제출 #403395

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
403395		shenxy	조개 줍기 (KOI17_shell)	C++11	12 / 100	246 ms	17792 KiB

shell

#include <cstdio>
#include <algorithm>
using namespace std;
int main() {
	int N;
	scanf("%d", &N);
	int A[N][N], S[N][N];
	for (int i = 0; i < N; ++i) {
		for (int j = 0; j < N; ++j) scanf("%d", &A[i][j]);
	}
	S[0][0] = A[0][0];
	for (int i = 1; i < N; ++i) S[i][0] = S[i - 1][0] + A[i][0], S[0][i] = S[0][i - 1] + A[0][i];
	for (int i = 1; i < N; ++i) {
		for (int j = 1; j < N; ++j) S[i][j] = max(S[i - 1][j], S[i][j - 1]) + A[i][j];
	}
	if (N <= 100) {
		int r, c, ans = 0;
		char op;
		for (int i = 0; i < N; ++i) {
			for (int j = 0; j < N; ++j) ans += S[i][j];
		}
		printf("%d\n", ans);
		for (int i = 0; i < N; ++i) {
			scanf(" %c %d %d", &op, &r, &c);
			if (op == 'U') ++A[r - 1][c - 1];
			else --A[r - 1][c - 1];
			S[0][0] = A[0][0];
			ans = 0;
			for (int i = 1; i < N; ++i) S[i][0] = S[i - 1][0] + A[i][0], S[0][i] = S[0][i - 1] + A[0][i];
			for (int i = 1; i < N; ++i) {
				for (int j = 1; j < N; ++j) S[i][j] = max(S[i - 1][j], S[i][j - 1]) + A[i][j];
			}
			for (int i = 0; i < N; ++i) {
				for (int j = 0; j < N; ++j) ans += S[i][j];
			}
			printf("%d\n", ans);
		}
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

shell.cpp: In function 'int main()':
shell.cpp:6:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |  scanf("%d", &N);
      |  ~~~~~^~~~~~~~~~
shell.cpp:9:36: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |   for (int j = 0; j < N; ++j) scanf("%d", &A[i][j]);
      |                               ~~~~~^~~~~~~~~~~~~~~~
shell.cpp:24:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |    scanf(" %c %d %d", &op, &r, &c);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 0 / 34
• Subtask 3: 0 / 54