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답안 #315524

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
315524 2020-10-23T03:25:15 Z super_j6 Pinball (JOI14_pinball) C++14
컴파일 오류
 0 ms 0 KB 
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <map>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second

const ll inf = 0x3f3f3f3f3f3f3f3f;
int n, m;
map<int, ll> dpl;
map<int, ll, greater<int>> dpr;

template<typename T>
void add(T &dp, int x, ll y){
	auto &it = dp.insert({x, y}).f;
	it->s = min(it->s, y);
	if(next(it) != dp.end() && next(it)->s <= y) it = dp.erase(it);
	while(it != dp.begin() && (--it)->s >= y) it = dp.erase(it);
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n >> m;
	
	ll ret = !!~-m * inf;
	dpl[1] = 0, dpl[m] = inf, dpr[1] = inf, dpr[m] = 0;
	for(int i = 0; i < n; i++){
		int l, r, x, y;
		cin >> l >> r >> x >> y;
		ll vl = dpl.lower_bound(l)->s, vr = dpr.lower_bound(r)->s;
		ret = min(ret, vl + vr + y);
		add(dpl, x, vl + y), add(dpr, x, vr + y);
	}
	
	cout << (ret < inf ? ret : -1) << endl;

	return 0;
}

Compilation message

pinball.cpp: In instantiation of 'void add(T&, int, long long int) [with T = std::map<int, long long int>]':
pinball.cpp:38:21:   required from here
pinball.cpp:9:11: error: cannot bind non-const lvalue reference of type 'std::_Rb_tree_iterator<std::pair<const int, long long int> >&' to an rvalue of type 'std::_Rb_tree_iterator<std::pair<const int, long long int> >'
    9 | #define f first
pinball.cpp:19:31: note: in expansion of macro 'f'
   19 |  auto &it = dp.insert({x, y}).f;
      |                               ^
pinball.cpp: In instantiation of 'void add(T&, int, long long int) [with T = std::map<int, long long int, std::greater<int> >]':
pinball.cpp:38:42:   required from here
pinball.cpp:9:11: error: cannot bind non-const lvalue reference of type 'std::_Rb_tree_iterator<std::pair<const int, long long int> >&' to an rvalue of type 'std::_Rb_tree_iterator<std::pair<const int, long long int> >'
    9 | #define f first
pinball.cpp:19:31: note: in expansion of macro 'f'
   19 |  auto &it = dp.insert({x, y}).f;
      |                               ^