Submission #30842

#	Time	Username	Problem	Language	Result	Execution time	Memory
30842		Kerim	Schools (IZhO13_school)	C++14	0 / 100	2000 ms	3136 KiB

school

#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
PII arr[MAXN];
bool cmp(PII x,PII y){
	return (x.ss-x.ff<y.ss-y.ff);
}
int main(){
	//~ #ifndef ONLINE_JUDGE
    //~ freopen("file.in", "r", stdin);
	//~ #endif	
	int n,a,b;
	scanf("%d%d%d",&n,&a,&b);
	for(int i=1;i<=n;i++)
		scanf("%d%d",&arr[i].ff,&arr[i].ss);
	sort(arr+1,arr+n+1,cmp);	
	ll ans=0;
	for(int i=a;i<=n-b;i++){
		vector<int>a1,a2;
		for(int j=1;j<=i;j++)
			a1.pb(arr[j].ff);
		for(int j=i+1;j<=n;j++)
			a2.pb(arr[j].ss);
		sort(all(a1));reverse(all(a1));
		sort(all(a2));reverse(all(a2));	
		ll res=0;
		for(int j=0;j<a;j++)
			res+=a1[j];
		for(int j=0;j<b;j++)
			res+=a2[j];
		umax(ans,res);	
	}
	printf("%lld\n",ans);
	return 0;
}

Compilation message (stderr)

school.cpp: In function 'int main()':
school.cpp:29:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&a,&b);
                          ^
school.cpp:31:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&arr[i].ff,&arr[i].ss);
                                      ^

• Subtask 1: 0 / 100