제출 #121297

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
121297		Plurm	Roller Coaster Railroad (IOI16_railroad)	C++11	0 / 100	90 ms	7540 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;

bool cmpf(pair<int,int> x,pair<int,int> y){
    return x.second < y.second;
}
int prefmin[200005];
int sufmin[200005];
long long plan_roller_coaster(vector<int> s, vector<int> t) {
    int n = (int) s.size();
    vector<pair<int,int> > com;
    for(int i = 0; i < n; i++){
        com.push_back(make_pair(s[i],t[i]));
    }
    sort(com.begin(), com.end(), cmpf);
    long long ans = 0ll;
    for(int i = 0; i < n; i++){
        ans += t[i];
        ans -= s[i];
    }
    prefmin[0] = s[0];
    for(int i = 1; i < n; i++){
        prefmin[i] = min(prefmin[i-1], s[i]);
    }
    sufmin[n-1] = s[n-1];
    for(int i = n-2; i >= 0; i--){
        sufmin[i] = min(sufmin[i+1], s[i]);
    }
    ans = min(ans, ans - t[0] + sufmin[1]);
    for(int i = 1; i < n; i++){
        ans = min(ans, ans - t[i] + min(prefmin[i-1], sufmin[i+1]));
    }
    return ans;
}

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