oj.uz

답안 #614063

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
614063 2022-07-30T17:46:38 Z valerikk Sandcastle 2 (JOI22_ho_t5) C++17
100 / 100
 1552 ms 4808 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 50001;
const int M = 10000001;
const int dx[4] = {-1, 0, 1, 0};
const int dy[4] = {0, 1, 0, -1};

int h, w;

struct Table {
	int a[N];

	int *operator[](int i) {
		return a + i * w;
	}

	Table() { 
		memset(a, 0, sizeof a); 
	}
} a, b, c[4], d[4];

int rmin[N], rmax[N];
long long rsum[N], rsumup[N], rsumdown[N];
int rcnt[N], rcntup[N], rcntdown[N];

int get_delta(int x, int y, int z) {
	int mn = M;
	for (int i = 0; i < 4; ++i) {
		if ((z >> i) & 1) continue;
		int xx = x + dx[i], yy = y + dy[i];
		if (xx >= 0 && xx < h && yy >= 0 && yy < w && a[xx][yy] > a[x][y] && a[xx][yy] < mn) mn = a[xx][yy];
	}
	return mn == M ? 0 : mn - a[x][y];
}

int main() {
	scanf("%d%d", &h, &w);
	if (w > h) {
		swap(w, h);
		for (int x = 0; x < w; ++x) {
			for (int y = 0; y < h; ++y) {
				scanf("%d", &a[y][x]);
			}
		}
	} else {
		for (int x = 0; x < h; ++x) {
			for (int y = 0; y < w; ++y) {
				scanf("%d", &a[x][y]);
			}
		}
	}

	for (int x = 0; x < h; ++x) {
		for (int y = 0; y < w; ++y) {
			b[x][y] = get_delta(x, y, 0);
		}
	}
	for (int i = 0; i < 4; ++i) {
		for (int x = 0; x < h; ++x) {
			for (int y = 0; y < w; ++y) {
				c[i][x][y] = get_delta(x, y, 1 << i);
			}
		}
	}
	for (int i = 0; i < 4; ++i) {
		for (int x = 0; x < h; ++x) {
			for (int y = 0; y < w; ++y) {
				d[i][x][y] = get_delta(x, y, (1 << i) | (1 << ((i + 1) % 4)));
			}
		}
	}

	long long ans = h * w;

	for (int x = 0; x < h; ++x) {
		int len = 0;
		for (int y = 1; y < w; ++y) {
			++len;
			if (y == w - 1 || (a[x][y] < a[x][y + 1]) != (a[x][y - 1] < a[x][y])) {
				ans += 1ll * len * (len + 1) / 2;
				len = 0;
			}
		}
	}	
	for (int y = 0; y < w; ++y) {
		int len = 0;
		for (int x = 1; x < h; ++x) {
			++len;
			if (x == h - 1 || (a[x][y] < a[x + 1][y]) != (a[x - 1][y] < a[x][y])) {
				ans += 1ll * len * (len + 1) / 2;
				len = 0;
			}
		}
	}

	for (int y1 = 0; y1 < w; ++y1) {
		for (int x = 0; x < h; ++x) {
			rmin[x] = rmax[x] = a[x][y1];
		}
		for (int x = 0; x < h; ++x) {
			rcntup[x] = d[3][x][y1] == 0;
			rsumup[x] = d[3][x][y1];
			rcntdown[x] = d[2][x][y1] == 0;
			rsumdown[x] = d[2][x][y1];
			rcnt[x] = c[3][x][y1] == 0;
			rsum[x] = c[3][x][y1];	
		}
		for (int y2 = y1 + 1; y2 < w; ++y2) {
			for (int x = 0; x < h; ++x) {
				rmin[x] = min(rmin[x], a[x][y2]);
				rmax[x] = max(rmax[x], a[x][y2]);
				if (y2 - 1 != y1) {
					rcntup[x] += c[0][x][y2 - 1] == 0;
					rsumup[x] += c[0][x][y2 - 1];
					rcntdown[x] += c[2][x][y2 - 1] == 0;
					rsumdown[x] += c[2][x][y2 - 1];	
					rcnt[x] += b[x][y2 - 1] == 0;
					rsum[x] += b[x][y2 - 1];
				}
			}
			for (int x = 0; x < h; ++x) {
				rcntup[x] += d[0][x][y2] == 0;
				rsumup[x] += d[0][x][y2];
				rcntdown[x] += d[1][x][y2] == 0;
				rsumdown[x] += d[1][x][y2];
				rcnt[x] += c[1][x][y2] == 0;
				rsum[x] += c[1][x][y2];
			}
			for (int x1 = 0; x1 < h; ++x1) {
				long long sum = rsumup[x1];
				int cnt = rcntup[x1];
				int cmin = rmin[x1], cmax = rmax[x1];
				for (int x2 = x1 + 1; x2 < h; ++x2) {
					cmin = min(cmin, rmin[x2]);
					cmax = max(cmax, rmax[x2]);
					ans += sum + rsumdown[x2] == cmax - cmin && cnt + rcntdown[x2] == 1;
					cnt += rcnt[x2];
					sum += rsum[x2];
					if (cnt >= 2 || sum >= M) break;
				}
			}
			for (int x = 0; x < h; ++x) {
				rcntup[x] -= d[0][x][y2] == 0;
				rsumup[x] -= d[0][x][y2];
				rcntdown[x] -= d[1][x][y2] == 0;
				rsumdown[x] -= d[1][x][y2];
				rcnt[x] -= c[1][x][y2] == 0;
				rsum[x] -= c[1][x][y2];
			}
		}
	}
	
	printf("%lld\n", ans);

	return 0;	
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |  scanf("%d%d", &h, &w);
      |  ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:44:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     scanf("%d", &a[y][x]);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:50:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |     scanf("%d", &a[x][y]);
      |     ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2260 KB Output is correct
2 Correct 12 ms 4308 KB Output is correct
3 Correct 12 ms 4692 KB Output is correct
4 Correct 12 ms 4684 KB Output is correct
5 Correct 12 ms 4684 KB Output is correct
6 Correct 14 ms 4808 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2260 KB Output is correct
2 Correct 1 ms 2260 KB Output is correct
3 Correct 1 ms 2260 KB Output is correct
4 Correct 1 ms 2260 KB Output is correct
5 Correct 1 ms 2260 KB Output is correct
6 Correct 2 ms 2260 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2260 KB Output is correct
2 Correct 1 ms 2260 KB Output is correct
3 Correct 1 ms 2260 KB Output is correct
4 Correct 1 ms 2260 KB Output is correct
5 Correct 1 ms 2260 KB Output is correct
6 Correct 2 ms 2260 KB Output is correct
7 Correct 2 ms 2260 KB Output is correct
8 Correct 2 ms 2260 KB Output is correct
9 Correct 2 ms 2260 KB Output is correct
10 Correct 3 ms 2260 KB Output is correct
11 Correct 3 ms 2260 KB Output is correct
12 Correct 2 ms 2260 KB Output is correct
13 Correct 3 ms 2260 KB Output is correct
14 Correct 2 ms 2260 KB Output is correct
15 Correct 2 ms 2260 KB Output is correct
16 Correct 3 ms 2276 KB Output is correct

Subtask #4
56.0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2260 KB Output is correct
2 Correct 1 ms 2260 KB Output is correct
3 Correct 1 ms 2260 KB Output is correct
4 Correct 1 ms 2260 KB Output is correct
5 Correct 1 ms 2260 KB Output is correct
6 Correct 2 ms 2260 KB Output is correct
7 Correct 2 ms 2260 KB Output is correct
8 Correct 2 ms 2260 KB Output is correct
9 Correct 2 ms 2260 KB Output is correct
10 Correct 3 ms 2260 KB Output is correct
11 Correct 3 ms 2260 KB Output is correct
12 Correct 2 ms 2260 KB Output is correct
13 Correct 3 ms 2260 KB Output is correct
14 Correct 2 ms 2260 KB Output is correct
15 Correct 2 ms 2260 KB Output is correct
16 Correct 3 ms 2276 KB Output is correct
17 Correct 3 ms 2516 KB Output is correct
18 Correct 6 ms 2260 KB Output is correct
19 Correct 4 ms 2260 KB Output is correct
20 Correct 36 ms 2292 KB Output is correct
21 Correct 37 ms 2276 KB Output is correct
22 Correct 26 ms 2296 KB Output is correct
23 Correct 25 ms 2260 KB Output is correct
24 Correct 8 ms 2292 KB Output is correct
25 Correct 8 ms 2268 KB Output is correct
26 Correct 9 ms 2292 KB Output is correct
27 Correct 8 ms 2296 KB Output is correct
28 Correct 8 ms 2260 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2260 KB Output is correct
2 Correct 1 ms 2260 KB Output is correct
3 Correct 1 ms 2260 KB Output is correct
4 Correct 1 ms 2260 KB Output is correct
5 Correct 1 ms 2260 KB Output is correct
6 Correct 2 ms 2260 KB Output is correct
7 Correct 2 ms 2260 KB Output is correct
8 Correct 2 ms 2260 KB Output is correct
9 Correct 2 ms 2260 KB Output is correct
10 Correct 3 ms 2260 KB Output is correct
11 Correct 3 ms 2260 KB Output is correct
12 Correct 2 ms 2260 KB Output is correct
13 Correct 3 ms 2260 KB Output is correct
14 Correct 2 ms 2260 KB Output is correct
15 Correct 2 ms 2260 KB Output is correct
16 Correct 3 ms 2276 KB Output is correct
17 Correct 3 ms 2516 KB Output is correct
18 Correct 6 ms 2260 KB Output is correct
19 Correct 4 ms 2260 KB Output is correct
20 Correct 36 ms 2292 KB Output is correct
21 Correct 37 ms 2276 KB Output is correct
22 Correct 26 ms 2296 KB Output is correct
23 Correct 25 ms 2260 KB Output is correct
24 Correct 8 ms 2292 KB Output is correct
25 Correct 8 ms 2268 KB Output is correct
26 Correct 9 ms 2292 KB Output is correct
27 Correct 8 ms 2296 KB Output is correct
28 Correct 8 ms 2260 KB Output is correct
29 Correct 12 ms 4308 KB Output is correct
30 Correct 41 ms 2316 KB Output is correct
31 Correct 104 ms 2280 KB Output is correct
32 Correct 765 ms 3344 KB Output is correct
33 Correct 1552 ms 2668 KB Output is correct
34 Correct 1190 ms 2672 KB Output is correct
35 Correct 59 ms 2516 KB Output is correct
36 Correct 99 ms 2636 KB Output is correct
37 Correct 114 ms 2604 KB Output is correct
38 Correct 121 ms 2516 KB Output is correct
39 Correct 132 ms 2608 KB Output is correct
40 Correct 125 ms 2620 KB Output is correct
41 Correct 106 ms 2624 KB Output is correct
42 Correct 122 ms 2624 KB Output is correct
43 Correct 109 ms 2624 KB Output is correct
44 Correct 110 ms 2608 KB Output is correct