oj.uz

답안 #661064

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
661064 2022-11-24T07:13:54 Z mychecksedad 메기 농장 (IOI22_fish) C++17
12 / 100
 431 ms 123576 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define pb push_back
const int N = 1e5 + 100;


vector<ll> dp[N][2], pref[N][3], dp_pref[N], dp_suf[N], dp_pref_max[N]; //pref:  0 : itself, 1 : left one, 2 : right one
vector<int> v[N], p[N];

long long max_weights(int n, int m, std::vector<int> x, std::vector<int> y, std::vector<int> w){  

    for(int i = 0; i < m; ++i){
        v[x[i]].pb(i);
        if(x[i] > 0) v[x[i] - 1].pb(i);
        if(x[i] < n - 1) v[x[i] + 1].pb(i);
    }

    for(int i = 0; i <= n; ++i){
        int s = v[i].size() + 1;
        p[i].pb(0);
        for(int a: v[i]) p[i].pb(y[a] + 1);
        sort(p[i].begin(), p[i].end());
        for(int k = 0; k < 3; ++k){
            pref[i][k].resize(s);
        }
        dp[i][0].resize(s);
        dp[i][1].resize(s);
        dp_pref[i].resize(s);
        dp_suf[i].resize(s);
        dp_pref_max[i].resize(s);

        vector<pair<int, int>> all;
        for(int a: v[i]) all.pb({y[a] + 1, a});
        sort(all.begin(), all.end());
        
        for(pair<int, int> &a: all){
            a.first = lower_bound(all.begin(), all.end(), make_pair(a.first, -1)) - all.begin() + 1;
            if(x[a.second] == i) pref[i][0][a.first] = w[a.second];
            else if(x[a.second] == i - 1) pref[i][1][a.first] = w[a.second];
            else pref[i][2][a.first] = w[a.second];
        }   
        for(int k = 0; k < 3; ++k)
            for(int j = 1; j < pref[i][k].size(); ++j) pref[i][k][j] += pref[i][k][j - 1];
    }

    for(int i = 0; i <= n; ++i){
        int s = pref[i][0].size();
        for(int j = 0; j < s; ++j){    
            if(i == 0){
                dp[i][0][j] = dp[i][1][j] = pref[i][2][j];
                continue;
            }

            dp[i][0][j] = pref[i][2][j];

            int pos = upper_bound(p[i - 1].begin(), p[i - 1].end(), p[i][j]) - p[i - 1].begin() - 1;

            if(i == 1){
                dp[i][0][j] += dp_pref[i - 1][pos] + pref[i][1][j];
            }else{  
                int pos2 = upper_bound(p[i - 2].begin(), p[i - 2].end(), p[i][j]) - p[i - 2].begin() - 1;
                dp[i][0][j] += max({dp_pref[i - 1][pos] + pref[i][1][j],
                    dp_suf[i - 2][0],
                    dp_pref_max[i - 2][pos2] + pref[i][1][j] 
                });
            }

            dp[i][1][j] = pref[i][2][j] - pref[i][0][j] + (pos + 1 == dp_suf[i - 1].size() ? 0 : dp_suf[i - 1][pos + 1]);
        }

        for(int j = 0; j < s; ++j){
            if(j == 0){
                dp_pref[i][j] = dp[i][0][j] - pref[i][2][j] - pref[i][0][j];
                dp_pref_max[i][j] = max(dp[i][0][j], dp[i][1][j]) - pref[i][2][j];
            }
            else{
                dp_pref[i][j] = max(dp_pref[i][j - 1], dp[i][0][j] - pref[i][2][j] - pref[i][0][j]);
                dp_pref_max[i][j] = max(dp_pref_max[i][j - 1], max(dp[i][0][j], dp[i][1][j]) - pref[i][2][j]);
            }
        }

        for(int j = s - 1; j >= 0; --j){
            if(j == s - 1){
                dp_suf[i][j] = max(dp[i][0][j], dp[i][1][j]);
            }
            else{
                dp_suf[i][j] = max({dp_suf[i][j + 1], dp[i][0][j], dp[i][1][j]});
            }
        }
    }
    return max(dp[n][0][0], dp[n][1][0]);
}

Compilation message

fish.cpp: In function 'long long int max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:44:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |             for(int j = 1; j < pref[i][k].size(); ++j) pref[i][k][j] += pref[i][k][j - 1];
      |                            ~~^~~~~~~~~~~~~~~~~~~
fish.cpp:69:68: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |             dp[i][1][j] = pref[i][2][j] - pref[i][0][j] + (pos + 1 == dp_suf[i - 1].size() ? 0 : dp_suf[i - 1][pos + 1]);
      |                                                            ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 142 ms 62436 KB Output is correct
2 Correct 164 ms 68332 KB Output is correct
3 Correct 71 ms 51904 KB Output is correct
4 Correct 71 ms 51948 KB Output is correct
5 Correct 431 ms 123576 KB Output is correct
6 Correct 402 ms 116428 KB Output is correct

Subtask #2
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Incorrect 236 ms 81628 KB 1st lines differ - on the 1st token, expected: '40604614618209', found: '40480577213710'
3 Halted 0 ms 0 KB -

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 51860 KB Output is correct
2 Correct 75 ms 51964 KB Output is correct
3 Correct 123 ms 57896 KB Output is correct
4 Correct 104 ms 57932 KB Output is correct
5 Correct 162 ms 69912 KB Output is correct
6 Correct 156 ms 69992 KB Output is correct
7 Correct 160 ms 69984 KB Output is correct
8 Correct 168 ms 69912 KB Output is correct

Subtask #4
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 12 ms 23800 KB Output is correct
3 Correct 12 ms 23808 KB Output is correct
4 Correct 11 ms 23804 KB Output is correct
5 Correct 12 ms 23812 KB Output is correct
6 Correct 12 ms 23780 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 12 ms 23808 KB Output is correct
9 Incorrect 12 ms 23892 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '114136648940'
10 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 12 ms 23800 KB Output is correct
3 Correct 12 ms 23808 KB Output is correct
4 Correct 11 ms 23804 KB Output is correct
5 Correct 12 ms 23812 KB Output is correct
6 Correct 12 ms 23780 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 12 ms 23808 KB Output is correct
9 Incorrect 12 ms 23892 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '114136648940'
10 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 12 ms 23800 KB Output is correct
3 Correct 12 ms 23808 KB Output is correct
4 Correct 11 ms 23804 KB Output is correct
5 Correct 12 ms 23812 KB Output is correct
6 Correct 12 ms 23780 KB Output is correct
7 Correct 12 ms 23720 KB Output is correct
8 Correct 12 ms 23808 KB Output is correct
9 Incorrect 12 ms 23892 KB 1st lines differ - on the 1st token, expected: '216624184325', found: '114136648940'
10 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 51860 KB Output is correct
2 Correct 75 ms 51964 KB Output is correct
3 Correct 123 ms 57896 KB Output is correct
4 Correct 104 ms 57932 KB Output is correct
5 Correct 162 ms 69912 KB Output is correct
6 Correct 156 ms 69992 KB Output is correct
7 Correct 160 ms 69984 KB Output is correct
8 Correct 168 ms 69912 KB Output is correct
9 Correct 172 ms 69972 KB Output is correct
10 Correct 129 ms 58028 KB Output is correct
11 Correct 255 ms 92280 KB Output is correct
12 Correct 14 ms 23780 KB Output is correct
13 Correct 14 ms 23808 KB Output is correct
14 Correct 12 ms 23700 KB Output is correct
15 Correct 13 ms 23804 KB Output is correct
16 Correct 13 ms 23764 KB Output is correct
17 Correct 12 ms 23804 KB Output is correct
18 Correct 70 ms 51868 KB Output is correct
19 Correct 74 ms 51916 KB Output is correct
20 Correct 70 ms 51964 KB Output is correct
21 Correct 72 ms 51968 KB Output is correct
22 Correct 204 ms 69836 KB Output is correct
23 Incorrect 264 ms 92324 KB 1st lines differ - on the 1st token, expected: '77772396150817', found: '81468050166366'
24 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 142 ms 62436 KB Output is correct
2 Correct 164 ms 68332 KB Output is correct
3 Correct 71 ms 51904 KB Output is correct
4 Correct 71 ms 51948 KB Output is correct
5 Correct 431 ms 123576 KB Output is correct
6 Correct 402 ms 116428 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Incorrect 236 ms 81628 KB 1st lines differ - on the 1st token, expected: '40604614618209', found: '40480577213710'
9 Halted 0 ms 0 KB -