#include <iostream> #include <vector>

using namespace std;

vector<int> change_basket(vector<int>& baskets, const int from, const int to) { int j = to;

for (int i = from; i < j; ++i) {
	swap(baskets[i], baskets[j]);
	--j;
}

vector<int> final_baskets(baskets.size());
final_baskets = baskets;

return final_baskets;

}

int main() { cin.tie(nullptr); ios_base::sync_with_stdio(false);

int N, M;
cin >> N >> M;
vector<int> baskets(N+1);
for (int i = 1; i < baskets.size(); ++i) {
	baskets[i] = i;
}

vector<int> final_baskets(baskets.size());
for (int i = 1; i <= M; ++i) {
	int from, to;
	cin >> from >> to;
	final_baskets = change_basket(baskets, from, to);
}

for (int i = 1; i < baskets.size(); ++i) {
	cout << final_baskets[i] << " ";
}

return 0;

}

1. ~부터 ~까지 일때 변수명 from to 생성
2. iostream에는 std::swap 함수가 있음 이걸 통해서 데이터 바꾸기 쉽게 가능