Submission #695140

#	Time	Username	Problem	Language	Result	Execution time	Memory
695140		Farhan_HY	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	0 / 100	14 ms	23824 KiB

skyscraper

#include <bits/stdc++.h>
#define int long long
#define float double
#define pb push_back
#define F first
#define S second
#define T int t; cin >> t; while(t--)
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

using namespace std;
/// Benzema is the best player in the world
const int N = 1e6 + 6;
const int M = 1e3 + 3;
const int mod = 1e9 + 7;
const int inf = 1e9;
const int dx[] = {-1, 1, 0, 0};
const int dy[] = {0, 0, -1, 1};
const int LOG = 28;
int n, m;
int p[N], dist[N];
vector<int> v[N];
priority_queue<pair<int, int>> q;
bool vis[N];

void dij() {
    for(int i = 1; i <= n; i++) dist[i] = inf;
    q.push({0, 1});
    dist[1] = 0;
    while(!q.empty()) {
        int u = q.top().S;
        q.pop();
        if (vis[u]) continue;
        vis[u] = 1;
        for(auto x: v[u]) {
            int i = u, cnt = 0;
            while(i >= 1) {
                if (dist[i] > dist[u] + cnt)
                    dist[i] = dist[u] + cnt, q.push({-dist[i], i});
                i -= p[x];
                cnt++;
            }
            cnt = 0, i = u;
            while(i <= n) {
                if (dist[i] > dist[u] + cnt)
                    dist[i] = dist[u] + cnt, q.push({-dist[i], i});
                i += p[x];
                cnt++;
            }
        }
    }
}

main() {
    IOS
    cin >> n >> m;
    for(int i = 1; i <= m; i++) {
        int b;
        cin >> b >> p[i];
        v[b + 1].push_back(i);
    }
    dij();
    if (dist[2] == inf) dist[2] = -1;
    cout << dist[2];
}

Compilation message (stderr)

skyscraper.cpp:53:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   53 | main() {
      | ^~~~

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