Submission #88595

#	Time	Username	Problem	Language	Result	Execution time	Memory
88595		amiratou	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	250 ms	16132 KiB

railroad

#include <bits/stdc++.h>
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define debug(x) cerr << " - " << #x << ": " << x << endl;
#define debugs(x, y) cerr << " - " << #x << ": " << x << " " << #y << ": " << y << endl;
#define sep() cerr << "--------------------" << endl;
#define all(x) (x).begin(),(x).end()
#define sz(x) (ll)x.size()
#define fi first
#define se second
#define ll long long
#define ii pair<int,int>
#define v vector<int>
#define vv vector<vector<int> >
#define pb push_back
#define INF 15
using namespace std;
set<pair<ll,ll> > myset;
long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    int n = (int) s.size();
    ll maxi,maxval=0,mini,minval=INT_MAX;
    for (int i = 0; i < n; ++i)
    {
    	myset.insert({s[i],i});
    	if(minval>s[i]){
    		minval=s[i];
    		mini=i;
    	}
    	if(maxval<t[i]){
    		maxval=t[i];
    		maxi=i;
    	}
    }
    if(maxi==mini){
    	auto temp=myset.begin();
    	temp++;
    	mini=temp->se;
    }
    myset.erase(myset.find({s[mini],mini}));
    myset.erase(myset.find({s[maxi],maxi}));
    int curr=t[mini];
    while(!myset.empty()){
    	//debug(curr);
    	auto search=myset.lower_bound({curr,0});
    	if(search==myset.end())return INF;
    	auto it=myset.end();
    	it--;
    	if(search!=it&&search->fi!=curr)
    		search++;
    	curr=t[search->se];
    	myset.erase(search);
    }
    //debug(curr);
    if(curr<=s[maxi])
    	return 0;
	return INF;
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:54:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(curr<=s[maxi])
     ^~
railroad.cpp:56:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  return INF;
  ^~~~~~
railroad.cpp:34:5: warning: 'mini' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if(maxi==mini){
     ^~
railroad.cpp:34:5: warning: 'maxi' may be used uninitialized in this function [-Wmaybe-uninitialized]

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