Submission #714077

#	Time	Username	Problem	Language	Result	Execution time	Memory
714077		mseebacher	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	489 ms	209580 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 delivery(int n,int k,int l,int pos[]){
	 ll ans = 1e18;
	 vector<ll> pref(n+1,0);
	 vector<ll> suff(n+2,0);
	 for(int i = 1;i<=n;i++) pref[i] = 2*pos[i-1] + pref[(max(0,i-k))];
	 for(int i = n;i>0;i--) suff[i] = 2*(l-pos[i-1]) + suff[min(n+1,i+k)];
	 
	 for(int i = 0;i<=n;i++){
		ans = min(ans,pref[i]+suff[i+1]);
		ans = min(ans,pref[i]+l+suff[min(n+1,i+k+1)]);
	 }
	 return ans;
}

Compilation message (stderr)

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