Submission #394755

#	Time	Username	Problem	Language	Result	Execution time	Memory
394755		juggernaut	Stove (JOI18_stove)	C++14	100 / 100	27 ms	2376 KiB

stove

#include<bits/stdc++.h>
//#include<bits/extc++.h>
#define fr first
#define sc second
using namespace std;
void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
//using namespace __gnu_pbds;
typedef long long ll;
//template<class T>using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
template<class T>void umin(T &a,T b){if(b<a)a=b;}
template<class T>void umax(T &a,T b){if(a<b)a=b;}
#ifdef IOI2021SG
    #define printl(args...)printf(args)
#else
    #define printl(args...)((void)0)
#endif
int n,k,a[100005];
int main(){
    scanf("%d%d",&n,&k);
    for(int i=1;i<=n;i++)scanf("%d",&a[i]);
    sort(a+1,a+1+n);
    int res=a[n]-a[1]+1;
    vector<int>v;
    for(int i=2;i<=n;i++)v.push_back(a[i]-a[i-1]-1);
    sort(v.rbegin(),v.rend());
    k--;
    for(int i=0;i<k;i++)res-=v[i];
    printf("%d",res);
}

Compilation message (stderr)

stove.cpp: In function 'void usaco(std::string)':
stove.cpp:6:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    6 | void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:6:66: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
    6 | void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp: In function 'int main()':
stove.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |     scanf("%d%d",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~
stove.cpp:20:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |     for(int i=1;i<=n;i++)scanf("%d",&a[i]);
      |                          ~~~~~^~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50