oj.uz

Submission #626314

# Submission time Handle Problem Language Result Execution time Memory
626314 2022-08-11T11:28:59 Z jeroenodb Catfish Farm (IOI22_fish) C++17
100 / 100
 220 ms 24276 KB 
#include "fish.h"
#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const ll oo = 1e18;
void cmax(ll& a, ll b) {a=max(a,b);}

long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y, std::vector<int> W) {
    vvi ys(N+1);
    bool allEven=1;
    ll total=0;
    for(int i=0;i<M;++i) {
        if(X[i]%2!=0) allEven=0;
        Y[i]++,X[i]++;
        total+=W[i];
        ys[X[i]].push_back(i);
    }

    vector<vector<ll>> pref(N+1,{0});
    {
    int x=0;
    for(auto& v : ys) {
        sort(all(v),[&](int i, int j) {return Y[i]<Y[j];});
        for(auto& id : v) {
            pref[x].push_back(W[id]);
            id = Y[id];
        }
        pref[x].push_back(0);
        v.insert(v.begin(),0);
        v.push_back(N+1);
        partial_sum(all(pref[x]),pref[x].begin());
        assert(pref[x].size()==v.size());
        x++;
        
    }
    }
    // dynamic programming
    // DP[column][y-pos][state] 
    // state {0: rising, 1: falling}
    // transition going up: 
    array<vector<ll>,2> dp = {vector<ll>{0LL,-oo},{-oo,-oo}};
    ll top = -oo;
    auto getS = [&](int x, int y) {
        auto i = max(0LL,upper_bound(all(ys[x]),y)-ys[x].begin()-1LL);
        return pref[x][i];
    };
    for(int x=1;x<=N;++x) {
        int k = ys[x].size();
        array<vector<ll>,2> ndp = {vector<ll>(k,-oo),vector<ll>(k,-oo)};
        // falling to falling
        {
        int j = ys[x-1].size()-1;
        ll best = -oo;
        for(int i=k-1;i>=0;--i) {
            while(j>=0 and ys[x-1][j]>=ys[x][i]) {
                cmax(best,dp[1][j]);
                --j;
            }
            cmax(ndp[1][i], best-getS(x-1,ys[x][i]) + pref[x][i]);
        }
        }
        // rising to rising
        {
        int j = 0;
        ll best = -oo;
        for(int i=0;i<k;++i) {
            while(j<int(ys[x-1].size()) and ys[x-1][j]<=ys[x][i]) {
                cmax(best,dp[0][j]-getS(x,ys[x-1][j]));
                ++j;
            }
            cmax(ndp[0][i], best + pref[x][i]);
        }
        }
        // falling to rising, far apart
        {
        ll best = *max_element(all(dp[1]));
        for(int i=0;i<k;++i) 
            cmax(ndp[0][i],best+pref[x][i]);
        }
        // falling to rising, case 2
        // {
        // int j = 0;
        // ll best = -oo;
        // for(int i=0;i<k;++i) {
        //     while(j<int(ys[x-1].size()) and ys[x-1][j]<=ys[x][i]) {
        //         cmax(best,dp[1][j]-getS(x,ys[x-1][j])-pref[x-1][j]);
        //         ++j;
        //     }
        //     cmax(ndp[0][i], best + pref[x][i] + getS(x-1, ys[x][i]));
        // }
        // }
        // top to falling
        for(int i=0;i<k;++i) {
            cmax(ndp[1][i],pref[x][i]+top);
        }
        // rising to top
        cmax(top,*max_element(all(dp[0])));
        cmax(top,*max_element(all(dp[1])));
        swap(dp,ndp);
    }
    // falling or top
    auto ans = max(top,*max_element(all(dp[1])));;
    assert(ans<=total);
    return ans;
    
}

Compilation message

fish.cpp: In function 'long long int max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:17:10: warning: variable 'allEven' set but not used [-Wunused-but-set-variable]
   17 |     bool allEven=1;
      |          ^~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 14276 KB Output is correct
2 Correct 65 ms 16248 KB Output is correct
3 Correct 30 ms 11152 KB Output is correct
4 Correct 27 ms 11220 KB Output is correct
5 Correct 146 ms 23256 KB Output is correct
6 Correct 163 ms 23408 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 98 ms 18324 KB Output is correct
3 Correct 120 ms 21444 KB Output is correct
4 Correct 59 ms 14164 KB Output is correct
5 Correct 79 ms 16304 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 27 ms 11204 KB Output is correct
11 Correct 26 ms 11184 KB Output is correct
12 Correct 56 ms 14316 KB Output is correct
13 Correct 63 ms 16324 KB Output is correct
14 Correct 57 ms 14268 KB Output is correct
15 Correct 69 ms 15864 KB Output is correct
16 Correct 59 ms 14292 KB Output is correct
17 Correct 62 ms 15800 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 11236 KB Output is correct
2 Correct 26 ms 11228 KB Output is correct
3 Correct 50 ms 12212 KB Output is correct
4 Correct 46 ms 12628 KB Output is correct
5 Correct 78 ms 15172 KB Output is correct
6 Correct 72 ms 15196 KB Output is correct
7 Correct 78 ms 15204 KB Output is correct
8 Correct 90 ms 15208 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 19 ms 2004 KB Output is correct
18 Correct 17 ms 2388 KB Output is correct
19 Correct 19 ms 2244 KB Output is correct
20 Correct 16 ms 2248 KB Output is correct
21 Correct 16 ms 2248 KB Output is correct
22 Correct 33 ms 4300 KB Output is correct
23 Correct 4 ms 596 KB Output is correct
24 Correct 16 ms 1492 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 4 ms 596 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 19 ms 2004 KB Output is correct
18 Correct 17 ms 2388 KB Output is correct
19 Correct 19 ms 2244 KB Output is correct
20 Correct 16 ms 2248 KB Output is correct
21 Correct 16 ms 2248 KB Output is correct
22 Correct 33 ms 4300 KB Output is correct
23 Correct 4 ms 596 KB Output is correct
24 Correct 16 ms 1492 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 4 ms 596 KB Output is correct
27 Correct 3 ms 724 KB Output is correct
28 Correct 92 ms 9864 KB Output is correct
29 Correct 132 ms 12544 KB Output is correct
30 Correct 134 ms 12332 KB Output is correct
31 Correct 142 ms 12260 KB Output is correct
32 Correct 115 ms 14164 KB Output is correct
33 Correct 139 ms 12256 KB Output is correct
34 Correct 120 ms 12264 KB Output is correct
35 Correct 46 ms 5376 KB Output is correct
36 Correct 142 ms 13516 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 11236 KB Output is correct
2 Correct 26 ms 11228 KB Output is correct
3 Correct 50 ms 12212 KB Output is correct
4 Correct 46 ms 12628 KB Output is correct
5 Correct 78 ms 15172 KB Output is correct
6 Correct 72 ms 15196 KB Output is correct
7 Correct 78 ms 15204 KB Output is correct
8 Correct 90 ms 15208 KB Output is correct
9 Correct 76 ms 15072 KB Output is correct
10 Correct 51 ms 9292 KB Output is correct
11 Correct 114 ms 18408 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 34 ms 11312 KB Output is correct
19 Correct 34 ms 11228 KB Output is correct
20 Correct 26 ms 11144 KB Output is correct
21 Correct 26 ms 11168 KB Output is correct
22 Correct 76 ms 15340 KB Output is correct
23 Correct 113 ms 18396 KB Output is correct
24 Correct 118 ms 18480 KB Output is correct

Subtask #8
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 14276 KB Output is correct
2 Correct 65 ms 16248 KB Output is correct
3 Correct 30 ms 11152 KB Output is correct
4 Correct 27 ms 11220 KB Output is correct
5 Correct 146 ms 23256 KB Output is correct
6 Correct 163 ms 23408 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 98 ms 18324 KB Output is correct
9 Correct 120 ms 21444 KB Output is correct
10 Correct 59 ms 14164 KB Output is correct
11 Correct 79 ms 16304 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 27 ms 11204 KB Output is correct
17 Correct 26 ms 11184 KB Output is correct
18 Correct 56 ms 14316 KB Output is correct
19 Correct 63 ms 16324 KB Output is correct
20 Correct 57 ms 14268 KB Output is correct
21 Correct 69 ms 15864 KB Output is correct
22 Correct 59 ms 14292 KB Output is correct
23 Correct 62 ms 15800 KB Output is correct
24 Correct 30 ms 11236 KB Output is correct
25 Correct 26 ms 11228 KB Output is correct
26 Correct 50 ms 12212 KB Output is correct
27 Correct 46 ms 12628 KB Output is correct
28 Correct 78 ms 15172 KB Output is correct
29 Correct 72 ms 15196 KB Output is correct
30 Correct 78 ms 15204 KB Output is correct
31 Correct 90 ms 15208 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 0 ms 212 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 19 ms 2004 KB Output is correct
49 Correct 17 ms 2388 KB Output is correct
50 Correct 19 ms 2244 KB Output is correct
51 Correct 16 ms 2248 KB Output is correct
52 Correct 16 ms 2248 KB Output is correct
53 Correct 33 ms 4300 KB Output is correct
54 Correct 4 ms 596 KB Output is correct
55 Correct 16 ms 1492 KB Output is correct
56 Correct 1 ms 340 KB Output is correct
57 Correct 4 ms 596 KB Output is correct
58 Correct 3 ms 724 KB Output is correct
59 Correct 92 ms 9864 KB Output is correct
60 Correct 132 ms 12544 KB Output is correct
61 Correct 134 ms 12332 KB Output is correct
62 Correct 142 ms 12260 KB Output is correct
63 Correct 115 ms 14164 KB Output is correct
64 Correct 139 ms 12256 KB Output is correct
65 Correct 120 ms 12264 KB Output is correct
66 Correct 46 ms 5376 KB Output is correct
67 Correct 142 ms 13516 KB Output is correct
68 Correct 76 ms 15072 KB Output is correct
69 Correct 51 ms 9292 KB Output is correct
70 Correct 114 ms 18408 KB Output is correct
71 Correct 1 ms 212 KB Output is correct
72 Correct 0 ms 212 KB Output is correct
73 Correct 0 ms 212 KB Output is correct
74 Correct 0 ms 212 KB Output is correct
75 Correct 0 ms 212 KB Output is correct
76 Correct 0 ms 212 KB Output is correct
77 Correct 34 ms 11312 KB Output is correct
78 Correct 34 ms 11228 KB Output is correct
79 Correct 26 ms 11144 KB Output is correct
80 Correct 26 ms 11168 KB Output is correct
81 Correct 76 ms 15340 KB Output is correct
82 Correct 113 ms 18396 KB Output is correct
83 Correct 118 ms 18480 KB Output is correct
84 Correct 181 ms 22328 KB Output is correct
85 Correct 176 ms 23424 KB Output is correct
86 Correct 178 ms 22940 KB Output is correct
87 Correct 192 ms 24276 KB Output is correct
88 Correct 0 ms 212 KB Output is correct
89 Correct 220 ms 24152 KB Output is correct
90 Correct 172 ms 23460 KB Output is correct
91 Correct 158 ms 23648 KB Output is correct