Submission #895282

#	Time	Username	Problem	Language	Result	Execution time	Memory
895282		rainboy	XCorr (KOI18_XCorr)	C11	100 / 100	87 ms	13648 KiB

XCorr

#include <stdio.h>

#define N	300000
#define M	300000

int main() {
	static int ii[N], xx[N], jj[M], yy[M];
	int n, m, a, b, i, j, jl, jr, y;
	long long ans;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d%d", &ii[i], &xx[i]);
	scanf("%d", &m);
	for (j = 0; j < m; j++)
		scanf("%d%d", &jj[j], &yy[j]);
	scanf("%d%d", &a, &b);
	y = 0, ans = 0;
	for (i = 0, jl = 0, jr = 0; i < n; i++) {
		while (jr < m && jj[jr] <= ii[i] + b)
			y += yy[jr++];
		while (jl < m && jj[jl] < ii[i] + a)
			y -= yy[jl++];
		ans += (long long) xx[i] * y;
	}
	printf("%lld\n", ans);
	return 0;
}

Compilation message (stderr)

XCorr.c: In function 'main':
XCorr.c:11:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
XCorr.c:13:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |   scanf("%d%d", &ii[i], &xx[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
XCorr.c:14:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  scanf("%d", &m);
      |  ^~~~~~~~~~~~~~~
XCorr.c:16:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |   scanf("%d%d", &jj[j], &yy[j]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
XCorr.c:17:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |  scanf("%d%d", &a, &b);
      |  ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 42 / 42
• Subtask 3: 39 / 39