Submission #784566

#	Time	Username	Problem	Language	Result	Execution time	Memory
784566		Acanikolic	Sterilizing Spray (JOI15_sterilizing)	C++17	10 / 100	36 ms	4812 KiB

sterilizing

#include <bits/stdc++.h>
 
#define ll long long 

#define int long long 
 
#define pb push_back 

#define F first
 
#define S second
 
using namespace std;
 
const long long N = 1e5+10;
 
const long long mod = 1e9+7;
 
const long long inf = 1e18;

vector<int>ft(N);

void update(int index,int n,int val) {
	while(index <= n) {
		ft[index] += val;
		index += index & -index; 
	}
}

int get(int x) {
	int X = 0;
	while(x >= 1) {
		X += ft[x];
		x -= x & -x;
	}
	return X;
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    
	int n,Q,k;
	cin >> n >> Q >> k;
	vector<int>a(n+1);
	for(int i=1;i<=n;i++) {
		cin >> a[i];
		update(i,n,a[i]);
	}
	if(k == 1) {
		while(Q--) {
			int type;
			cin >> type;
			if(type == 1) {
				int index,val;
				cin >> index >> val;
				update(index,n,val-a[index]);
				a[index] = val;
			}
			else if(type == 2) {
				int l,r;
				cin >> l >> r;
			}
			else {
				int l,r;
				cin >> l >> r;
				cout << get(r)-get(l-1) << '\n';
			}
		}
		return 0;
	}
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75