Submission #848660

#	Time	Username	Problem	Language	Result	Execution time	Memory
848660		Lib	Overtaking (IOI23_overtaking)	C++17	19 / 100	6 ms	9304 KiB

overtaking

#include "overtaking.h"
#include <bits/stdc++.h>
using namespace std;
long long rspeed[1003];
long long spos[1003];
long long stime[1003];
long long arrtime[1003][1003]; //thoi gian xe k den ben i
vector <long long> temp;
pair<long long, int> sarrtime[1003][1003];
vector <pair<long long, int> > previ;
long long ok[1003];
long long atime[1003];
long long L,N,M,X,Y;
void init(int LL, int NN, vector<long long> T, vector<int> W, int XX, int MM, vector<int> S)
{
	L = LL;
    N = NN;
    M = MM;
    X = XX;
    long long len=L,spd=X;
	int n=N,m=M;
	long long cmax;
	for(int i=1;i<=n;i++){
		stime[i]=T[i-1];
		arrtime[1][i]=stime[i];
		sarrtime[1][i]={stime[i],i};
		previ.push_back({stime[i],i});
	}
	for(int i=1;i<=n;i++){
		rspeed[i]=W[i-1];
	}
	for(int i=1;i<=m;i++){
		spos[i]=S[i-1];
	}
	for(int i=2;i<=m;i++){
		previ.push_back({0,0});
		sort(previ.begin(),previ.end());
		arrtime[i][previ[1].second]=arrtime[i-1][previ[1].second]+(spos[i]-spos[i-1])*rspeed[previ[1].second];
		cmax=arrtime[i][previ[1].second];
		for(int k=2;k<=n;k++){
			cmax=max(cmax,previ[k].first+(spos[i]-spos[i-1])*rspeed[previ[k].second]);
			arrtime[i][previ[k].second]=cmax;
			sarrtime[i][previ[k].second]={arrtime[i][previ[k].second],previ[k].second};
		}
		previ.clear();
		for(int k=1;k<=n;k++){
			previ.push_back({arrtime[i][k],k});
		}
	}
	previ.clear();
}
 
long long arrival_time(long long Y){
	for(int i=1;i<=1000;i++){
		ok[i]=1;
		atime[i]=0;
	}
	for(int i=1;i<=N;i++){
		if(arrtime[1][i]>=Y){
			ok[i]=0;
		}else{
			ok[i]=1;
		}
	}
	atime[1]=Y;
	for(int i=2;i<=M;i++){
		atime[i]=atime[i-1]+(spos[i]-spos[i-1])*X;
		for(int k=1;k<=N;k++){
			if(atime[i-1]<=arrtime[i-1][k]){
				ok[k]=0;
			}
			if(ok[k]==1){
				atime[i]=max(atime[i],arrtime[i][k]);
			}
		}
	}
	long long ans=atime[M];
	return ans;
}

Compilation message (stderr)

overtaking.cpp: In function 'void init(int, int, std::vector<long long int>, std::vector<int>, int, int, std::vector<int>)':
overtaking.cpp:20:15: warning: unused variable 'len' [-Wunused-variable]
   20 |     long long len=L,spd=X;
      |               ^~~
overtaking.cpp:20:21: warning: unused variable 'spd' [-Wunused-variable]
   20 |     long long len=L,spd=X;
      |                     ^~~

• Subtask 0: 0 / 0
• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 26
• Subtask 5: 0 / 35