Submission #103520

#	Time	Username	Problem	Language	Result	Execution time	Memory
103520		tincamatei	Coin Collecting (JOI19_ho_t4)	C++14	0 / 100	2 ms	384 KiB

joi2019_ho_t4

#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 100000;
int x[2*MAX_N], y[2*MAX_N];

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, lo, hi;
	long long rez = 0LL;
	fscanf(fin, "%d", &n);
	
	lo = hi = 0;

	for(int i = 0; i < 2 * n; ++i) {
		fscanf(fin, "%d%d", &x[i], &y[i]);
		if(y[i] <= 1) {
			rez = rez + 1 - y[i];
			lo++;
		} else {
			rez = rez + y[i] - 2;
			hi++;
		}
	}
	
	rez = rez + abs(lo - hi) / 2;
	
	sort(x, x + 2 * n);
	for(int i = 0; i < 2 * n; ++i)
		rez = rez + abs(x[i] - (i / 2 + 1));
	
	fprintf(fout, "%lld", rez);

	fclose(fin);
	fclose(fout);
	return 0;
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:19:8: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fscanf(fin, "%d", &n);
  ~~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:24:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   fscanf(fin, "%d%d", &x[i], &y[i]);
   ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63