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Submission #142482

# Submission time Handle Problem Language Result Execution time Memory
142482 2019-08-09T09:05:02 Z alextodoran Pinball (JOI14_pinball) C++14
29 / 100
 126 ms 6136 KB 
#include <bits/stdc++.h>

#define M_MAX 202
#define N_MAX 602
#define ll long long

using namespace std;

const ll INF = 100000000000000001;

struct Device
{
    int l, r;
    int hole;
    ll cost;
};

int n, m;

Device devices[M_MAX];

struct Object
{
    int pos;
    char type;
    int index;
};

int f (char type)
{
    if(type == 'L')
        return 1;
    if(type == 'H')
        return 2;
    if(type == 'R')
        return 3;
}

bool operator < (const Object &a, const Object &b)
{
    if(a.pos != b.pos)
        return a.pos < b.pos;
    return f(a.type) < f(b.type);
}

vector <Object> objects;

ll dp[2][N_MAX][N_MAX];

set <int> active;

int main()
{
    cin >> m >> n;
    for(int i = 1; i <= m; i++)
    {
        cin >> devices[i].l >> devices[i].r >> devices[i].hole >> devices[i].cost;
        objects.push_back(Object{devices[i].l, 'L', i});
        objects.push_back(Object{devices[i].r, 'R', i});
        objects.push_back(Object{devices[i].hole, 'H', i});
    }
    sort(objects.begin(), objects.end());
    int pos = 1;
    int lastR = 0;
    for(int i = 0; i < objects.size(); i++)
    {
        if(i > 0 && active.empty() && objects[i].pos - lastR > 1)
        {
            cout << "-1\n";
            return 0;
        }
        if(objects[i].type == 'L')
            active.insert(objects[i].index);
        else if(objects[i].type == 'R')
        {
            lastR = objects[i].pos;
            active.erase(objects[i].index);
        }
        if(i > 0 && objects[i].pos > objects[i - 1].pos)
            pos++;
        if(objects[i].type == 'L')
            devices[objects[i].index].l = pos;
        if(objects[i].type == 'R')
            devices[objects[i].index].r = pos;
        if(objects[i].type == 'H')
            devices[objects[i].index].hole = pos;
    }
    if(n > objects.back().pos || objects.front().pos > 1)
    {
        cout << "-1\n";
        return 0;
    }
    n = pos;
    for(int i = 0; i <= 1; i++)
        for(int l = 0; l <= n + 1; l++)
            for(int r = 0; r <= n + 1; r++)
                dp[i][l][r] = INF;
    dp[0][1][n] = 0;
    for(int i = 1; i <= m; i++)
        for(int l = n; l >= 1; l--)
            for(int r = l; r <= n; r++)
            {
                dp[i & 1][l][r] = min(dp[i & 1 ^ 1][l][r], min(dp[i & 1][l + 1][r], dp[i & 1][l][r - 1]));
                if(devices[i].hole < l || devices[i].hole > r)
                    continue;
                int l1 = l, r1 = r;
                l1 = min(l1, devices[i].l);
                r1 = max(r1, devices[i].r);
                dp[i & 1][l][r] = min(dp[i & 1][l][r], dp[i & 1 ^ 1][l1][r1] + devices[i].cost);
            }
    ll ans = INF;
    for(int i = 1; i <= n; i++)
        ans = min(ans, dp[m & 1][i][i]);
    if(ans == INF)
        cout << "-1\n";
    else
        cout << ans << "\n";
    return 0;
}

Compilation message

pinball.cpp: In function 'int main()':
pinball.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < objects.size(); i++)
                    ~~^~~~~~~~~~~~~~~~
pinball.cpp:103:44: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
                 dp[i & 1][l][r] = min(dp[i & 1 ^ 1][l][r], min(dp[i & 1][l + 1][r], dp[i & 1][l][r - 1]));
                                          ~~^~~
pinball.cpp:109:61: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
                 dp[i & 1][l][r] = min(dp[i & 1][l][r], dp[i & 1 ^ 1][l1][r1] + devices[i].cost);
                                                           ~~^~~
pinball.cpp: In function 'int f(char)':
pinball.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 632 KB Output is correct
5 Correct 2 ms 632 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 632 KB Output is correct
5 Correct 2 ms 632 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 6 ms 1144 KB Output is correct
10 Correct 18 ms 2296 KB Output is correct
11 Correct 29 ms 2936 KB Output is correct
12 Correct 120 ms 6008 KB Output is correct
13 Correct 126 ms 6136 KB Output is correct
14 Correct 122 ms 6100 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 632 KB Output is correct
5 Correct 2 ms 632 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 6 ms 1144 KB Output is correct
10 Correct 18 ms 2296 KB Output is correct
11 Correct 29 ms 2936 KB Output is correct
12 Correct 120 ms 6008 KB Output is correct
13 Correct 126 ms 6136 KB Output is correct
14 Correct 122 ms 6100 KB Output is correct
15 Correct 4 ms 1144 KB Output is correct
16 Runtime error 3 ms 504 KB Execution killed with signal 11 (could be triggered by violating memory limits)
17 Halted 0 ms 0 KB -

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 632 KB Output is correct
5 Correct 2 ms 632 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 6 ms 1144 KB Output is correct
10 Correct 18 ms 2296 KB Output is correct
11 Correct 29 ms 2936 KB Output is correct
12 Correct 120 ms 6008 KB Output is correct
13 Correct 126 ms 6136 KB Output is correct
14 Correct 122 ms 6100 KB Output is correct
15 Correct 4 ms 1144 KB Output is correct
16 Runtime error 3 ms 504 KB Execution killed with signal 11 (could be triggered by violating memory limits)
17 Halted 0 ms 0 KB -