oj.uz

Submission #68803

# Submission time Handle Problem Language Result Execution time Memory
68803 2018-08-18T13:55:39 Z FedericoS Jakarta Skyscrapers (APIO15_skyscraper) C++14
10 / 100
 4 ms 1400 KB 
#pragma GCC optimize("Ofast")
#include <iostream>
#include <vector>
#include <deque>
using namespace std;
typedef pair<int,pair<int,int>> pp;

int N,M;
int B[30005],P[30005];
vector<int> V[30005];
deque<pp> Q;

int main(){

	cin>>N>>M;
	for(int i=0;i<M;i++){
		cin>>B[i]>>P[i];
		if(i)
			V[B[i]].push_back(i);
	}

	//indice distanza posizione

	Q.push_back({0,{0,B[0]}});

	while(!Q.empty()){

		pp p=Q.front();
		Q.pop_front();

		//cout<<Q.size()<<" "<<p.first<<" "<<p.second.first<<" "<<p.second.second<<endl;

		if(p.first==1){
			cout<<p.second.first;
			return 0;
		}

		for(int x:V[p.second.second])
			Q.push_front({x,{p.second.first,B[x]}});
		V[p.second.second].clear();

		if(p.second.second==B[p.first]){

			for(int k=1;;k++){
				if(p.second.second-k*P[p.first]<0)
					break;
				if(!V[p.second.second-k*P[p.first]].empty()){
					Q.push_back({p.first,{p.second.first+k,p.second.second-k*P[p.first]}});
					break;
				}
			}

			for(int k=1;;k++){
				if(p.second.second+k*P[p.first]>=N)
					break;
				if(!V[p.second.second+k*P[p.first]].empty()){
					Q.push_back({p.first,{p.second.first+k,p.second.second+k*P[p.first]}});
					break;
				}
			}			

		}

		if(p.second.second<B[p.first]){
			
			for(int k=1;;k++){
				if(p.second.second-k*P[p.first]<0)
					break;
				if(!V[p.second.second-k*P[p.first]].empty()){
					Q.push_back({p.first,{p.second.first+k,p.second.second-k*P[p.first]}});
					break;
				}
			}

		}

		if(p.second.second>B[p.first]){
			
			for(int k=1;;k++){
				if(p.second.second+k*P[p.first]>=N)
					break;
				if(!V[p.second.second+k*P[p.first]].empty()){
					Q.push_back({p.first,{p.second.first+k,p.second.second+k*P[p.first]}});
					break;
				}
			}	

		}

	}

	cout<<-1;

}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 964 KB Output is correct
2 Correct 3 ms 1160 KB Output is correct
3 Correct 3 ms 1228 KB Output is correct
4 Correct 3 ms 1236 KB Output is correct
5 Correct 3 ms 1236 KB Output is correct
6 Correct 2 ms 1236 KB Output is correct
7 Correct 3 ms 1304 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1304 KB Output is correct
2 Correct 2 ms 1304 KB Output is correct
3 Correct 3 ms 1304 KB Output is correct
4 Correct 3 ms 1304 KB Output is correct
5 Correct 3 ms 1304 KB Output is correct
6 Correct 3 ms 1304 KB Output is correct
7 Correct 3 ms 1304 KB Output is correct
8 Correct 3 ms 1352 KB Output is correct
9 Incorrect 2 ms 1352 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1352 KB Output is correct
2 Correct 2 ms 1352 KB Output is correct
3 Correct 2 ms 1352 KB Output is correct
4 Correct 3 ms 1352 KB Output is correct
5 Correct 3 ms 1352 KB Output is correct
6 Correct 2 ms 1352 KB Output is correct
7 Correct 2 ms 1352 KB Output is correct
8 Correct 3 ms 1352 KB Output is correct
9 Incorrect 3 ms 1368 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1368 KB Output is correct
2 Correct 3 ms 1368 KB Output is correct
3 Correct 3 ms 1384 KB Output is correct
4 Correct 4 ms 1384 KB Output is correct
5 Correct 2 ms 1400 KB Output is correct
6 Correct 2 ms 1400 KB Output is correct
7 Correct 3 ms 1400 KB Output is correct
8 Correct 3 ms 1400 KB Output is correct
9 Incorrect 3 ms 1400 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1400 KB Output is correct
2 Correct 3 ms 1400 KB Output is correct
3 Correct 3 ms 1400 KB Output is correct
4 Correct 3 ms 1400 KB Output is correct
5 Correct 2 ms 1400 KB Output is correct
6 Correct 3 ms 1400 KB Output is correct
7 Correct 3 ms 1400 KB Output is correct
8 Correct 2 ms 1400 KB Output is correct
9 Incorrect 3 ms 1400 KB Output isn't correct
10 Halted 0 ms 0 KB -