Submission #766346

#	Time	Username	Problem	Language	Result	Execution time	Memory
766346		Gabi88	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	0 / 100	98 ms	262144 KiB

skyscraper

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

int n, m, zg[30009], sk[30009], tmp, v[20009][20009];

int reks(int pos, int sum){
	if (v[0][pos] == -1 or v[0][pos] > sum) v[0][pos] = sum;
	else if (v[0][pos] < sum) return n*n+30;
	if (pos == 1){
		if (v[0][1] == -1) return v[0][1] = sum;
		else return v[0][1] = min(v[0][1], sum);
	}
	int mini = n*n+20;
	for(int i=0; i<m; i++){
		if (abs(zg[i] - zg[pos]) % sk[pos] == 0 and i != pos){
			if (v[pos][i] == -1) v[pos][i] = abs(zg[i] - zg[pos]) / sk[pos];
			if (v[0][i] == -1 or v[0][i] > v[0][pos] + v[pos][i]) v[0][i] = v[0][pos] + v[pos][i];
			mini = min(reks(i, sum + v[pos][i]), mini);
		}
	}
	return mini;
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0); cin >> n >> m; memset(v, -1, sizeof v);
	for(int i=0; i<m; i++) cin >> zg[i] >> sk[i];
	tmp = reks(0, 0);
	if (tmp > n*n) cout << -1;
	else cout << tmp;
	return 0;
}

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