oj.uz

Submission #238120

# Submission time Handle Problem Language Result Execution time Memory
238120 2020-06-10T01:44:38 Z HellAngel Jakarta Skyscrapers (APIO15_skyscraper) C++14
10 / 100
 6 ms 1568 KB 
#include <bits/stdc++.h>
using namespace std;

const int maxn = 50007;

int n, m, a[maxn], start[maxn], len[maxn], dist[maxn];
vector<int> pos[maxn];

priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq;

bool Inside(int x)
{
    return (x >= 0 && x < n);
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen("test.inp", "r")) freopen("test.inp", "r", stdin), freopen("test.out", "w", stdout);
    cin >> n >> m;
    fill_n(dist, n, 1e9);
    for(int i = 1; i <= m; i++)
    {
        cin >> start[i] >> len[i];
        pos[start[i]].push_back(i);
    }
    dist[start[1]] = 0;
    pq.emplace(0, 0);
    while(pq.size())
    {
        pair<int, int> p = pq.top();
        pq.pop();
        if(p.first != dist[p.second]) continue;
        int u = p.second;
        if(u == start[2])
        {
            cout << p.first;
            exit(0);
        }
        for(auto j: pos[u])
        {
            for(int i = 1;;i++)
            {
                int nxt = u + i * len[j];
                bool ok = 0;
                ok |= Inside(nxt);
                if(Inside(nxt) && dist[nxt] > dist[u] + i)
                {
                    dist[nxt] = dist[u] + i;
                    pq.emplace(dist[nxt], nxt);
                }
                nxt = u - i * len[j];
                ok |= Inside(nxt);
                if(Inside(nxt) && dist[nxt] > dist[u] + i)
                {
                    dist[nxt] = dist[u] + i;
                    pq.emplace(dist[nxt], nxt);
                }
                if(!ok) break;
            }
        }
    }
    cout << -1;
}

Compilation message

skyscraper.cpp: In function 'int32_t main()':
skyscraper.cpp:20:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     if(fopen("test.inp", "r")) freopen("test.inp", "r", stdin), freopen("test.out", "w", stdout);
                                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:20:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1536 KB Output is correct
2 Correct 5 ms 1408 KB Output is correct
3 Correct 5 ms 1536 KB Output is correct
4 Correct 6 ms 1536 KB Output is correct
5 Correct 5 ms 1536 KB Output is correct
6 Correct 5 ms 1536 KB Output is correct
7 Correct 6 ms 1536 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1536 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 5 ms 1568 KB Output is correct
4 Correct 5 ms 1536 KB Output is correct
5 Correct 5 ms 1536 KB Output is correct
6 Correct 5 ms 1536 KB Output is correct
7 Correct 5 ms 1536 KB Output is correct
8 Incorrect 5 ms 1536 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1536 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 6 ms 1536 KB Output is correct
4 Correct 5 ms 1536 KB Output is correct
5 Correct 5 ms 1536 KB Output is correct
6 Correct 6 ms 1536 KB Output is correct
7 Correct 5 ms 1536 KB Output is correct
8 Incorrect 5 ms 1536 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 1536 KB Output is correct
2 Correct 6 ms 1536 KB Output is correct
3 Correct 5 ms 1536 KB Output is correct
4 Correct 6 ms 1536 KB Output is correct
5 Correct 5 ms 1536 KB Output is correct
6 Correct 6 ms 1536 KB Output is correct
7 Correct 5 ms 1536 KB Output is correct
8 Incorrect 6 ms 1536 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 1536 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 5 ms 1536 KB Output is correct
4 Correct 5 ms 1536 KB Output is correct
5 Correct 5 ms 1536 KB Output is correct
6 Correct 5 ms 1536 KB Output is correct
7 Correct 5 ms 1536 KB Output is correct
8 Incorrect 5 ms 1536 KB Output isn't correct
9 Halted 0 ms 0 KB -