Submission #117469

#	Time	Username	Problem	Language	Result	Execution time	Memory
117469		tjd229	산악 구조대 (JOI13_mountain)	C++14	0 / 100	13 ms	1000 KiB

mountain

#include "grader.h"
#include <vector>
#define pii pair<int,int>
using namespace std;
vector<pii > g[401];
int md(int r1,int c1,int r2,int c2) {
	int dr = r1 - r2;
	int dc = c1 - c2;
	if (dr < 0) dr = -dr;
	if (dc < 0) dc = -dc;
	return dr + dc;
}
void Rescue(int R, int C, int RS, int CS, int X) {
	int i, j;
	int l = 0, r = 0;
	int lb = 0, ub = 0;
	for (i = 1; i <= R; ++i) {
		for (j = 1; j <= C; ++j) {
			int d = md(RS, CS, i, j);
			if (r < d) r = d;
			g[d].push_back({i,j});
		}
	}
	while (l <= r) {
		int m = (l + r) >> 1;
		int RM = g[m][0].first;
		int CM = g[m][0].second;
		int h = Measure(RM,CM);
		if (h == X) {
			Pinpoint(RM,CM);
			return;
		}
		else if (h > X) lb = m, l = m + 1;
		else ub = m, r = m - 1;
	}
	
	for (i = 0; i < g[l].size(); ++i) {
		int RM = g[l][i].first;
		int CM = g[l][i].second;
		if (Measure(RM, CM) == X) {
			Pinpoint(RM, CM);
			return;
		}
	}
	for (i = 0; i < g[r].size(); ++i) {
		int RM = g[r][i].first;
		int CM = g[r][i].second;
		if (Measure(RM, CM) == X) {
			Pinpoint(RM, CM);
			return;
		}
	}

}

Compilation message (stderr)

mountain.cpp: In function 'void Rescue(int, int, int, int, int)':
mountain.cpp:37:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i = 0; i < g[l].size(); ++i) {
              ~~^~~~~~~~~~~~~
mountain.cpp:45:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i = 0; i < g[r].size(); ++i) {
              ~~^~~~~~~~~~~~~
mountain.cpp:16:6: warning: variable 'lb' set but not used [-Wunused-but-set-variable]
  int lb = 0, ub = 0;
      ^~
mountain.cpp:16:14: warning: variable 'ub' set but not used [-Wunused-but-set-variable]
  int lb = 0, ub = 0;
              ^~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 80