Submission #106233

#	Time	Username	Problem	Language	Result	Execution time	Memory
106233		Hideo	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	1086 ms	45200 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pb push_back
#define mk make_pair
#define fr first
#define sc second
#define vi vector < int >
#define vl vector < ll >
#define pi pair < int, int >
#define pii pair < int, pi >
#define vii vector < pi >

const int N = 2e5 + 7;
const int INF = 1e9 + 7;

int l[N], p[N], d[N];
int n, m, ans;

vii g[N];

priority_queue < pi > pq;

main(){
    ans = INF;
    cin >> n >> m;
    for (int i = 1; i <= m; i++){
        d[i] = INF;
        scanf("%d%d", &l[i], &p[i]);
    }
    pq.push(mk(0, 1));
    while (!pq.empty()){
        int v = pq.top().sc, c = -pq.top().fr;
        pq.pop();
        if (c >= ans)
            break;
        if (c >= d[v])
            continue;
        if (v == 2){
            ans = c;
            continue;
        }
        if (d[v] == INF){
            for (int j = 1; j <= m; j++)
                if (v != j && l[v] % p[v] == l[j] % p[v])
                    g[v].pb(mk(j, abs(l[j] - l[v]) / p[v]));
        }
        d[v] = c;
        for (pi to : g[v]){
            if (d[to.fr] > d[v] + to.sc)
                pq.push(mk(-d[v] - to.sc, to.fr));
        }
    }
    if (ans == INF)
        cout << -1;
    else
        cout << ans;
}

Compilation message (stderr)

skyscraper.cpp:25:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:30:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &l[i], &p[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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