Submission #785078

#	Time	Username	Problem	Language	Result	Execution time	Memory
785078		Lyrically	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	52 ms	5552 KiB

molecules

#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define pb push_back
#define rep(i,n) for(int i=0;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
int read(){int x;scanf("%d",&x);return x;}
void print(int x){printf("%d\n",x);}
void file(string s)
{
	freopen((s+".in").c_str(),"r",stdin);
	freopen((s+".out").c_str(),"w",stdout);
}
const int mod=998244353;
long long a[200005];
vector<int> find_subset(int l,int r,vector<int> w)
{
	int n=(int)w.size();
	vector<pii> v;
	rep(i,n)
	{
		v.pb({w[i],i});
	}
	sort(v.begin(),v.end());
	rep(i,n){a[i+1]=v[i].first;a[i+1]+=a[i];}
	vector<int> res;
	rep1(i,n)
	{
		int vv=lower_bound(a+1,a+n+1,l+a[i-1])-a;
		if(a[vv]-a[i-1]>=l&&a[vv]-a[i-1]<=r)
		{
			for(int j=i;j<=vv;j++)
			{
				res.pb(v[j-1].second);
			}
			sort(res.begin(),res.end());
			return res;
		}
	}
	return res;
}

Compilation message (stderr)

molecules.cpp: In function 'int read()':
molecules.cpp:7:23: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 | int read(){int x;scanf("%d",&x);return x;}
      |                  ~~~~~^~~~~~~~~
molecules.cpp: In function 'void file(std::string)':
molecules.cpp:11:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  freopen((s+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
molecules.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  freopen((s+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 23 / 23
• Subtask 6: 31 / 31