제출 #471727

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
471727		rainboy	Automobil (COCI17_automobil)	C11	100 / 100	18 ms	8120 KiB

automobil

#include <stdio.h>

#define N	1000000
#define M	1000000
#define MD	1000000007

int main() {
	static int aa[N], bb[M];
	int n, m, k, i, j, a, b, c, d;

	scanf("%d%d%d", &n, &m, &k);
	for (i = 0; i < n; i++)
		aa[i] = 1;
	for (j = 0; j < m; j++)
		bb[j] = 1;
	while (k--) {
		static char s[2];
		int x;

		scanf("%s", s);
		if (s[0] == 'R') {
			scanf("%d%d", &i, &x), i--;
			aa[i] = (long long) aa[i] * x % MD;
		} else {
			scanf("%d%d", &j, &x), j--;
			bb[j] = (long long) bb[j] * x % MD;
		}
	}
	/* (i m + j + 1) aa[i] bb[j] = (i aa[i] bb[j]) m + (j bb[j] aa[i]) + aa[i] bb[j] */
	a = 0, c = 0;
	for (i = 0; i < n; i++)
		a = (a + aa[i]) % MD, c = (c + (long long) aa[i] * i) % MD;
	b = 0, d = 0;
	for (j = 0; j < m; j++)
		b = (b + bb[j]) % MD, d = (d + (long long) bb[j] * j) % MD;
	printf("%lld\n", ((long long) b * c % MD * m % MD + (long long) a * d % MD + (long long) a * b % MD) % MD);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

automobil.c: In function 'main':
automobil.c:11:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  scanf("%d%d%d", &n, &m, &k);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
automobil.c:20:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |   scanf("%s", s);
      |   ^~~~~~~~~~~~~~
automobil.c:22:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |    scanf("%d%d", &i, &x), i--;
      |    ^~~~~~~~~~~~~~~~~~~~~
automobil.c:25:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |    scanf("%d%d", &j, &x), j--;
      |    ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100