oj.uz

Submission #701485

# Submission time Handle Problem Language Result Execution time Memory
701485 2023-02-21T10:41:22 Z boris_mihov Catfish Farm (IOI22_fish) C++17
3 / 100
 85 ms 10856 KB 
#include "fish.h"
#include <algorithm>
#include <iostream>
#include <cassert>
#include <numeric>
#include <vector>
 
typedef long long llong;
const int MAXM = 300000 + 10;
const int MAXN = 3000 + 10;
const llong INF = 1e18;
 
int n, m;
struct Fish
{
    int x, y, w;
    inline friend bool operator < (const Fish &a, const Fish &b)
    {
        return a.x < b.x || (a.x == b.x && a.y < b.y);
    }
 
} fish[MAXM];
 
llong solveOdd()
{
    llong ans = 0;
    for (int i = 1 ; i <= m ; ++i)
    {
        ans += fish[i].w;
    }
 
    return ans;
}
 
llong solveX12()
{
    llong sum[2];
    sum[0] = sum[1] = 0;
    for (int i = 1 ; i <= m ; ++i)
    {
        --fish[i].x;
        sum[fish[i].x] += fish[i].w; 
    }
 
    if (n == 2)
    {
      	exit(-1);
        return std::max(sum[0], sum[1]);
    }
    std::sort(fish+1, fish+1+m);
    int ptr0 = 1;
    int ptr1 = 1;
    
    while (ptr1 <= m && fish[ptr1].x == 0) ptr1++;
    if (ptr1 == m+1) return sum[0];
    
    sum[0] = 0;
    llong ans = sum[1];
    
    while (ptr0 <= m && fish[ptr0].x == 0)
    {
        sum[0] += fish[ptr0].w;
        while (ptr1 <= m && fish[ptr1].y <= fish[ptr0].y)
        {
            sum[1] -= fish[ptr1].w;
            ++ptr1;
        }
 
        ans = std::max(ans, sum[0] + sum[1]);
        ptr0++;
    }
 
    return ans;
}
 
llong dp2[MAXM][2][2];
llong solveY1()
{
    llong ans = 0;
    std::sort(fish+1, fish+1+m);
    fish[0].x = -1;
    dp2[0][1][0] = -INF;
    for (int i = 1 ; i <= m ; ++i)
    {
        dp2[i][0][0] = std::max(dp2[i-1][0][0], dp2[i-1][1][0] + fish[i].w);
        dp2[i][1][0] = std::max(dp2[i-1][0][1], dp2[i-1][1][1]);
        dp2[i][0][1] = std::max(dp2[i-1][0][0], dp2[i-1][1][0]) + fish[i].w;
        dp2[i][1][1] = std::max(dp2[i-1][0][1], dp2[i-1][1][1]);
        if (fish[i].x != fish[i-1].x + 1 && fish[i].x >= 2)
        {
            dp2[i][0][0] = std::max(dp2[i][0][0], dp2[i-1][0][0] + fish[i].w);
        }
    }
 
    return std::max(dp2[m][0][0], dp2[m][1][0]);
}
 
llong solveNSmall()
{
    llong ans = 0;
    return ans;
}
 
llong max_weights(int N, int M, std::vector <int> X, std::vector <int> Y, std::vector <int> W) 
{
    n = N;
    m = M;
    bool isOdd = true;
    bool isX01 = true;
    bool isY0 = true;
 
    for (int i = 1 ; i <= m ; ++i)    
    {
        ++X[i-1];
        ++Y[i-1];
        fish[i].x = X[i-1];
        fish[i].y = Y[i-1];
        fish[i].w = W[i-1];
        isOdd &= (fish[i].x &1);
        isX01 &= (fish[i].x <= 2);
        isY0 &= (fish[i].y == 1);
    }
    
    if (isOdd) return solveOdd();
    if (isX01) return solveX12();
    if (isY0) return solveY1();
    return solveNSmall();
}

Compilation message

fish.cpp: In function 'llong solveY1()':
fish.cpp:79:11: warning: unused variable 'ans' [-Wunused-variable]
   79 |     llong ans = 0;
      |           ^~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 3048 KB Output is correct
2 Correct 27 ms 3792 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 84 ms 10828 KB Output is correct
6 Correct 85 ms 10856 KB Output is correct

Subtask #2
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 60 ms 5932 KB Output is correct
3 Correct 76 ms 10808 KB Output is correct
4 Correct 22 ms 4448 KB Output is correct
5 Correct 28 ms 5568 KB Output is correct
6 Runtime error 1 ms 212 KB Execution failed because the return code was nonzero
7 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 18 ms 3896 KB 1st lines differ - on the 1st token, expected: '21261825233649', found: '20817026671884'
4 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB 1st lines differ - on the 1st token, expected: '3', found: '0'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB 1st lines differ - on the 1st token, expected: '3', found: '0'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB 1st lines differ - on the 1st token, expected: '3', found: '0'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 18 ms 3896 KB 1st lines differ - on the 1st token, expected: '21261825233649', found: '20817026671884'
4 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 3048 KB Output is correct
2 Correct 27 ms 3792 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 84 ms 10828 KB Output is correct
6 Correct 85 ms 10856 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 60 ms 5932 KB Output is correct
9 Correct 76 ms 10808 KB Output is correct
10 Correct 22 ms 4448 KB Output is correct
11 Correct 28 ms 5568 KB Output is correct
12 Runtime error 1 ms 212 KB Execution failed because the return code was nonzero
13 Halted 0 ms 0 KB -