oj.uz

Submission #652455

# Submission time Handle Problem Language Result Execution time Memory
652455 2022-10-22T17:04:09 Z blue Catfish Farm (IOI22_fish) C++17
18 / 100
 300 ms 65596 KB 
#include "fish.h"
#include <bits/stdc++.h>
using namespace std;
 
using ll = long long;
using vll = vector<ll>;
using vvll = vector<vll>;
using pii = pair<int, int>;
using vpii = vector<pii>;
using vvpii = vector<vpii>;
using vi = vector<int>;
using vvi = vector<vi>;
using pll = pair<ll, ll>;
using vpll = vector<pll>;
#define sz(x) int(x.size())
 
void selfmax(ll& a, ll b)
{
	a = max(a, b);
}
 
const int maxN = 100'000;
 
vpll fish[1 + maxN];
vll fishpref[1 + maxN];
vll tot(1 + maxN, 0);
 
ll max_weights(int N, int M, vi X, vi Y, vi W)
{
	vvll sm(2, vll(N, 0));
	for(int j = 0; j < M; j++)
		if(X[j] < 2)
			sm[X[j]][Y[j]] += W[j];
 
	if(N == 2)
	{
		return max(sm[0][0] + sm[0][1], sm[1][0] + sm[1][1]);
	}

 
	int xmx = 0;
	for(int j = 0; j < M; j++)
	{
		X[j]++;
		xmx = max(xmx, X[j] + 2);
		Y[j]++;
	}
	xmx = min(xmx, N);
 
	// cerr << "xmx = " << xmx << '\n';
 
	vpll fish[1+N];
	ll* fishpref[1+N];
 
	vpii fishbyY[1+N];
 
	for(int j = 0; j < M; j++)
	{
		// fish[X[j]].push_back({Y[j], W[j]});
		fishbyY[Y[j]].push_back({X[j], W[j]});
		tot[X[j]] += W[j];
	}
 
	for(int y = 0; y <= N; y++)
		for(pii z : fishbyY[y])
			fish[z.first].push_back({y, z.second});
 
	for(int r = 1; r <= xmx; r++)
	{
		fish[r].push_back({N+1, 0});
		// sort(fish[r].begin(), fish[r].end());
 
		if(fish[r][0].first != 1)
		{
			fish[r].insert(fish[r].begin(), {1, 0});
		}
 
		fishpref[r] = new ll[sz(fish[r])];
		for(int i = 0; i < sz(fish[r]); i++)
		{
			fishpref[r][i] = (i == 0 ? 0 : fishpref[r][i-1]) + fish[r][i].second;
		}
	}
 
	fish[0] = vpll{{0, 0}};
	fishpref[0] = new ll[1];
	fishpref[0][0] = 0;
 
	// vvll inc(1+N), dec(1+N);
	ll* inc[1+N];
	ll* dec[1+N];
	ll* incpref[1+N];
	ll* decpref[1+N]; //pref inc dec mx
	inc[0] = new ll[1];
	inc[0][0] = 0;

	dec[0] = new ll[1];
	dec[0][0] = 0;
 
 	ll res = 0;
	// cerr << "done\n";
 
	for(int r = 1; r <= xmx; r++)
	{
		incpref[r-1] = new ll[sz(fish[r-1])];
		decpref[r-1] = new ll[sz(fish[r-1])];

		incpref[r-1][0] = decpref[r-1][0] = 0;

		for(int i = 1; i < sz(fish[r-1]); i++)
		{
			incpref[r-1][i] = max(incpref[r-1][i-1], inc[r-1][i]);
			decpref[r-1][i] = max(decpref[r-1][i-1], dec[r-1][i]);
		}
 
 
		// inc[r] = dec[r] = vll(sz(fish[r]), 0);
		inc[r] = new ll[sz(fish[r])];
		dec[r] = new ll[sz(fish[r])];
		for(int i = 0; i < sz(fish[r]); i++)
			inc[r][i] = dec[r][i] = 0;
 
 
 
 
 
 
		vll Csuff;
		if(r >= 2)
		{
			Csuff = vll(sz(fish[r-2]));
 
			int pi = sz(fish[r-1])-1;
			ll pwt = tot[r-1];
 
			for(int j = sz(fish[r-2])-1; j >= 0; j--)
			{
				while(pi >= 0 && fish[r-1][pi].first > fish[r-2][j].first - 1)
				{
					pwt -= fish[r-1][pi].second;
					pi--;
				}
 
				// Csuff[j] = max(inc[r-2][j], dec[r-2][j]) + htwt(r-1, fish[r-2][j].first - 1);
				Csuff[j] = max(inc[r-2][j], dec[r-2][j]) + pwt;
				if(j+1 < sz(fish[r-2]))
					selfmax(Csuff[j], Csuff[j+1]);
			}
		}
 
 
		ll Dmx = 0;
		ll Did = -1;
 
		int ppi = -1;
 		int qi = -1;
 		ll qwt = 0;
 
		for(int i = 0; i < sz(fish[r]); i++)
		{
			ll basic = 0;
 
			ll Bcatch = 0;
			int Bk = -1;
 
			while(qi+1 < sz(fish[r-1]) && fish[r-1][qi+1].first <= fish[r][i].first - 1)
			{
				qi++;
				Bcatch += fish[r-1][qi].second;
			}
			qwt += Bcatch;
			ll prevpwt = qwt;
 
			ll constD = -(tot[r-1] - prevpwt) + tot[r-1];
 
			if(r >= 2)
			{
				//A
				selfmax(basic, max(inc[r-2][0], dec[r-2][0]) + prevpwt);
 
 
 
 
 				while(ppi+1 < sz(fish[r-2]) && fish[r-2][ppi+1].first <= fish[r][i].first)
 					ppi++;
				int ploci = ppi;
 

				selfmax(basic, Bcatch + max(incpref[r-2][ploci], decpref[r-2][ploci]));
	
				if(ploci+1 < sz(fish[r-2]))
				{
					// cerr << ploci << " : " << sz(fish[r-2]) << '\n';
					selfmax(basic, Csuff[ploci+1]);
				}
			}
 
			selfmax(inc[r][i], basic);
			selfmax(dec[r][i], basic);
 
			//type D transition
 
			while(Did+1 < sz(fish[r-1]) && fish[r-1][Did+1].first <= fish[r][i].first)
			{
				Did++;
				Dmx = max(Dmx, inc[r-1][Did] - (Did >= 1 ? fishpref[r-1][Did-1] : 0));
			}
 
			selfmax(inc[r][i], Dmx + constD);
			selfmax(dec[r][i], Dmx + constD);
 
		}
 
		int j = sz(fish[r-1]);
		ll bestval = -1'000'000'000'000'000'000LL;
 
		int ri = sz(fish[r]);
		ll rwt = 0;
 
 
		for(int i = sz(fish[r])-1; i >= 0; i--)
		{
 			while(j-1 >= 0 && fish[r-1][j-1].first > fish[r][i].first)
 			{
 				j--;
 				while(ri-1 >= 0 && fish[r][ri-1].first >= fish[r-1][j].first)
 				{
 					ri--;
 					rwt += fish[r][ri].second;
 				}
 				bestval = max(bestval, dec[r-1][j] + tot[r] - rwt);
 			}
 
 			selfmax(dec[r][i], bestval - (i >= 1 ? fishpref[r][i-1] : 0));
		}

		for(int i = 0; i < sz(fish[r]); i++)
			selfmax(res, max(inc[r][i], dec[r][i]));
	}
 
	return res;
}

Compilation message

fish.cpp: In function 'll max_weights(int, int, vi, vi, vi)':
fish.cpp:164:8: warning: unused variable 'Bk' [-Wunused-variable]
  164 |    int Bk = -1;
      |        ^~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 24324 KB Output is correct
2 Correct 93 ms 27692 KB Output is correct
3 Correct 11 ms 15916 KB Output is correct
4 Correct 8 ms 15940 KB Output is correct
5 Correct 199 ms 64176 KB Output is correct
6 Correct 300 ms 65596 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 101 ms 31000 KB Output is correct
3 Correct 122 ms 35464 KB Output is correct
4 Correct 48 ms 24332 KB Output is correct
5 Correct 62 ms 27640 KB Output is correct
6 Correct 3 ms 5716 KB Output is correct
7 Correct 3 ms 5716 KB Output is correct
8 Correct 3 ms 5716 KB Output is correct
9 Correct 5 ms 5716 KB Output is correct
10 Correct 9 ms 15940 KB Output is correct
11 Correct 10 ms 15944 KB Output is correct
12 Correct 53 ms 24396 KB Output is correct
13 Correct 78 ms 27608 KB Output is correct
14 Correct 64 ms 24076 KB Output is correct
15 Correct 75 ms 24932 KB Output is correct
16 Correct 58 ms 24152 KB Output is correct
17 Correct 73 ms 26172 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 15940 KB Output is correct
2 Correct 54 ms 36212 KB Output is correct
3 Correct 70 ms 34640 KB Output is correct
4 Correct 60 ms 35352 KB Output is correct
5 Correct 106 ms 39356 KB Output is correct
6 Correct 104 ms 39424 KB Output is correct
7 Correct 101 ms 39360 KB Output is correct
8 Correct 121 ms 39448 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 4 ms 5716 KB Output is correct
3 Correct 4 ms 5716 KB Output is correct
4 Correct 4 ms 5716 KB Output is correct
5 Correct 3 ms 5716 KB Output is correct
6 Correct 4 ms 5716 KB Output is correct
7 Correct 4 ms 5716 KB Output is correct
8 Correct 4 ms 5716 KB Output is correct
9 Incorrect 4 ms 5844 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '215490708338'
10 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 4 ms 5716 KB Output is correct
3 Correct 4 ms 5716 KB Output is correct
4 Correct 4 ms 5716 KB Output is correct
5 Correct 3 ms 5716 KB Output is correct
6 Correct 4 ms 5716 KB Output is correct
7 Correct 4 ms 5716 KB Output is correct
8 Correct 4 ms 5716 KB Output is correct
9 Incorrect 4 ms 5844 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '215490708338'
10 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5716 KB Output is correct
2 Correct 4 ms 5716 KB Output is correct
3 Correct 4 ms 5716 KB Output is correct
4 Correct 4 ms 5716 KB Output is correct
5 Correct 3 ms 5716 KB Output is correct
6 Correct 4 ms 5716 KB Output is correct
7 Correct 4 ms 5716 KB Output is correct
8 Correct 4 ms 5716 KB Output is correct
9 Incorrect 4 ms 5844 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '215490708338'
10 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 15940 KB Output is correct
2 Correct 54 ms 36212 KB Output is correct
3 Correct 70 ms 34640 KB Output is correct
4 Correct 60 ms 35352 KB Output is correct
5 Correct 106 ms 39356 KB Output is correct
6 Correct 104 ms 39424 KB Output is correct
7 Correct 101 ms 39360 KB Output is correct
8 Correct 121 ms 39448 KB Output is correct
9 Correct 126 ms 44864 KB Output is correct
10 Incorrect 78 ms 26296 KB 1st lines differ - on the 1st token, expected: '36454348383152', found: '36046019441589'
11 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 24324 KB Output is correct
2 Correct 93 ms 27692 KB Output is correct
3 Correct 11 ms 15916 KB Output is correct
4 Correct 8 ms 15940 KB Output is correct
5 Correct 199 ms 64176 KB Output is correct
6 Correct 300 ms 65596 KB Output is correct
7 Correct 3 ms 5716 KB Output is correct
8 Correct 101 ms 31000 KB Output is correct
9 Correct 122 ms 35464 KB Output is correct
10 Correct 48 ms 24332 KB Output is correct
11 Correct 62 ms 27640 KB Output is correct
12 Correct 3 ms 5716 KB Output is correct
13 Correct 3 ms 5716 KB Output is correct
14 Correct 3 ms 5716 KB Output is correct
15 Correct 5 ms 5716 KB Output is correct
16 Correct 9 ms 15940 KB Output is correct
17 Correct 10 ms 15944 KB Output is correct
18 Correct 53 ms 24396 KB Output is correct
19 Correct 78 ms 27608 KB Output is correct
20 Correct 64 ms 24076 KB Output is correct
21 Correct 75 ms 24932 KB Output is correct
22 Correct 58 ms 24152 KB Output is correct
23 Correct 73 ms 26172 KB Output is correct
24 Correct 9 ms 15940 KB Output is correct
25 Correct 54 ms 36212 KB Output is correct
26 Correct 70 ms 34640 KB Output is correct
27 Correct 60 ms 35352 KB Output is correct
28 Correct 106 ms 39356 KB Output is correct
29 Correct 104 ms 39424 KB Output is correct
30 Correct 101 ms 39360 KB Output is correct
31 Correct 121 ms 39448 KB Output is correct
32 Correct 3 ms 5716 KB Output is correct
33 Correct 4 ms 5716 KB Output is correct
34 Correct 4 ms 5716 KB Output is correct
35 Correct 4 ms 5716 KB Output is correct
36 Correct 3 ms 5716 KB Output is correct
37 Correct 4 ms 5716 KB Output is correct
38 Correct 4 ms 5716 KB Output is correct
39 Correct 4 ms 5716 KB Output is correct
40 Incorrect 4 ms 5844 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '215490708338'
41 Halted 0 ms 0 KB -