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Submission #745389

# Submission time Handle Problem Language Result Execution time Memory
745389 2023-05-20T00:21:29 Z CSQ31 Catfish Farm (IOI22_fish) C++17
18 / 100
 303 ms 81016 KB 
#include "fish.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) (int)(a.size())
#define all(a) a.begin(),a.end()
#define lb lower_bound
#define ub upper_bound
#define owo ios_base::sync_with_stdio(0);cin.tie(0);
#define debug(...) fprintf(stderr, __VA_ARGS__),fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false);\
debug("%s time : %.4fs\n", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))
typedef long long int ll;
typedef long double ld;
typedef pair<ll,ll> PII;
typedef pair<int,int> pii;
typedef vector<vector<int>> vii;
typedef vector<vector<ll>> VII;
ll gcd(ll a,ll b){if(!b)return a;else return gcd(b,a%b);}
const ll INF = 1e18;
const int MAXN = 2e5+5;
vector<pii>fish[MAXN];
vector<ll>dp[2][MAXN],crd[MAXN],pref[MAXN];
void chmax(ll &x,ll y){
	x = max(x,y);
}
long long max_weights(int n, int m, vector<int> X, vector<int> Y,vector<int> W) {
	ll ans = 0;
	for(int i=0;i<m;i++)fish[X[i]].pb({Y[i],W[i]});
	for(int i=0;i<n;i++)sort(all(fish[i]));
	for(int i=0;i<n;i++){
		for(pii z:fish[i])crd[i].pb(z.fi);
		if(i)for(pii z:fish[i-1])crd[i].pb(z.fi);
		if(i+1<n)for(pii z:fish[i+1])crd[i].pb(z.fi);
		
		crd[i].pb(-1);
		sort(all(crd[i]));
		crd[i].resize(unique(all(crd[i])) - crd[i].begin());
		int s = sz(crd[i]);
		
		dp[0][i].assign(s,-INF);
		dp[1][i].assign(s,-INF);
		
		pref[i].assign(s,0);
		for(pii z:fish[i]){
			int p = lb(all(crd[i]),z.fi) - crd[i].begin();
			pref[i][p] = z.se;
		}
		for(int j=1;j<s;j++)pref[i][j]+=pref[i][j-1];
	}
	
	//initialize column one 
	for(ll &x:dp[0][0])x = 0;
	
	for(int i=1;i<n;i++){
		//last pier is lower
		ll mx = -INF;
		int ptr = -1;
		for(int j=0;j<sz(crd[i]);j++){
			while(ptr + 1 < sz(crd[i-1]) && crd[i-1][ptr+1] <= crd[i][j]){
				ptr++;
				mx = max(mx,dp[0][i-1][ptr] - pref[i-1][ptr]);
			}
			chmax(dp[0][i][j],mx + pref[i-1][ptr]);
		}
		//;ast pier is higher
		mx = -INF;
		ptr = sz(crd[i-1]);
		ll sum = pref[i].back();
		vector<pii>f = fish[i];
		for(int j=sz(crd[i])-1;j>=0;j--){
			while(ptr - 1 >= 0 && crd[i-1][ptr-1] >= crd[i][j]){
				ptr--;
				while(!f.empty() && f.back().fi > crd[i-1][ptr]){
					sum-=f.back().fi;
					f.pop_back();
				}
				mx = max(mx,dp[1][i-1][ptr] + sum);
			}
			chmax(dp[1][i][j],mx - pref[i][j]);
		}
		if(i==1)continue;
		//i-1 column is empty :
		//i-2 pier is shorter
		sum = 0;
		mx = -INF;
		int ptr0 = -1; //column i-2
		int ptr1 = -1; //column i-1
		for(int j=0;j<sz(crd[i]);j++){
			while(ptr0 + 1 < sz(crd[i-2]) && crd[i-2][ptr0+1] <= crd[i][j]){
				ptr0++;
				mx = max(mx,dp[0][i-2][ptr0]);
				mx = max(mx,dp[1][i-2][ptr0]);
			}
			while(ptr1 + 1 < sz(fish[i-1]) && fish[i-1][ptr1+1].fi <= crd[i][j]){
				ptr1++;
				sum+=fish[i-1][ptr1].se;
			}
			chmax(dp[0][i][j],mx + sum);
		}
		//i-2 pier is higher
		sum = pref[i-1].back();
		mx = -INF;
		ptr0 = sz(crd[i-2]);
		ptr1 = sz(fish[i-1]) - 1;
		for(int j=sz(crd[i])-1;j>=0;j--){
			while(ptr0 - 1 >= 0 && crd[i-2][ptr0-1] >= crd[i][j]){
				ptr0--;
				while(ptr1 >= 0 && fish[i-1][ptr1].fi > crd[i-2][ptr0]){
					sum-=fish[i-1][ptr1].se;
					ptr1--;
				}
				mx = max(mx,dp[0][i-2][ptr0] + sum);
				mx = max(mx,dp[1][i-2][ptr0] + sum);
			}
			chmax(dp[0][i][j],mx);
		}
		/*
		cout<<"at "<<i<<'\n';
		for(int x:crd[i])cout<<x<<" ";cout<<'\n';
		for(ll x:dp[0][i])cout<<x<<" ";cout<<'\n';
		for(ll x:dp[1][i])cout<<x<<" ";cout<<'\n';
		*/
		
	}
	for(ll x:dp[0][n-1])ans = max(ans,x);
	for(ll x:dp[1][n-1])ans = max(ans,x);
	if(n>=2){
		int ptr = -1;
		ll sum = 0;
		for(int i=0;i<sz(crd[n-2]);i++){
			while(ptr + 1 < sz(fish[n-1]) && fish[n-1][ptr+1].fi <= crd[n-2][i]){
				ptr++;
				sum+=fish[n-1][ptr].se;
			}
			chmax(ans,dp[0][n-2][i]+sum);
			chmax(ans,dp[1][n-2][i]+sum);
		}
	}
	return ans;
}

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 44040 KB Output is correct
2 Correct 97 ms 47452 KB Output is correct
3 Correct 33 ms 36196 KB Output is correct
4 Correct 38 ms 36228 KB Output is correct
5 Correct 261 ms 81016 KB Output is correct
6 Correct 303 ms 80792 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 23764 KB Output is correct
2 Correct 148 ms 52832 KB Output is correct
3 Correct 172 ms 57828 KB Output is correct
4 Correct 85 ms 44036 KB Output is correct
5 Correct 101 ms 47496 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 11 ms 23764 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 33 ms 36264 KB Output is correct
11 Correct 33 ms 36304 KB Output is correct
12 Correct 90 ms 47240 KB Output is correct
13 Correct 103 ms 51388 KB Output is correct
14 Correct 86 ms 45648 KB Output is correct
15 Correct 97 ms 46140 KB Output is correct
16 Correct 88 ms 45756 KB Output is correct
17 Correct 96 ms 48036 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 36172 KB Output is correct
2 Correct 33 ms 36308 KB Output is correct
3 Correct 61 ms 39768 KB Output is correct
4 Correct 54 ms 39308 KB Output is correct
5 Correct 88 ms 44876 KB Output is correct
6 Correct 107 ms 44268 KB Output is correct
7 Correct 92 ms 44796 KB Output is correct
8 Correct 99 ms 44920 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23752 KB Output is correct
2 Correct 12 ms 23760 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23672 KB Output is correct
5 Correct 13 ms 23788 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 12 ms 23792 KB Output is correct
8 Incorrect 13 ms 23784 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
9 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23752 KB Output is correct
2 Correct 12 ms 23760 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23672 KB Output is correct
5 Correct 13 ms 23788 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 12 ms 23792 KB Output is correct
8 Incorrect 13 ms 23784 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
9 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23752 KB Output is correct
2 Correct 12 ms 23760 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 12 ms 23672 KB Output is correct
5 Correct 13 ms 23788 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 12 ms 23792 KB Output is correct
8 Incorrect 13 ms 23784 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
9 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 36172 KB Output is correct
2 Correct 33 ms 36308 KB Output is correct
3 Correct 61 ms 39768 KB Output is correct
4 Correct 54 ms 39308 KB Output is correct
5 Correct 88 ms 44876 KB Output is correct
6 Correct 107 ms 44268 KB Output is correct
7 Correct 92 ms 44796 KB Output is correct
8 Correct 99 ms 44920 KB Output is correct
9 Correct 98 ms 49400 KB Output is correct
10 Incorrect 87 ms 37944 KB 1st lines differ - on the 1st token, expected: '36454348383152', found: '36364983059693'
11 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 44040 KB Output is correct
2 Correct 97 ms 47452 KB Output is correct
3 Correct 33 ms 36196 KB Output is correct
4 Correct 38 ms 36228 KB Output is correct
5 Correct 261 ms 81016 KB Output is correct
6 Correct 303 ms 80792 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 148 ms 52832 KB Output is correct
9 Correct 172 ms 57828 KB Output is correct
10 Correct 85 ms 44036 KB Output is correct
11 Correct 101 ms 47496 KB Output is correct
12 Correct 12 ms 23764 KB Output is correct
13 Correct 12 ms 23764 KB Output is correct
14 Correct 11 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 33 ms 36264 KB Output is correct
17 Correct 33 ms 36304 KB Output is correct
18 Correct 90 ms 47240 KB Output is correct
19 Correct 103 ms 51388 KB Output is correct
20 Correct 86 ms 45648 KB Output is correct
21 Correct 97 ms 46140 KB Output is correct
22 Correct 88 ms 45756 KB Output is correct
23 Correct 96 ms 48036 KB Output is correct
24 Correct 35 ms 36172 KB Output is correct
25 Correct 33 ms 36308 KB Output is correct
26 Correct 61 ms 39768 KB Output is correct
27 Correct 54 ms 39308 KB Output is correct
28 Correct 88 ms 44876 KB Output is correct
29 Correct 107 ms 44268 KB Output is correct
30 Correct 92 ms 44796 KB Output is correct
31 Correct 99 ms 44920 KB Output is correct
32 Correct 12 ms 23752 KB Output is correct
33 Correct 12 ms 23760 KB Output is correct
34 Correct 12 ms 23764 KB Output is correct
35 Correct 12 ms 23672 KB Output is correct
36 Correct 13 ms 23788 KB Output is correct
37 Correct 13 ms 23764 KB Output is correct
38 Correct 12 ms 23792 KB Output is correct
39 Incorrect 13 ms 23784 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
40 Halted 0 ms 0 KB -