ≠ by), where m is the number of digits in the by-based representation of Y, and the fourth line contains m space-separated integers y1, y2, ..., ym (0 ≤ yi < by) — the digits of Y.
There will be no leading zeroes. Both X and Y will be positive. All digits of both numbers are given in the standard decimal numeral system.
Output
Output a single character (quotes for clarity):
'<' if X < Y
'>' if X > Y
'=' if X = Y
Sample Input
Input
6 2 1 0 1 1 1 1 2 10 4 7
Output
=
Input
3 3 1 0 2 2 5 2 4
Output
<
Input
7 16 15 15 4 0 0 7 10 7 9 4 8 0 3 1 5 0
Output
>
Hint
In the first sample, X = 1011112 = 4710 = Y.
In the second sample, X = 1023 = 215 and Y = 245 = 1123, thus X < Y.
In the third sample,
and Y = 48031509. We may notice that X starts with much larger digits and bx is much larger than by, so X is clearly larger than Y.
转换进制,一边读入一边转为十进制,再比较大小。
#include<stdio.h> long long x,y,bx,by,num,decx,decy; int main(){ scanf("%lld%lld",&x,&bx); for(int i=0;i<x-1;i++){ scanf("%lld",&num); decx=(decx+num)*bx; } scanf("%lld",&num); decx=decx+num; scanf("%lld%lld",&y,&by); for(int i=0;i<y-1;i++){ scanf("%lld",&num); decy=(decy+num)*by; } scanf("%lld",&num); decy=decy+num; if(decx>decy)printf(">\n"); else if(decx<decy)printf("<\n"); else printf("=\n"); return 0; }
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