結果
| 問題 |
No.424 立体迷路
|
| コンテスト | |
| ユーザー |
naoshi65536
|
| 提出日時 | 2016-09-22 23:28:01 |
| 言語 | C90 (gcc 12.3.0) |
| 結果 |
AC
|
| 実行時間 | 11 ms / 2,000 ms |
| コード長 | 1,485 bytes |
| コンパイル時間 | 288 ms |
| コンパイル使用メモリ | 22,272 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-11-17 15:11:53 |
| 合計ジャッジ時間 | 818 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 5 |
| other | AC * 21 |
コンパイルメッセージ
main.c:74:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
74 | main()
| ^~~~
main.c: In function ‘main’:
main.c:81:16: warning: implicit declaration of function ‘gets’; did you mean ‘fgets’? [-Wimplicit-function-declaration]
81 | while (gets(buf[n]) != NULL) {
| ^~~~
| fgets
main.c:81:29: warning: comparison between pointer and integer
81 | while (gets(buf[n]) != NULL) {
| ^~
main.c:78:9: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
78 | scanf("%d %d\n", &h, &w);
| ^~~~~~~~~~~~~~~~~~~~~~~~
main.c:79:9: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
79 | scanf("%d %d %d %d\n", &sx, &sy, &gx, &gy);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccVQjMTg.o: in function `main':
main.c:(.text.startup+0x6a): 警告: the `gets' function is dangerous and should not be used.
ソースコード
#include <stdio.h>
char buf[50][100];
char visit[50][100];
int solve(int x, int y, int gx, int gy)
{
int dx, dy;
if (visit[y][x]) {
return 0;
}
visit[y][x] = 1;
fprintf(stderr, "in %d %d %d %d\n", x, y, gx, gy);
if (x == gx && y == gy) {
fprintf(stderr, "OK\n");
return 1;
}
int base = buf[y][x];
fprintf(stderr, "baseptr=%s\n", buf[y]);
fprintf(stderr, "base = %c\n", base);
if (base == 0) {
fprintf(stderr, "fail\n");
return 0;
}
int dxdy[4][2] = {
{ -1, 0 },
{ 1, 0 },
{ 0, -1 },
{ 0, 1 },
};
for (int i = 0; i < 4; i++) {
dx = dxdy[i][0];
dy = dxdy[i][1];
int xx = x + dx;
int yy = y + dy;
if (xx < 0 || yy < 0 || xx >= 50 || yy >= 50) {
continue;
}
int c = buf[yy][xx];
if (c == base - 1 || c == base + 1 || c == base) {
if (solve(xx, yy, gx, gy)) {
fprintf(stderr, "solved\n");
return 1;
}
}
xx = x + dx * 2;
yy = y + dy * 2;
if (xx < 0 || yy < 0 || xx >= 50 || yy >= 50) {
continue;
}
int xx2 = x + dx;
int yy2 = y + dy;
c = buf[yy2][xx2];
if (c >= base) {
continue;
}
c = buf[yy][xx];
if (c == base) {
if (solve(xx, yy, gx, gy)) {
fprintf(stderr, "solved\n");
return 1;
}
}
}
return 0;
}
main()
{
int w, h, sx, sy, gx, gy;
scanf("%d %d\n", &h, &w);
scanf("%d %d %d %d\n", &sx, &sy, &gx, &gy);
int n = 0;
while (gets(buf[n]) != NULL) {
n++;
}
sx--;
sy--;
gx--;
gy--;
if (solve(sy, sx, gy, gx)) {
puts("YES");
} else {
puts("NO");
}
}
naoshi65536