Submission #656947

#	Time	Username	Problem	Language	Result	Execution time	Memory
656947		Ronin13	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	10 / 100	1 ms	212 KiB

skyscraper

#include <bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
#define ull unsigned ll
using namespace std;

int main(){
    int n; cin >> n;
    int m; cin >> m;
    vector <vector <int> > g(m + 1);
    int b[m], p[m];
    for(int i = 0; i < m; i++){
        cin >> b[i] >> p[i];
    }
    int nx;
    bool used[m + 1];
    fill(used, used + m, false);
    ll d[m];
    fill(d, d + m, 1e9);
    d[0] = 0;
    int cur = 0;
    for(int it = 1; it <= m; it++){
        if(used[cur]) break;
        used[cur] = 1;
        ll mn = 1e9, mni = cur;
        for(int j = 0; j < m; j++){
            if(used[j]) continue;
            ll x = abs(b[j] - b[cur]);
            if(x % p[cur]) continue;
            ll v = x / p[cur];
            d[j] = min(d[j], d[cur] + v);
            if(mn > d[j]) mni = j, mn = d[j];
        }
        cur = mni;

    }
    if(d[1] == 1e9)
        d[1] = -1;
    cout << d[1];
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:20:9: warning: unused variable 'nx' [-Wunused-variable]
   20 |     int nx;
      |         ^~

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