Submission #172708

#	Time	Username	Problem	Language	Result	Execution time	Memory
172708		khohko	Employment (JOI16_employment)	C++17	100 / 100	204 ms	13888 KiB

employment

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ARRS ((ll)(4e5+100))
#define fr first
#define sc second
#define pb push_back
#define MX ((ll)(1e9+100))
#define MAX ((ll)(1e18+100))


int n,q;
int a[ARRS];
int up[ARRS];
int type[ARRS];
pair<int, int> compress[ARRS];

int fw[2*ARRS];
int quer(int idx){
	int pas=0;
	for(;idx;idx-=idx&-idx)
		pas+=fw[idx];
	return pas;
}

void updt(int idx, int val){
	for(;idx<ARRS;idx+=idx&-idx)
		fw[idx]+=val;
}

void update_quer(int i, int k){
	if(i&&a[i-1]>a[i]){
		updt(a[i]+1, k);
		updt(a[i-1]+1, -k);
	}
}

int main(){
	scanf("%d %d", &n, &q);
	for(int i=0; i<n; i++){
		scanf("%d", &a[i]);
		compress[i]={a[i],i};
	}
	a[n]=0;
	compress[n]={a[n],n};
	n++;
	for(int i=n; i<n+q; i++){
		scanf("%d", &type[i]);
		if(type[i] == 1){//query
			scanf("%d", &a[i]);
		}
		else {//update
			scanf("%d %d", &up[i], &a[i]);
			up[i]--;
		}
		compress[i]={a[i],i};
	}
	sort(compress, compress+n+q);
	ll c=1;
	for(int i=0; i<n+q; i++){
		if(i&&compress[i].fr!=compress[i-1].fr)
			c++;
		a[compress[i].sc]=c;
	}
	for(int i=0; i<n; i++)
		update_quer(i, 1);
	for(int i=n; i<n+q; i++){
		if(type[i] == 1){
			printf("%d\n", quer(a[i]));
		}
		else {
			update_quer(up[i], -1);
			update_quer(up[i]+1, -1);
			a[up[i]]=a[i];
			update_quer(up[i], 1);
			update_quer(up[i]+1, 1);
		}
	}

}

Compilation message (stderr)

employment.cpp: In function 'int main()':
employment.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &q);
  ~~~~~^~~~~~~~~~~~~~~~~
employment.cpp:41:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~
employment.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &type[i]);
   ~~~~~^~~~~~~~~~~~~~~~
employment.cpp:50:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &a[i]);
    ~~~~~^~~~~~~~~~~~~
employment.cpp:53:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d", &up[i], &a[i]);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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