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Submission #745072

# Submission time Handle Problem Language Result Execution time Memory
745072 2023-05-19T11:23:17 Z 박상훈(#9964) Event Hopping (BOI22_events) C++17
10 / 100
 1500 ms 3216 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
constexpr int INF = 1e9 + 100;
int n, S[100100], E[100100];

bool ok(int x, int y){
	return E[x] <= E[y];
}

void naive(int x, int y){
	if (!ok(x, y)){
		printf("impossible\n");
		return;
	}

	if (x==y){
		printf("0\n");
		return;
	}

	int l = S[y], r = E[y], ans = 1;
	while(true){
		if (l<=E[x] && E[x]<=r){
			printf("%d\n", ans);
			return;
		}

		int nl = INF;
		for (int i=1;i<=n;i++) if (l<=E[i] && E[i]<=r){
			nl = min(nl, S[i]);
		}
		if (l==nl) break;
		l = nl;
		ans++;
	}

	printf("impossible\n");
}

int main(){
	int q;
	scanf("%d %d", &n, &q);
	for (int i=1;i<=n;i++) scanf("%d %d", S+i, E+i);

	while(q--){
		int x, y;
		scanf("%d %d", &x, &y);
		naive(x, y);
	}
}

Compilation message

events.cpp: In function 'int main()':
events.cpp:44:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |  scanf("%d %d", &n, &q);
      |  ~~~~~^~~~~~~~~~~~~~~~~
events.cpp:45:30: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |  for (int i=1;i<=n;i++) scanf("%d %d", S+i, E+i);
      |                         ~~~~~^~~~~~~~~~~~~~~~~~~
events.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |   scanf("%d %d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 1572 ms 3132 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 187 ms 340 KB Output is correct
4 Correct 22 ms 348 KB Output is correct
5 Correct 39 ms 320 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 340 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 187 ms 340 KB Output is correct
4 Correct 22 ms 348 KB Output is correct
5 Correct 39 ms 320 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 312 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 187 ms 344 KB Output is correct
13 Correct 22 ms 340 KB Output is correct
14 Correct 38 ms 320 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 324 KB Output is correct
19 Execution timed out 1591 ms 592 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 187 ms 340 KB Output is correct
4 Correct 22 ms 348 KB Output is correct
5 Correct 39 ms 320 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 192 ms 336 KB Output is correct
13 Correct 23 ms 340 KB Output is correct
14 Correct 39 ms 212 KB Output is correct
15 Correct 1 ms 328 KB Output is correct
16 Correct 1 ms 320 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Execution timed out 1587 ms 2976 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1570 ms 3216 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 1572 ms 3132 KB Time limit exceeded
3 Halted 0 ms 0 KB -