Submission #491481

#	Time	Username	Problem	Language	Result	Execution time	Memory
491481		patrikpavic2	Employment (JOI16_employment)	C++17	100 / 100	237 ms	12308 KiB

employment

#include <cstdio>
#include <vector>
#include <algorithm>

#define PB push_back

using namespace std;

int n, q;

const int N = 4e5 + 500;

int loga[N], A[N];

void add(int x, int y){
	for(x += 10; x < N ; x += x & -x)
		loga[x] += y;
}

int query(int x){
	int ret = 0;
	for(x += 10; x ; x -= x & -x)
		ret += loga[x];
	return ret;
}

vector < int > saz;
int ty[N], pos[N], B[N];

void dodaj(int i, int kof){
	add(min(A[i], A[i + 1]) + 1, kof); add(max(A[i], A[i + 1]) + 1, -kof);
}

int main(){
	scanf("%d%d", &n, &q);
	saz.PB(0);
	for(int i = 1;i <= n;i++){
		scanf("%d", A + i);
		saz.PB(A[i]);
	}
	for(int i = 0;i < q;i++){
		scanf("%d", ty + i);
		if(ty[i] - 1) 
			scanf("%d", pos + i);
		scanf("%d", B + i);
		saz.PB(B[i]);
	}
	sort(saz.begin(), saz.end());
	saz.erase(unique(saz.begin(), saz.end()), saz.end());
	for(int i = 1;i <= n;i++)
		A[i] = lower_bound(saz.begin(), saz.end(), A[i]) - saz.begin();
	for(int i = 0;i <= n;i++){
		dodaj(i, 1);
	}
	for(int i = 0;i < q;i++){
		B[i] = lower_bound(saz.begin(), saz.end(), B[i]) - saz.begin();
		if(ty[i] - 1){
			dodaj(pos[i] - 1, -1); dodaj(pos[i], -1);
			A[pos[i]] = B[i];
			dodaj(pos[i] - 1, 1); dodaj(pos[i], 1);
		}
		else
			printf("%d\n", query(B[i]) / 2);
	}
	return 0;
}

Compilation message (stderr)

employment.cpp: In function 'int main()':
employment.cpp:35:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |  scanf("%d%d", &n, &q);
      |  ~~~~~^~~~~~~~~~~~~~~~
employment.cpp:38:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |   scanf("%d", A + i);
      |   ~~~~~^~~~~~~~~~~~~
employment.cpp:42:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |   scanf("%d", ty + i);
      |   ~~~~~^~~~~~~~~~~~~~
employment.cpp:44:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |    scanf("%d", pos + i);
      |    ~~~~~^~~~~~~~~~~~~~~
employment.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |   scanf("%d", B + i);
      |   ~~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 30 / 30
• Subtask 3: 60 / 60