Submission #146355

#	Time	Username	Problem	Language	Result	Execution time	Memory
146355		muhammad_hokimiyon	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	0 / 100	3 ms	1016 KiB

skyscraper

#include <bits/stdc++.h>
//#pragma GCC optimize("Ofast")

#define LL long long
#define se second
#define fi first

using namespace std;

const int N = 3e4 + 7;
const int mod = 1e9 + 7;
const int B = sqrt(N);

LL n,m;
LL a[N];
LL b[N];
LL d[N];
vector < pair < LL , LL > > v[N];

int main()
{
    ios_base::sync_with_stdio(0);
    //freopen( "input.txt" , "r" , stdin );
    //freopen( "output.txt" , "w" , stdout );

    cin >> n >> m;
    for( int i = 0; i < m; i++ ){
        cin >> a[i] >> b[i];
    }
    for( int i = 1; i <= n; i++ )d[i] = 2e18;
    for( int i = 0; i < m; i++ ){
        for( int j = 0; j < m; j++ ){
            if( i == j )continue;
            if( abs( a[i] - a[j] ) % b[i] == 0 ){
                v[a[i]].push_back({ a[j] , abs( a[i] - a[j] ) / b[i] });
            }
        }
    }
    queue < LL > q;
    q.push(0);
    d[0] = 0;
    while( !q.empty() ){
        LL x = q.front();
        q.pop();
        for( auto y : v[x] ){
            if( d[x] + y.se < d[y.fi] ){
                q.push(y.fi);
                d[y.fi] = d[x] + y.se;
            }
        }
    }
    if( d[1] == 2e18 )d[1] = -1;
    cout << d[1];
}

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