1257: You are my brother

時間限制:?1 Sec??內存限制:?128 MB
提交:?39??解決:?15
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題目描述

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Little A gets to know a new friend, Little B, recently. One day, they realize that they are family 500 years ago. Now, Little A wants to know whether Little B is his elder, younger or brother.

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輸入

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There are multiple test cases.

For each test case, the first line has a single integer, n (n<=1000). The next n lines have two integers a and b (1<=a,b<=2000) each, indicating b is the father of a. One person has exactly one father, of course. Little A is numbered 1 and Little B is numbered 2.

Proceed to the end of file.

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輸出

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For each test case, if Little B is Little A’s younger, print “You are my younger”. Otherwise, if Little B is Little A’s elder, print “You are my elder”. Otherwise, print “You are my brother”. The output for each test case occupied exactly one line.

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樣例輸入

5 1 3 2 4 3 5 4 6 5 6 6 1 3 2 4 3 5 4 6 5 7 6 7

樣例輸出

You are my elder You are my brother
#include<iostream> #include<cstring> #include<cstdio>using namespace std;int pre[2005]; void Solve(){int cnta = 0, cntb = 0, a = 1, b = 2;while(pre[a]){cnta += 1;a = pre[a];}while(pre[b]){cntb += 1;b = pre[b];}if(cnta == cntb) printf("You are my brother\n");else printf("%s\n", cnta < cntb?"You are my younger":"You are my elder"); } int main(){int n;while(scanf("%d", &n) == 1){int a, b;memset(pre, 0, sizeof(pre));for(int i = 0; i < n; i++){scanf("%d %d", &a, &b);pre[a] = b;}Solve();} }

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轉載于:https://www.cnblogs.com/Pretty9/p/7406773.html

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