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Submission #548756

# Submission time Handle Problem Language Result Execution time Memory
548756 2022-04-14T11:28:28 Z usukhbaatar Lightning Rod (NOI18_lightningrod) C++14
0 / 100
 416 ms 264 KB 
#include <stack>
#include <cstdio>

using namespace std;

stack<pair<int, int>> s;

void fastscan(int &a) {
    a = 0;
    char c = getchar();
    for (; (c>47 && c<58); c=getchar())
        a = a *10 + c - 48;
}

int main() {
	int n, x, y;
	scanf("%d", &n);
	for (int i = 0; i < n; i++) {
		fastscan(x); fastscan(y);
		int l = x - y;
		int r = x + y;
		if (!s.empty()) {
			if (s.top().first <= l && r <= s.top().second)
				continue;
		}
		while (!s.empty() && l <= s.top().first && s.top().second <= r) s.pop();
		s.push({l, r});
	}
	printf("%d\n", s.size());
}

Compilation message

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:29:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::stack<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wformat=]
   29 |  printf("%d\n", s.size());
      |          ~^     ~~~~~~~~
      |           |           |
      |           int         std::stack<std::pair<int, int> >::size_type {aka long unsigned int}
      |          %ld
lightningrod.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 408 ms 264 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 416 ms 260 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 408 ms 264 KB Output isn't correct
2 Halted 0 ms 0 KB -