Submission #668154

#	Time	Username	Problem	Language	Result	Execution time	Memory
668154		mhn2	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	22 / 100	1101 ms	68828 KiB

skyscraper

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
#define pb push_back
#define endl '\n'
using namespace std;

const int N = 3e4+5;
int b[N], p[N];
ll d[N];
vector<pii> adj[N];

int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= m; i++) {
        cin >> b[i] >> p[i];
        d[i] = -1;
    }

    for (int i = 1; i <= m; i++)
        for (int j = 1; j <= m; j++)
            if (i != j && abs(b[i]-b[j]) % p[i] == 0)
                adj[i].pb(make_pair(j, abs(b[i]-b[j]) / p[i]));
    
    set<pll> q;
    q.insert(make_pair(0, 1));
    while (q.size()) {
        auto it = --q.end();
        ll v = it->S, w = -it->F;
        q.erase(it);

        if (d[v] != -1)
            continue;
        d[v] = w;

        for (int i = 0; i < adj[v].size(); i++)
            q.insert(make_pair(-w-adj[v][i].S, adj[v][i].F));
    }

    cout << d[2];
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:41:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         for (int i = 0; i < adj[v].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43