Submission #123597

#	Time	Username	Problem	Language	Result	Execution time	Memory
123597		baqargam	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	131 ms	13448 KiB

railroad

#include "bits/stdc++.h"
#include "railroad.h"

using namespace std;

long long j,l,d[400005],g[100],bal;
vector<pair<int,int> >v;

long long plan_roller_coaster(vector<int> s, vector<int> t) {
    int n = (int) s.size();
    for(int i=1;i<=n;i++){
        v.push_back({s[i-1],i});
        v.push_back({t[i-1],-i});
    }
    sort(v.begin(),v.end());
    for(int i=0;i<2*n;i++){
        int id=v[i].second;
        int val=v[i].first;
        if(id>0)
        {
            id=-id;
            if(d[id]==0)
                bal--;
            else
                bal++;
            d[id]=1;
        }
        else
        {
            if(d[id]==0)
                bal++;
            else
                bal--;
            d[id]=1;
        }
        if(bal>0) return 0;
    }
    return 1;
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:18:13: warning: unused variable 'val' [-Wunused-variable]
         int val=v[i].first;
             ^~~
railroad.cpp:22:20: warning: array subscript is below array bounds [-Warray-bounds]
             if(d[id]==0)
                ~~~~^
railroad.cpp:26:17: warning: array subscript is below array bounds [-Warray-bounds]
             d[id]=1;
             ~~~~^

• Subtask 1: 0 / 11
• Subtask 2: 0 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36