Submission #902520

#	Time	Username	Problem	Language	Result	Execution time	Memory
902520		qin	Financial Report (JOI21_financial)	C++17	48 / 100	4082 ms	9796 KiB

Main

#include <bits/stdc++.h>
#define fi first
#define se second
#define ssize(x) int(x.size())
#define pn printf("\n")
#define all(x) x.begin(),x.end()
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
int inf = 2e09; ll infll = 2e18;
int base = 1;
struct seg{
		vector<pii> t;
		void init(int n){
				while(base < n) base <<= 1;
				t.resize(base<<1);
		}
		void update(int i, int val, int time){
				t[i] = pii(val, time);
		}
		void zero(int l, int r, int time){
				for(int i = l; i <= r; ++i) if(t[i].se < time) t[i] = pii(0, inf);
		}
		int query(int l, int r){
				int ret = 0;
				for(int i = l; i <= r; ++i) ret = max(t[i].fi, ret);
				return ret;
		}
		void change_time(int l, int r, int time){
				for(int i = l; i <= r; ++i) if(t[i].se < time) t[i].se = time;
		}
};
void answer(){
		int n, d; scanf("%d%d", &n, &d);
		set<int> sc;
		vector<int> t(n+1);
		for(int i = 1; i <= n; ++i) scanf("%d", &t[i]), sc.emplace(t[i]);
		unordered_map<int, int> mp; int it = 0;
		for(int u : sc) mp[u] = ++it;
		for(int i = 1; i <= n; ++i) t[i] = mp[t[i]];
		
		seg seg; seg.init(n);
		int result = 0;
		for(int i = 1; i <= n; ++i){
				int mn = inf, mn_time = 0;
				for(int j = i-1; j >= max(1, i-d); --j) if(t[j] <= mn) mn = t[j], mn_time = j;
				if(mn != inf) seg.zero(1, mn-1, i-d), seg.change_time(mn, base, mn_time);
				if(i != n) seg.update(t[i], max(seg.query(1, t[i]-1)+1, seg.query(t[i], t[i])), i);
				else result = max(seg.query(1, t[i]-1)+1, seg.query(t[i], base));
				//~ for(int j = 1; j <= n; ++j) printf("%d %d, ", seg.t[j].fi, seg.t[j].se);
				//~ pn;
		}
		printf("%d\n", result);
}
int main(){
		int T = 1;
		for(++T; --T; ) answer();
		return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void answer()':
Main.cpp:34:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |   int n, d; scanf("%d%d", &n, &d);
      |             ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:37:36: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |   for(int i = 1; i <= n; ++i) scanf("%d", &t[i]), sc.emplace(t[i]);
      |                               ~~~~~^~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 20 / 20
• Subtask 4: 0 / 12
• Subtask 5: 0 / 5
• Subtask 6: 0 / 35