Submission #677369

#	Time	Username	Problem	Language	Result	Execution time	Memory
677369		penguin133	Solar Storm (NOI20_solarstorm)	C++17	36 / 100	258 ms	78784 KiB

SolarStorm

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif

int n, s, k, A[1000005], B[1000005], P[1000005], X[1000005], dp[1000005];
pi pre[1000005];
pi p[1000005];

void solve(){
	cin >> n >> s >> k;
	for(int i=2;i<=n;i++)cin >> A[i], P[i] = P[i-1] + A[i];
	for(int i=1;i<=n;i++)cin >> B[i], X[i] = X[i-1] + B[i];
	for(int i=1;i<=n;i++){
		int lo = 1, hi = i, ans = hi;
		while(lo <= hi){
			int mid = (lo + hi) >> 1;
			if(P[i] - P[mid] <= k)ans = mid, hi = mid - 1;
			else lo = mid + 1;
		}
		lo = 1, hi = ans;
		int ans2 = ans;
		while(lo <= hi){
			int mid = (lo + hi) >> 1;
			if(P[ans] - P[mid] <= k)ans2 = mid, hi = mid - 1;
			else lo = mid + 1;
		}
		pre[i] = {ans2 - 1, ans};
	}
	int bt = 1, rem = s - 1;
	while(rem && bt <= n){
		rem--;
		int lo = bt, hi = n, ans = lo;
		while(lo <= hi){
			int mid = (lo + hi) >> 1;
			if(P[mid] - P[bt] <= k)ans = mid, lo = mid + 1;
			else hi = mid - 1;
		}
		lo = ans, hi = n;
		int ans2 = ans;
		while(lo <= hi){
			int mid = (lo + hi) >> 1;
			if(P[mid] - P[ans] <= k)ans2 = mid, lo = mid + 1;
			else hi = mid - 1;
		}
		bt = ans2 + 1;
	}
	//cerr << bt << " ";
	vector<int> fin;
	int mx = 0, in = 0;
	for(int i=1;i<bt;i++){
		dp[i] = X[i];
		p[i] = {1, 0};
		if(dp[i] > mx)mx = dp[i], in = i;
	}
	p[0] = {1, 0};
	for(int i=bt;i<=n;i++){
		pi tmp = pre[i];
		//cout << pre[i].fi << " " << p[tmp.fi].fi << " " << p[tmp.fi].se << '\n';
		if(mx < dp[tmp.fi] - (X[p[tmp.fi].se] - X[p[tmp.fi].fi - 1]) + X[i] - X[tmp.fi])mx = dp[tmp.fi] - (X[p[tmp.fi].se] - X[p[tmp.fi].fi - 1]) + X[i] - X[tmp.fi], in = i;
		dp[i] = dp[tmp.fi] - (X[p[tmp.fi].se] - X[p[tmp.fi].fi - 1]) + X[i] - X[tmp.fi];
		int lo = p[tmp.fi].se + 1, hi = i, ans = lo;
		while(lo <= hi){
			int mid = (lo + hi) >> 1;
			if(P[mid] - P[p[tmp.fi].se + 1] <= k)ans = mid, lo = mid + 1;
			else hi = mid - 1;
		}
		lo = ans, hi = i;
		int ans2 = ans;
		while(lo <= hi){
			int mid = (lo + hi) >> 1;
			if(P[mid] - P[ans] <= k)ans2 = mid, lo = mid + 1;
			else hi = mid - 1;
		}
		//cout << dp[i] << " " << p[i].fi << " " << p[i].se << '\n';
		p[i] = {p[tmp.fi].se + 1, ans2};
	}
	bt = in, rem = s;
	vector<int> v;
	while(rem && bt){
		rem--;
		v.push_back(pre[bt].se);
		bt = pre[bt].fi;
	}
	//cout << mx << '\n';
	cout << (int)v.size() << '\n';
	for(auto i : v)cout << i << " ";
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message (stderr)

SolarStorm.cpp:97:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   97 | main(){
      | ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 7 / 7
• Subtask 3: 11 / 11
• Subtask 4: 8 / 8
• Subtask 5: 0 / 18
• Subtask 6: 0 / 16
• Subtask 7: 0 / 30