oj.uz

Submission #730054

# Submission time Handle Problem Language Result Execution time Memory
730054 2023-04-25T07:57:50 Z lovrot Olympiads (BOI19_olympiads) C++17
100 / 100
 76 ms 4648 KB 
#include <cstdio> 
#include <queue> 

#define pb push_back

using namespace std; 

typedef pair<int, int> pii; 

const int N = 500; 
const int K = 6; 

int n, k, event[N][K]; 

//perm; -1 => ban | 0 => whatever | 1 => must
struct space {
	char perm[N], cnt;
	int best[K], score;
	space() {
		for(int i = 0; i < N; i++) perm[i] = 0; 
		for(int i = 0; i < K; i++) best[i] = -1; 
		cnt = score = 0;
	}
	void evaluate() { 
		for(int i = 0; i < n; i++) 
			if(perm[i] == 1) {
				best[cnt] = i;
				cnt++; 
			}
		for(int i = cnt; i < k; i++) {
			best[i] = -1;
			for(int j = 0; j < n; j++) {
				bool flag = true;
				for(int l = 0; l < i; l++) flag &= j != best[l]; 
				if(flag && perm[j] == 0 && (best[i] == -1 || event[best[i]][i] < event[j][i]))
					best[i] = j; 
			}
		}
		for(int i = 0; i < k; i++) {
			//printf("/ best %d\n", best[i]);
			int xam = 0; 
			for(int j = 0; j < k; j++) xam = max(xam, event[best[j]][i]); 
			score += xam; 
		}
		//printf("/ score %d\n", score); 
	}
	bool operator< (space s) const { 
		return score < s.score; 
	}  
};

priority_queue<space> q;

void debug(const space &s) {
	for(int i = 0; i < n; i++) printf("%d ", s.perm[i]); 
	printf("\n");
	for(int i = 0; i < k; i++) printf("%d ", s.best[i]);
	printf("\n%d %d\n", s.score, s.cnt);
}

void fracture(space &s) {
	for(int i = 0; i < s.cnt; i++) s.perm[s.best[i]] = 1; 
	for(int i = s.cnt; i < k; i++) {
		s.perm[s.best[i]] = -1;
		space _s = space();
		for(int j = 0; j < n; j++) _s.perm[j] = s.perm[j]; 
		_s.evaluate(); 
		if(_s.best[k - 1] != -1) {
			q.push(_s); 
			//debug(_s);
		}
		s.perm[s.best[i]] = 1;
	}
} 

int t;

int main() {
	scanf("%d%d%d", &n, &k, &t);
	for(int i = 0; i < n; i++)
		for(int j = 0; j < k; j++) 
			scanf("%d", &event[i][j]);
			
	space s = space(); 
	s.evaluate(); 
	q.push(s);
		
	int cnt = 0;  
	while(1) {
		cnt++; 
		space _s = q.top();
		q.pop(); 
		//debug(s);
		if(cnt == t) {
			printf("%d\n", _s.score); 
			break;
		}
		fracture(_s); 
	}
	return 0; 
}

Compilation message

olympiads.cpp: In member function 'void space::evaluate()':
olympiads.cpp:27:10: warning: array subscript has type 'char' [-Wchar-subscripts]
   27 |     best[cnt] = i;
      |          ^~~
olympiads.cpp: In function 'int main()':
olympiads.cpp:79:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |  scanf("%d%d%d", &n, &k, &t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
olympiads.cpp:82:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |    scanf("%d", &event[i][j]);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 300 KB Output is correct
2 Correct 6 ms 364 KB Output is correct
3 Correct 7 ms 384 KB Output is correct
4 Correct 4 ms 296 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 1440 KB Output is correct
2 Correct 4 ms 676 KB Output is correct
3 Correct 9 ms 2596 KB Output is correct
4 Correct 6 ms 1420 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 340 KB Output is correct
2 Correct 7 ms 292 KB Output is correct
3 Correct 37 ms 2440 KB Output is correct
4 Correct 40 ms 2508 KB Output is correct
5 Correct 15 ms 924 KB Output is correct
6 Correct 5 ms 1420 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 300 KB Output is correct
2 Correct 6 ms 364 KB Output is correct
3 Correct 7 ms 384 KB Output is correct
4 Correct 4 ms 296 KB Output is correct
5 Correct 7 ms 1440 KB Output is correct
6 Correct 4 ms 676 KB Output is correct
7 Correct 9 ms 2596 KB Output is correct
8 Correct 6 ms 1420 KB Output is correct
9 Correct 8 ms 340 KB Output is correct
10 Correct 7 ms 292 KB Output is correct
11 Correct 37 ms 2440 KB Output is correct
12 Correct 40 ms 2508 KB Output is correct
13 Correct 15 ms 924 KB Output is correct
14 Correct 5 ms 1420 KB Output is correct
15 Correct 12 ms 968 KB Output is correct
16 Correct 28 ms 2524 KB Output is correct
17 Correct 76 ms 4648 KB Output is correct
18 Correct 27 ms 1524 KB Output is correct
19 Correct 7 ms 356 KB Output is correct