Submission #649854

#	Time	Username	Problem	Language	Result	Execution time	Memory
649854		rsjw	Growing Trees (BOI11_grow)	C++17	0 / 100	1074 ms	2720 KiB

grow

#include <bits/stdc++.h>
using namespace std;
int n;
int t[100010],a[100010];
void update(int x,int I) {
	while(x<=n) t[x]+=I,x+=x&-x;
}
int query(int x) {
	int ans=0; while(x) ans+=t[x],x-=x&-x; return ans;
}
//写个假的二分
int search_lower(int x) { //第一个大于等于x 
	int l=1,r=n,mid;
	while(l<=r) {
		mid=(l+r)/2;
		if(query(mid)<x) l=mid+1;
		else r=mid-1;
	}
	return r+1;
}
int search_upper(int x) { //第一个大于x 
	int l=1,r=n,mid;
	while(l<=r) {
		mid=(l+r)/2;
		if(query(mid)<=x) l=mid+1;
		else r=mid-1;
	}
	return r+1;
}
int main() {
	int m,i,j;
	char c;
	int x,y,t,t2;
	cin>>n>>m;
	for(i=1;i<=n;i++) cin>>a[i];
	sort(a+1,a+n+1);
	for(i=1;i<=n;i++) update(i,a[i]-a[i-1]);
	for(i=1;i<=m;i++) {
		cin>>c>>x>>y;
		if(c=='F') {
			t=search_lower(y);
			update(t,1);
			update(t+x-1,-1);
			t2=search_upper(query(t+x-1))-1;
			update(t2,1);
			update(t2+1,-1);
		} else cout<<search_upper(y)-search_lower(x)<<endl;
	}
	return 0;
}

Compilation message (stderr)

grow.cpp: In function 'int main()':
grow.cpp:31:10: warning: unused variable 'j' [-Wunused-variable]
   31 |  int m,i,j;
      |          ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
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• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10