제출 #714074

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
714074		mseebacher	선물상자 (IOI15_boxes)	C++17	10 / 100	4 ms	2668 KiB

boxes

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
#define MAXI (int)1e5
#define pb(x) push_back(x)

vector<int> ad[MAXI];
vector<bool> vis(MAXI,0);


void dfs(int x){
	if(vis[x]) return;
	vis[x] = 1;
	for(auto s:ad[x]){
		dfs(s);
	}
}

void setIO(string s) {
	freopen((s + ".in").c_str(), "r", stdin);
	freopen((s + ".out").c_str(), "w", stdout);
}  


ll pref(int n,int k,int l,int pos[],int pre){
	ll ans = 0;
	for(int i = 0;i<pre;i+=k){
		ans += pos[i] + min(pos[i],l-pos[i]);
	}
	if(pre%k != 0)ans += pos[pre-1] + min(pos[pre-1],l-pos[pre-1]);
	return ans;
}

ll suff(int n,int k,int l,int pos[],int pre){
	ll ans = 0;
	for(int i = n-1;i>=pre;i-=k){
		ans += (l-pos[i]) + min(pos[i],l-pos[i]);
	}
	if((n-pre)%k != 0)ans += pos[pre] + min(pos[pre],l-pos[pre]);
	return ans;
}

ll delivery(int n,int k,int l,int pos[]){
	 ll ans = 1e18;
	 for(int i = 0;i<=n;i++){
		ans = min(ans,pref(n,k,l,pos,i)+suff(n,k,l,pos,i));
	 }
	 return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

boxes.cpp: In function 'll pref(int, int, int, int*, int)':
boxes.cpp:27:13: warning: unused parameter 'n' [-Wunused-parameter]
   27 | ll pref(int n,int k,int l,int pos[],int pre){
      |         ~~~~^
boxes.cpp: In function 'void setIO(std::string)':
boxes.cpp:22:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |  freopen((s + ".in").c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
boxes.cpp:23:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |  freopen((s + ".out").c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30