Submission #128705

#	Time	Username	Problem	Language	Result	Execution time	Memory
128705		dndhk	Olympiads (BOI19_olympiads)	C++14	0 / 100	463 ms	548 KiB

olympiads

#include <bits/stdc++.h>

#define pb push_back
#define all(v) ((v).begin(), (v).end())
#define sortv(v) sort(all(v))
#define sz(v) ((int)(v).size())
#define uniqv(v) (v).erase(unique(all(v)), (v).end())
#define umax(a, b) (a)=max((a), (b))
#define umin(a, b) (a)=min((a), (b))
#define FOR(i,a,b) for(int i = (a); i <= (b); i++)
#define rep(i,n) FOR(i,1,n)
#define rep0(i,n) FOR(i,0,(int)(n)-1)
#define FI first
#define SE second
#define INF 2000000000
#define INFLL 1000000000000000000LL


using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

int N, K, C;
deque<vector<int> > vt;

int sidx;
bool sf(vector<int> a, vector<int> b){
	return a[sidx]>b[sidx];
}

priority_queue<int, vector<int>, greater<int> > pq;

void sortvt(int x){
	sidx = x;
	sort(vt.begin(), vt.end(), sf);
}

vector<vector<int> > st;

bool calc(int x){
	vector<vector<int> > vt2;
	if(x==K){
		int sum = 0;
		int pl = 0;
		for(int i=0; i<K; i++){
			pl = 0;
			for(int j=0; j<K; j++){
				pl = max(pl, st[j][i]);
				//cout<<st[i][j]<<" ";
			}//cout<<endl;
			sum+=pl;
		}
		if(pq.size()==C){
			if(sum<pq.top()){
				return false;
			}
			pq.pop(); pq.push(sum);
		}
		else	pq.push(sum);
		//cout<<sum<<endl;
		return true;
	}
	while(!vt.empty()){
		sortvt(x);
		st.push_back(vt.front());
		vt2.push_back(vt.front());
		vt.pop_front();
		if(!calc(x+1)){
			while(!vt2.empty()){
				vt.push_front(vt2.back()); vt2.pop_back();
			}
			return false;
		}
		st.pop_back();
	}
	while(!vt2.empty()){
		vt.push_front(vt2.back()); vt2.pop_back();
	}
	return true;
}

int main(){
	scanf("%d%d%d", &N, &K, &C);
	for(int i=0; i<N; i++){
		vector<int> v(K);
		for(int j=0; j<K; j++){
			int x; scanf("%d", &x);
			v[j] = x;
		}
		vt.pb(v);
	}
	calc(0);
	printf("%d", pq.top());
	return 0;
}

Compilation message (stderr)

olympiads.cpp: In function 'bool calc(int)':
olympiads.cpp:54:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(pq.size()==C){
      ~~~~~~~~~^~~
olympiads.cpp: In function 'int main()':
olympiads.cpp:84:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &N, &K, &C);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
olympiads.cpp:88:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    int x; scanf("%d", &x);
           ~~~~~^~~~~~~~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 31
• Subtask 3: 0 / 24
• Subtask 4: 0 / 32