Submission #12198

#	Time	Username	Problem	Language	Result	Execution time	Memory
12198		qja0950	Rail (IOI14_rail)	C++98	30 / 100	106 ms	704 KiB

rail

#include "rail.h"

#include <algorithm>
#include <set>
using namespace std;

#define MAX_N 5005

struct FIRST{
    int dis;
    int p;
}First[MAX_N];
bool operator<(FIRST X, FIRST Y) {
    return X.dis < Y.dis;
}

set<int> C;
set<int>::iterator it;

void findLocation(int N, int first, int location[], int stype[])
{
    for(int i=1; i<N; i++) {
        First[i].dis = getDistance(0, i);
        First[i].p   = i;
    }
    sort(First+1, First+N);
    
    stype[0]     = 1;
    location[0]  = first;
    
    int second = First[1].p;
    stype[second]    = 2;
    location[second] = first + First[1].dis;
    
    int leftC = 0, rightD = second;
    C.insert(location[0]);
    
    for(int i=2; i<N; i++) {
        int nowp = First[i].p;
        
        int DisC = getDistance( leftC, nowp);
        int DisD = getDistance(rightD, nowp);
        
        int positionD = location[ leftC] + DisC;
        it = C.lower_bound(positionD);
        if(it != C.begin()) it--;
        int maxC = *it;
        if(location[rightD] - maxC + positionD - maxC == DisD) {
            stype[nowp]    = 2;
            location[nowp] = positionD;
        }else{
            int positionC = location[rightD] - DisD;
            stype[nowp]    = 1;
            location[nowp] = positionC;
        }
        
        
    }
}

• Subtask 1: 8 / 8
• Subtask 2: 22 / 22
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44