oj.uz

Submission #90969

# Submission time Handle Problem Language Result Execution time Memory
90969 2018-12-25T10:39:30 Z tincamatei Circle selection (APIO18_circle_selection) C++14
12 / 100
 1411 ms 52044 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 300000;
int xc[1+MAX_N], yc[1+MAX_N], rc[1+MAX_N];
int poz[1+MAX_N], rez[1+MAX_N];
long long ld[1+MAX_N], rd[1+MAX_N];

set<pair<long long, int>> sl, sr;

bool cmp(int a, int b) {
	return rc[a] > rc[b] || (rc[a] == rc[b] && a < b);
}

double dist(int xa, int ya, int xb, int yb) {
	return sqrt((long long)(xa - xb) * (xa - xb) +
	            (long long)(ya - yb) * (ya - yb));
}

int main() {
#ifdef HOME
	FILE *fin = fopen("input.in", "r");
	FILE *fout = fopen("output.out", "w");
#else
	FILE *fin = stdin;
	FILE *fout = stdout;
#endif

	int n, ox, oy, mnx, mny;

	mnx = mny = 1000000000;

	fscanf(fin, "%d", &n);
	
	for(int i = 1; i <= n; ++i) {
		fscanf(fin, "%d%d%d", &xc[i], &yc[i], &rc[i]);
		mnx = min(mnx, xc[i]);
		mny = min(mny, yc[i]);
	}
	
	ox = oy = -2000000000;	

	for(int i = 1; i <= n; ++i) {
		xc[i] -= mnx;
		yc[i] -= mny;

		long long d = llabs(ox - xc[i]) + llabs(oy - yc[i]);

		ld[i] = d - rc[i];
		rd[i] = d + rc[i];
		
		sl.insert(make_pair(ld[i], i));
		sr.insert(make_pair(rd[i], i));
		poz[i - 1] = i;
	}

	sort(poz, poz + n, cmp);

	for(int i = 0; i < n; ++i) {
		int x = poz[i];
		
		if(rez[x] == 0) {
			set<pair<long long, int> >::iterator it;

			it = sl.lower_bound(make_pair(ld[x], -1));
		
			while(it != sl.end() && it->first <= rd[x]) {
				int todel = it->second;
					
				if((long long)(rc[x] + rc[todel]) * (rc[x] + rc[todel]) >= 
				   (long long)(xc[x] - xc[todel]) * (xc[x] - xc[todel]) +
				   (long long)(yc[x] - yc[todel]) * (yc[x] - yc[todel])) {
					rez[todel] = x;
	
					sr.erase(make_pair(rd[todel], todel));
					it = sl.erase(it);
				} else
					it++;
			}
	
			it = sr.lower_bound(make_pair(ld[x], -1));
			while(it != sr.end() && it->first <= rd[x]) {
				int todel = it->second;
				if((long long)(rc[x] + rc[todel]) * (rc[x] + rc[todel]) >= 
				   (long long)(xc[x] - xc[todel]) * (xc[x] - xc[todel]) +
				   (long long)(yc[x] - yc[todel]) * (yc[x] - yc[todel])) {
					rez[todel] = x;
	
					sl.erase(make_pair(ld[todel], todel));
					it = sr.erase(it);
				} else
					it++;
			}
		}
	}
	
	for(int i = 1; i <= n; ++i)
		fprintf(fout, "%d ", rez[i]);

#ifdef HOME
	fclose(fin);
	fclose(fout);
#endif
	return 0;
}

Compilation message

circle_selection.cpp: In function 'int main()':
circle_selection.cpp:34:8: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fscanf(fin, "%d", &n);
  ~~~~~~^~~~~~~~~~~~~~~
circle_selection.cpp:37:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   fscanf(fin, "%d%d%d", &xc[i], &yc[i], &rc[i]);
   ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 528 KB Output is correct
4 Correct 2 ms 528 KB Output is correct
5 Correct 2 ms 528 KB Output is correct
6 Correct 2 ms 528 KB Output is correct
7 Correct 2 ms 528 KB Output is correct
8 Incorrect 2 ms 580 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1266 ms 51204 KB Output is correct
2 Correct 1218 ms 51248 KB Output is correct
3 Correct 1386 ms 51720 KB Output is correct
4 Correct 1411 ms 52044 KB Output is correct
5 Correct 1105 ms 52044 KB Output is correct
6 Correct 1247 ms 52044 KB Output is correct
7 Correct 1112 ms 52044 KB Output is correct
8 Correct 1012 ms 52044 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 52044 KB Output is correct
2 Incorrect 475 ms 52044 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 1319 ms 52044 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 528 KB Output is correct
4 Correct 2 ms 528 KB Output is correct
5 Correct 2 ms 528 KB Output is correct
6 Correct 2 ms 528 KB Output is correct
7 Correct 2 ms 528 KB Output is correct
8 Incorrect 2 ms 580 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 528 KB Output is correct
4 Correct 2 ms 528 KB Output is correct
5 Correct 2 ms 528 KB Output is correct
6 Correct 2 ms 528 KB Output is correct
7 Correct 2 ms 528 KB Output is correct
8 Incorrect 2 ms 580 KB Output isn't correct
9 Halted 0 ms 0 KB -