Submission #637561

#	Time	Username	Problem	Language	Result	Execution time	Memory
637561		stoyan_malinin	Long Distance Coach (JOI17_coach)	C++14	Compilation error	0 ms	0 KiB

coach

#include <algorithm>
#include <iostream>
#include <vector>
#include <set>

using namespace std;

const int MAXN = 2e5;
const int64_t inf = 1e18;

struct Passanger
{
    int64_t d, c;

    Passanger(){}
    Passanger(int64_t d, int64_t c) : d(d), c(c) {}
};

int64_t X, n, m, W, T;
int64_t sources[MAXN+5];
Passanger passangers[MAXN+5];

int64_t depart[MAXN+5];
int64_t endWaterPoints[MAXN+5];

int findLastPassangerBefore(int64_t rem)
{
    int l = 0, r = m - 1, mid;
    while(l+1<r)
    {
        mid = (l+r)/2;

        if(passangers[mid].d<rem) l = mid;
        else r = mid - 1;
    }

    if(passangers[r].d<rem) return r;
    if(passangers[l].d<rem) return l;
    return -1;
}

void init()
{
    sort(sources, sources+n);
    sort(passangers, passangers+m,
    [](const Passanger& A, const Passanger& B)
    {
        if(A.d!=B.d) return A.d<B.d;
        return A.c<B.c;
    });

    for(int i = 0;i<m;i++) depart[i] = -1;

    for(int i = 0;i<n;i++)
    {
        int ind = findLastPassangerBefore(sources[i]%T);
        if(ind!=-1 && depart[ind]==-1) depart[ind] = sources[i];
    }
    {
        int ind = findLastPassangerBefore(X%T);
        if(ind!=-1 && depart[ind]==-1) depart[ind] = X;
    }

    //for(int i = 0;i<m;i++) cout << depart[i] << " ";
    //cout << '\n';
}

double dp[MAXN+5];

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> X >> n >> m >> W >> T;
    for(int i = 0;i<n;i++) cin >> sources[i];
    for(int i = 0;i<m;i++) cin >> passangers[i].d >> passangers[i].c;
    init();

    int64_t driverWater = X/T + 1;

    int64_t endWaterPointsSum = 0;
    for(int i = 0;i<m;i++)
    {
        endWaterPoints[i] = ((X-passangers[i].d+(T-1))/T)*T + passangers[i].d;
        endWaterPointsSum += endWaterPoints[i];

        //cout << i << "->" << endWaterPoints[i] << '\n';
    }

    int64_t beginWaterPointsSum = 0;
    for(int i = 0;i<m;i++) beginWaterPointsSum += passangers[i].d;

    for(int i = 0;i<m;i++)
    {
        dp[i] = inf;
        if(i!=0) dp[i] = dp[i-1];
        else dp[i] = 0;

        if(depart[i]!=-1)
        {
            int64_t based = (depart[i]/T)*T;
            double changeSum = 0;

            for(int j = i;j>=0;j--)
            {
                double last = ((j==0)?0:dp[j-1]);
                changeSum += (double(based + passangers[j].d - endWaterPoints[j])/double(T))*W + passangers[j].c;

                //cout << i << " " << j << ": " << last << " + " << changeSum << " || " << based + passangers[j].d << '\n';
                dp[i] = min(dp[i], last + changeSum);
            }
        }

        //cout << dp[i] << '\n';
    }

    //cout << endWaterPointsSum << " - " << beginWaterPointsSum << '\n';

    //cout << "all water: " << (endWaterPointsSum-beginWaterPointsSum)/T << '\n';
    int64_t ans = round(dp[m-1]) + ((endWaterPointsSum-beginWaterPointsSum)/T)*W + driverWater*W;
    cout << ans << '\n';
}
/*
19 1 4 8 7
10
1 20
2 10
4 5
6 5
*/

Compilation message (stderr)

coach.cpp: In function 'int main()':
coach.cpp:121:19: error: 'round' was not declared in this scope
  121 |     int64_t ans = round(dp[m-1]) + ((endWaterPointsSum-beginWaterPointsSum)/T)*W + driverWater*W;
      |                   ^~~~~