oj.uz

Submission #563318

# Submission time Handle Problem Language Result Execution time Memory
563318 2022-05-16T21:41:29 Z keta_tsimakuridze Raspad (COI17_raspad) C++11
100 / 100
 704 ms 117524 KB 
#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define f first
#define s second
#define endl "\n"
#define mp make_pair
const int N = 1e5 + 5, M = 54, mod = 1e9 + 7; //!
int t, ok[N][M],up[N][M], down[N][M]; 
pii p[N][M];
char c[N][M];
pii find(int x,int y) {
	return (p[x][y] == mp(x, y) ? p[x][y] : p[x][y] = find(p[x][y].f, p[x][y].s));
}
void merge(int x, int y, int i, int j) {
	pii p1 = find(x, y), p2 = find(i, j);
	p[p2.f][p2.s] = p1;
	ok[p1.f][p1.s] &= ok[p2.f][p2.s];
	up[p1.f][p1.s] = min(up[p1.f][p1.s], up[p2.f][p2.s]);
	down[p1.f][p1.s] = max(down[p1.f][p1.s], down[p2.f][p2.s]);
}
main() {
	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	int n, m;
	long long ans = 0;
	cin >> n >> m;
	for(int i = 1; i <= n; i++) {
		for(int j = 1; j <= m; j++) {
			cin >> c[i][j];
			if(c[i][j] == '1') ans += (long long)i * (n - i + 1);
		}
	}
	
	for(int i = 1; i <= n; i++) {
		for(int j = 1; j <= m; j++) {
			if(c[i][j] == '1') {
				if(c[i + 1][j] == '1') {
					ans -= (long long)i * (n - i);
				}
				if(c[i][j + 1] == '1') {
					ans -= (long long)i * (n - i + 1);
				}
			}
		}
	}
	for(int i = 0; i <= n + 1; i++) {
		for(int j = 0; j <= m + 1; j++) {
			p[i][j] = {i, j}, up[i][j] = down[i][j] = i;
			ok[i][j] = (i && j && (i < n + 1) && (j < m + 1));
		}
	}
	for(int i = 1; i <= n; i++) {
		for(int j = 1; j <= m; j++) {
			if(c[i][j] != '1' || c[i + 1][j] != '1') merge(i + 1, j, i + 1, j + 1); 
			if(c[i][j] != '1' || c[i][j + 1] != '1') merge(i, j + 1, i + 1, j + 1);
			if(c[i][j] != '1' || c[i - 1][j] != '1') merge(i, j, i, j + 1);
			if(c[i][j] != '1' || c[i][j - 1] != '1') merge(i, j, i + 1, j);
		}
	}
	for(int i = 1; i <= n; i++) {
		for(int j = 1; j <= m; j++) {
			if(find(i, j) == make_pair(i, j)) {
				if(ok[i][j]) {
					ans += (long long)(up[i][j] - 1) * (n - down[i][j] + 1); 
				}
			}
		}
	}
	cout << ans;
}

Compilation message

raspad.cpp:22:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   22 | main() {
      | ^~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 7 ms 1364 KB Output is correct
8 Correct 1 ms 836 KB Output is correct
9 Correct 7 ms 1492 KB Output is correct
10 Correct 5 ms 1364 KB Output is correct
11 Correct 7 ms 1492 KB Output is correct
12 Correct 5 ms 1236 KB Output is correct
13 Correct 6 ms 1408 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 56548 KB Output is correct
2 Correct 240 ms 112964 KB Output is correct
3 Correct 212 ms 113216 KB Output is correct
4 Correct 205 ms 101608 KB Output is correct
5 Correct 75 ms 34096 KB Output is correct
6 Correct 226 ms 113136 KB Output is correct
7 Correct 197 ms 112812 KB Output is correct
8 Correct 193 ms 90480 KB Output is correct

Subtask #4
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 7 ms 1364 KB Output is correct
8 Correct 1 ms 836 KB Output is correct
9 Correct 7 ms 1492 KB Output is correct
10 Correct 5 ms 1364 KB Output is correct
11 Correct 7 ms 1492 KB Output is correct
12 Correct 5 ms 1236 KB Output is correct
13 Correct 6 ms 1408 KB Output is correct
14 Correct 50 ms 56548 KB Output is correct
15 Correct 240 ms 112964 KB Output is correct
16 Correct 212 ms 113216 KB Output is correct
17 Correct 205 ms 101608 KB Output is correct
18 Correct 75 ms 34096 KB Output is correct
19 Correct 226 ms 113136 KB Output is correct
20 Correct 197 ms 112812 KB Output is correct
21 Correct 193 ms 90480 KB Output is correct
22 Correct 470 ms 93120 KB Output is correct
23 Correct 610 ms 116848 KB Output is correct
24 Correct 482 ms 116412 KB Output is correct
25 Correct 660 ms 117232 KB Output is correct
26 Correct 532 ms 116248 KB Output is correct
27 Correct 551 ms 116140 KB Output is correct
28 Correct 508 ms 116016 KB Output is correct
29 Correct 704 ms 117524 KB Output is correct
30 Correct 473 ms 116248 KB Output is correct
31 Correct 521 ms 116180 KB Output is correct
32 Correct 566 ms 116244 KB Output is correct
33 Correct 525 ms 104984 KB Output is correct
34 Correct 557 ms 105340 KB Output is correct