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Submission #30511

# Submission time Handle Problem Language Result Execution time Memory
30511 2017-07-24T08:54:24 Z zoomswk Aliens (IOI16_aliens) C++14
4 / 100
 0 ms 4368 KB 
#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;

vector<pair<int, int>> p;
int L[100005], R[100005];
long long dp[100005][2];

void run(int l, int r, int opt_l, int opt_r, int lv){
    if(l > r) return;
    int mid = (l+r)>>1;
    int new_opt = -1;
    int now = lv&1, prev = !now;
    for(int x=opt_l; x<=min(opt_r, mid); x++){
        long long cst = dp[x-1][prev]+1LL*(R[mid]-L[x]+1)*(R[mid]-L[x]+1)-(R[x-1]-L[x]+1 > 0 ? 1LL*(R[x-1]-L[x]+1)*(R[x-1]-L[x]+1): 0LL);
        if(cst < dp[mid][now]){
            dp[mid][now] = cst;
            new_opt = x;
        }
    }
    run(l, mid-1, opt_l, new_opt, lv);
    run(mid+1, r, new_opt, opt_r, lv);
    return;
}

long long take_photos(int n, int m, int k, std::vector<int> r, std::vector<int> c){
    for(int i=0; i<n; i++) p.push_back({min(r[i], c[i]), -max(r[i], c[i])});
    sort(p.begin(), p.end());
    int N=1, tmp_mx=-1;
    for(int i=0; i<n; i++){
        if(-p[i].second > tmp_mx){
            L[N] = p[i].first, R[N] = -p[i].second;
            tmp_mx = -p[i].second;
            N++;
        }
    }
    N--;
    R[0] = -1e9;
    for(int i=1; i<=min(N, k); i++){
        int now = i&1, prev = !now;
        for(int j=1; j<=N; j++) dp[j][now] = 1e18;
        run(1, N, 1, N, i);
    }
    return dp[N][min(N, k)&1];
}

Compilation message

aliens.cpp: In function 'long long int take_photos(int, int, int, std::vector<int>, std::vector<int>)':
aliens.cpp:40:24: warning: unused variable 'prev' [-Wunused-variable]
         int now = i&1, prev = !now;
                        ^

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4368 KB Correct answer: answer = 4
2 Correct 0 ms 4368 KB Correct answer: answer = 4
3 Correct 0 ms 4368 KB Correct answer: answer = 4
4 Correct 0 ms 4368 KB Correct answer: answer = 12
5 Correct 0 ms 4368 KB Correct answer: answer = 52
6 Correct 0 ms 4368 KB Correct answer: answer = 210
7 Correct 0 ms 4368 KB Correct answer: answer = 88
8 Correct 0 ms 4368 KB Correct answer: answer = 7696
9 Correct 0 ms 4368 KB Correct answer: answer = 1
10 Correct 0 ms 4368 KB Correct answer: answer = 2374
11 Correct 0 ms 4368 KB Correct answer: answer = 9502
12 Correct 0 ms 4368 KB Correct answer: answer = 49
13 Correct 0 ms 4368 KB Correct answer: answer = 151
14 Correct 0 ms 4368 KB Correct answer: answer = 7550
15 Correct 0 ms 4368 KB Correct answer: answer = 7220
16 Correct 0 ms 4368 KB Correct answer: answer = 7550
17 Correct 0 ms 4368 KB Correct answer: answer = 10000
18 Correct 0 ms 4368 KB Correct answer: answer = 10000
19 Correct 0 ms 4368 KB Correct answer: answer = 624
20 Correct 0 ms 4368 KB Correct answer: answer = 10000

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4368 KB Correct answer: answer = 1
2 Incorrect 0 ms 4368 KB Wrong answer: output = 1, expected = 4
3 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4368 KB Correct answer: answer = 4
2 Correct 0 ms 4368 KB Correct answer: answer = 4
3 Correct 0 ms 4368 KB Correct answer: answer = 4
4 Correct 0 ms 4368 KB Correct answer: answer = 12
5 Correct 0 ms 4368 KB Correct answer: answer = 52
6 Correct 0 ms 4368 KB Correct answer: answer = 210
7 Correct 0 ms 4368 KB Correct answer: answer = 88
8 Correct 0 ms 4368 KB Correct answer: answer = 7696
9 Correct 0 ms 4368 KB Correct answer: answer = 1
10 Correct 0 ms 4368 KB Correct answer: answer = 2374
11 Correct 0 ms 4368 KB Correct answer: answer = 9502
12 Correct 0 ms 4368 KB Correct answer: answer = 49
13 Correct 0 ms 4368 KB Correct answer: answer = 151
14 Correct 0 ms 4368 KB Correct answer: answer = 7550
15 Correct 0 ms 4368 KB Correct answer: answer = 7220
16 Correct 0 ms 4368 KB Correct answer: answer = 7550
17 Correct 0 ms 4368 KB Correct answer: answer = 10000
18 Correct 0 ms 4368 KB Correct answer: answer = 10000
19 Correct 0 ms 4368 KB Correct answer: answer = 624
20 Correct 0 ms 4368 KB Correct answer: answer = 10000
21 Correct 0 ms 4368 KB Correct answer: answer = 1
22 Incorrect 0 ms 4368 KB Wrong answer: output = 1, expected = 4
23 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4368 KB Correct answer: answer = 4
2 Correct 0 ms 4368 KB Correct answer: answer = 4
3 Correct 0 ms 4368 KB Correct answer: answer = 4
4 Correct 0 ms 4368 KB Correct answer: answer = 12
5 Correct 0 ms 4368 KB Correct answer: answer = 52
6 Correct 0 ms 4368 KB Correct answer: answer = 210
7 Correct 0 ms 4368 KB Correct answer: answer = 88
8 Correct 0 ms 4368 KB Correct answer: answer = 7696
9 Correct 0 ms 4368 KB Correct answer: answer = 1
10 Correct 0 ms 4368 KB Correct answer: answer = 2374
11 Correct 0 ms 4368 KB Correct answer: answer = 9502
12 Correct 0 ms 4368 KB Correct answer: answer = 49
13 Correct 0 ms 4368 KB Correct answer: answer = 151
14 Correct 0 ms 4368 KB Correct answer: answer = 7550
15 Correct 0 ms 4368 KB Correct answer: answer = 7220
16 Correct 0 ms 4368 KB Correct answer: answer = 7550
17 Correct 0 ms 4368 KB Correct answer: answer = 10000
18 Correct 0 ms 4368 KB Correct answer: answer = 10000
19 Correct 0 ms 4368 KB Correct answer: answer = 624
20 Correct 0 ms 4368 KB Correct answer: answer = 10000
21 Correct 0 ms 4368 KB Correct answer: answer = 1
22 Incorrect 0 ms 4368 KB Wrong answer: output = 1, expected = 4
23 Halted 0 ms 0 KB -

Subtask #5
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4368 KB Correct answer: answer = 4
2 Correct 0 ms 4368 KB Correct answer: answer = 4
3 Correct 0 ms 4368 KB Correct answer: answer = 4
4 Correct 0 ms 4368 KB Correct answer: answer = 12
5 Correct 0 ms 4368 KB Correct answer: answer = 52
6 Correct 0 ms 4368 KB Correct answer: answer = 210
7 Correct 0 ms 4368 KB Correct answer: answer = 88
8 Correct 0 ms 4368 KB Correct answer: answer = 7696
9 Correct 0 ms 4368 KB Correct answer: answer = 1
10 Correct 0 ms 4368 KB Correct answer: answer = 2374
11 Correct 0 ms 4368 KB Correct answer: answer = 9502
12 Correct 0 ms 4368 KB Correct answer: answer = 49
13 Correct 0 ms 4368 KB Correct answer: answer = 151
14 Correct 0 ms 4368 KB Correct answer: answer = 7550
15 Correct 0 ms 4368 KB Correct answer: answer = 7220
16 Correct 0 ms 4368 KB Correct answer: answer = 7550
17 Correct 0 ms 4368 KB Correct answer: answer = 10000
18 Correct 0 ms 4368 KB Correct answer: answer = 10000
19 Correct 0 ms 4368 KB Correct answer: answer = 624
20 Correct 0 ms 4368 KB Correct answer: answer = 10000
21 Correct 0 ms 4368 KB Correct answer: answer = 1
22 Incorrect 0 ms 4368 KB Wrong answer: output = 1, expected = 4
23 Halted 0 ms 0 KB -

Subtask #6
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4368 KB Correct answer: answer = 4
2 Correct 0 ms 4368 KB Correct answer: answer = 4
3 Correct 0 ms 4368 KB Correct answer: answer = 4
4 Correct 0 ms 4368 KB Correct answer: answer = 12
5 Correct 0 ms 4368 KB Correct answer: answer = 52
6 Correct 0 ms 4368 KB Correct answer: answer = 210
7 Correct 0 ms 4368 KB Correct answer: answer = 88
8 Correct 0 ms 4368 KB Correct answer: answer = 7696
9 Correct 0 ms 4368 KB Correct answer: answer = 1
10 Correct 0 ms 4368 KB Correct answer: answer = 2374
11 Correct 0 ms 4368 KB Correct answer: answer = 9502
12 Correct 0 ms 4368 KB Correct answer: answer = 49
13 Correct 0 ms 4368 KB Correct answer: answer = 151
14 Correct 0 ms 4368 KB Correct answer: answer = 7550
15 Correct 0 ms 4368 KB Correct answer: answer = 7220
16 Correct 0 ms 4368 KB Correct answer: answer = 7550
17 Correct 0 ms 4368 KB Correct answer: answer = 10000
18 Correct 0 ms 4368 KB Correct answer: answer = 10000
19 Correct 0 ms 4368 KB Correct answer: answer = 624
20 Correct 0 ms 4368 KB Correct answer: answer = 10000
21 Correct 0 ms 4368 KB Correct answer: answer = 1
22 Incorrect 0 ms 4368 KB Wrong answer: output = 1, expected = 4
23 Halted 0 ms 0 KB -