Submission #123607

#	Time	Username	Problem	Language	Result	Execution time	Memory
123607		baqargam	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	123 ms	7684 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});
    }
    v.push_back({1000000001,n+1});
    v.push_back({1,-n-1});
    sort(v.begin(),v.end());
    for(int i=0;i<v.size();i++){
        int id=v[i].second;
        int val=v[i].first;
        if(id<0)
            bal--;
        else
            bal++;
        if(v[i].first<v[v.size()-1].first && v[i].first!=v[i+1].first)
        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:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++){
                 ~^~~~~~~~~
railroad.cpp:20:13: warning: unused variable 'val' [-Wunused-variable]
         int val=v[i].first;
             ^~~

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