UVA 10763 - Foreign Exchange
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题目大意:给出交换学生的原先国家和所去的国家,交换成功的条件是如果 A 国给 B 国一个学生,对应的 B 国也必须给 A 国一个学生,否则就是交换失败
解题思路:用两个数组分别存原先国家与所去国家,两个数组排序后进行比较,如果完全相同就输出 “YES”,否则输出 “NO”
#include <cstdio>#include <algorithm>using namespace std;int main() {int n;while (scanf("%d", &n), n) {int person_1[500000] = {0}, person_2[500000] = {0}, cnt;for (int i = 0; i < n; i++)scanf("%d%d", &person_1[i], &person_2[i]);sort(person_1, person_1 + n);sort(person_2, person_2 + n);for (cnt = 0; cnt < n; cnt++)if (person_1[cnt] != person_2[cnt])break;printf(cnt != n ? "NO\n" : "YES\n");}return 0;}
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