oj.uz

Submission #255621

# Submission time Handle Problem Language Result Execution time Memory
255621 2020-08-01T12:54:20 Z tleontest1 Stove (JOI18_stove) C++17
100 / 100
 77 ms 8788 KB 
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target ("avx2")

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long lo;
typedef pair< lo,lo > PII;
typedef pair< lo,PII > PIII;
 
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)
 
const lo MAX = -1000000000000000000;
const lo MIN = 1000000000000000000;
const lo inf = 1000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 500005;
const lo mod = 1000000007;
 
int n,m,b[li],a[li],k,flag,t,fa[li],vis[li];
int cev;
multiset <PIII> st;
string s;
vector<int> v;
 
inline int dsu(int x){
	if(x==fa[x])return x;
	return fa[x]=dsu(fa[x]);
}
 
int main(void){
	scanf("%d %d",&n,&m);
	FOR fa[i]=i;
	int at=n-m;
	FOR{
		scanf("%d",&a[i]);
		if(i>1)st.insert(mp(a[i]-a[i-1],mp(i,i-1)));
	}
	while(at>0){
		at--;
		PIII p;
		auto it=st.begin();
		st.erase(it);
		p=*it;
		fa[dsu(p.se.fi)]=dsu(p.se.se);
		cev+=p.fi;
		//~ cout<<cev<<endl;
	}
	FOR{
		if(vis[dsu(i)]==0)cev++;
		vis[dsu(i)]=1;
	}
	printf("%d\n",cev);
	return 0;
}

Compilation message

stove.cpp: In function 'int main()':
stove.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~
stove.cpp:47:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
   ~~~~~^~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 70 ms 8316 KB Output is correct
17 Correct 69 ms 8568 KB Output is correct
18 Correct 73 ms 8788 KB Output is correct
19 Correct 77 ms 8716 KB Output is correct
20 Correct 69 ms 8696 KB Output is correct
21 Correct 60 ms 8696 KB Output is correct
22 Correct 62 ms 8696 KB Output is correct
23 Correct 62 ms 8696 KB Output is correct
24 Correct 60 ms 8696 KB Output is correct