baekjoon 10814

https://www.acmicpc.net/problem/10814

Idea

가입한 순서대로 숫자를 입력해주고 비교하며 qsort를 써주면 됨.
qsort짱짱맨

Code

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct _Person {
	char name[101];
	int idx;
	int age;
}Person;

int compare(const void* a, const void* b);

int main(void) {
	int N;
	
	scanf("%d", &N);

	Person* arr = (Person*)calloc(N + 1, sizeof(Person));

	for (int i = 0; i < N; i++) {
		scanf("%d", &arr[i].age);
		scanf("%s", arr[i].name);
		arr[i].idx = i;
	}

	qsort(arr, N, sizeof(arr[0]), compare);

	for (int i = 0; i < N; i++) {
		printf("%d %s\n", arr[i].age, arr[i].name);
	}

	return 0;
}

int compare(const void* a, const void* b) {
	Person A = *(Person*)a;
	Person B = *(Person*)b;

	if (A.age < B.age) {
		return -1;
	}
	else if (A.age == B.age) {
		if (A.idx < B.idx) {
			return -1;
		}
		else {
			return 1;
		}
	}
	else {
		return 1;
	}

	return 0;
}