Submission #1179577

#	Time	Username	Problem	Language	Result	Execution time	Memory
1179577		Nonoze	Fish 3 (JOI24_fish3)	C++20	7 / 100	381 ms	11508 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define sz(x) (int)x.size()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define fi first
#define se second
#define cmin(a, b) a=min(a, b)
#define cmax(a, b) a=max(a, b)

void solve();

signed main() {
	ios::sync_with_stdio(0); cin.tie(0);
	solve();
	return 0;
}


int n, k, q;
vector<int> a;

void solve() {
	cin >> n >> k;
	a.resize(n); for (auto &u: a) cin >> u;
	vector<int> pref=a; for (int i=1; i<n; i++) pref[i]+=pref[i-1];
	set<pair<int, int>> st;
	int act=0;
	for (int i=0; i<n; i++) {
		if (a[i]) act++;
		else {
			if (act) st.insert({i-act, i-1});
			act=0;
		}
	}
	cin >> q;
	while (q--) {
		int l, r; cin >> l >> r; l--, r--;
		auto lb=st.lower_bound({r+1, r});
		if (lb==st.begin()) {
			cout << 0 << endl;
			continue;
		}
		lb--;
		if (lb->second>=r) {
			if (lb==st.begin()) {
				cout << 0 << endl;
				continue;
			}
			lb--;
		}
		int nb=max(0LL, pref[lb->second]-(l?pref[l-1]:0LL));
		if (!nb || k==1) cout << nb << endl;
		else cout << -1 << endl;
	}
}

• Subtask 1: 0 / 9
• Subtask 2: 7 / 7
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36