제출 #354729

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
354729		kylych03	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	559 ms	32420 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
//#include "grader.cpp"
#define ll long long
using namespace std;
long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    int n = (int) s.size();
    
    map <ll, ll> mp;
	map <ll, ll> ::iterator it;
	
	for(int i = 0 ; i < n;i++){
    	mp[s[i]]--;
		mp[t[i]]++;
    }
    mp[0]++;
    ll cnt = 0, res, last = 0;
    
    for( it = mp.begin() ; it!=mp.end() ; it++){
    	cnt += it->second;	
		//cout << cnt<< " - " <<it->first<<" - " <<it->second<<endl;
    	if(cnt < 0){
    	//	cout << cnt <<" ok " <<it->first <<" - " << last << endl; 	
			res+= ( cnt * (it->first - last) );
		}
		last = it->first;
		
    }
    
    return -1ll*res;
}

컴파일 시 표준 에러 (stderr) 메시지

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:30:17: warning: 'res' may be used uninitialized in this function [-Wmaybe-uninitialized]
   30 |     return -1ll*res;
      |                 ^~~

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