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Submission #745390

# Submission time Handle Problem Language Result Execution time Memory
745390 2023-05-20T00:43:03 Z CSQ31 Catfish Farm (IOI22_fish) C++17
18 / 100
 278 ms 74660 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;
	dp[1][0][sz(crd[0])-1] = 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().se;
					f.pop_back();
				}
				mx = max(mx,dp[1][i-1][ptr] + sum);
			}
			chmax(dp[1][i][j],mx - pref[i][j]);
		}
		if(i>=1){
			//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
			f = fish[i-1];
			sum = pref[i-1].back();
			mx = -INF;
			ptr0 = sz(crd[i-2]);
			ptr1 = sz(f) - 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 && f[ptr1].fi > crd[i-2][ptr0]){
						sum-=f[ptr1].se;
						ptr1--;
					}
					chmax(mx,dp[0][i-2][ptr0] + sum);
					chmax(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 80 ms 43160 KB Output is correct
2 Correct 92 ms 46472 KB Output is correct
3 Correct 34 ms 36352 KB Output is correct
4 Correct 35 ms 36172 KB Output is correct
5 Correct 240 ms 74660 KB Output is correct
6 Correct 278 ms 73924 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 145 ms 50668 KB Output is correct
3 Correct 165 ms 54284 KB Output is correct
4 Correct 82 ms 43200 KB Output is correct
5 Correct 95 ms 46468 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 12 ms 23780 KB Output is correct
8 Correct 11 ms 23764 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 36 ms 36296 KB Output is correct
11 Correct 34 ms 36292 KB Output is correct
12 Correct 86 ms 45864 KB Output is correct
13 Correct 100 ms 49624 KB Output is correct
14 Correct 83 ms 44580 KB Output is correct
15 Correct 94 ms 44632 KB Output is correct
16 Correct 84 ms 44572 KB Output is correct
17 Correct 91 ms 46776 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 36272 KB Output is correct
2 Correct 35 ms 36288 KB Output is correct
3 Correct 64 ms 38836 KB Output is correct
4 Correct 61 ms 38684 KB Output is correct
5 Correct 93 ms 43320 KB Output is correct
6 Correct 90 ms 43344 KB Output is correct
7 Correct 97 ms 43236 KB Output is correct
8 Correct 104 ms 43280 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 11 ms 23672 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 15 ms 23780 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 12 ms 23676 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 12 ms 23792 KB Output is correct
10 Incorrect 14 ms 24020 KB 1st lines differ - on the 1st token, expected: '799839985182', found: '799098388912'
11 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 11 ms 23672 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 15 ms 23780 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 12 ms 23676 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 12 ms 23792 KB Output is correct
10 Incorrect 14 ms 24020 KB 1st lines differ - on the 1st token, expected: '799839985182', found: '799098388912'
11 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 11 ms 23672 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 15 ms 23780 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 12 ms 23676 KB Output is correct
7 Correct 13 ms 23764 KB Output is correct
8 Correct 13 ms 23764 KB Output is correct
9 Correct 12 ms 23792 KB Output is correct
10 Incorrect 14 ms 24020 KB 1st lines differ - on the 1st token, expected: '799839985182', found: '799098388912'
11 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 36272 KB Output is correct
2 Correct 35 ms 36288 KB Output is correct
3 Correct 64 ms 38836 KB Output is correct
4 Correct 61 ms 38684 KB Output is correct
5 Correct 93 ms 43320 KB Output is correct
6 Correct 90 ms 43344 KB Output is correct
7 Correct 97 ms 43236 KB Output is correct
8 Correct 104 ms 43280 KB Output is correct
9 Correct 121 ms 48008 KB Output is correct
10 Incorrect 75 ms 36216 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 80 ms 43160 KB Output is correct
2 Correct 92 ms 46472 KB Output is correct
3 Correct 34 ms 36352 KB Output is correct
4 Correct 35 ms 36172 KB Output is correct
5 Correct 240 ms 74660 KB Output is correct
6 Correct 278 ms 73924 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 145 ms 50668 KB Output is correct
9 Correct 165 ms 54284 KB Output is correct
10 Correct 82 ms 43200 KB Output is correct
11 Correct 95 ms 46468 KB Output is correct
12 Correct 12 ms 23764 KB Output is correct
13 Correct 12 ms 23780 KB Output is correct
14 Correct 11 ms 23764 KB Output is correct
15 Correct 12 ms 23764 KB Output is correct
16 Correct 36 ms 36296 KB Output is correct
17 Correct 34 ms 36292 KB Output is correct
18 Correct 86 ms 45864 KB Output is correct
19 Correct 100 ms 49624 KB Output is correct
20 Correct 83 ms 44580 KB Output is correct
21 Correct 94 ms 44632 KB Output is correct
22 Correct 84 ms 44572 KB Output is correct
23 Correct 91 ms 46776 KB Output is correct
24 Correct 33 ms 36272 KB Output is correct
25 Correct 35 ms 36288 KB Output is correct
26 Correct 64 ms 38836 KB Output is correct
27 Correct 61 ms 38684 KB Output is correct
28 Correct 93 ms 43320 KB Output is correct
29 Correct 90 ms 43344 KB Output is correct
30 Correct 97 ms 43236 KB Output is correct
31 Correct 104 ms 43280 KB Output is correct
32 Correct 12 ms 23764 KB Output is correct
33 Correct 11 ms 23672 KB Output is correct
34 Correct 12 ms 23764 KB Output is correct
35 Correct 15 ms 23780 KB Output is correct
36 Correct 12 ms 23764 KB Output is correct
37 Correct 12 ms 23676 KB Output is correct
38 Correct 13 ms 23764 KB Output is correct
39 Correct 13 ms 23764 KB Output is correct
40 Correct 12 ms 23792 KB Output is correct
41 Incorrect 14 ms 24020 KB 1st lines differ - on the 1st token, expected: '799839985182', found: '799098388912'
42 Halted 0 ms 0 KB -