oj.uz

Submission #204710

# Submission time Handle Problem Language Result Execution time Memory
204710 2020-02-26T18:27:15 Z luciocf Simple game (IZhO17_game) C++14
100 / 100
 100 ms 6904 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e6+10;

int n, m;
int a[maxn];

int bit[maxn];

void upd(int x, int v)
{
	for (; x < maxn; x += (x&-x))
		bit[x] += v;
}

int soma(int x)
{
	int ans = 0;
	for (; x > 0; x -= (x&-x))
		ans += bit[x];
	return ans;
}

void range_upd(int l, int r, int x)
{
	upd(l, x);
	upd(r+1, -x);
}

int main(void)
{
	scanf("%d %d", &n, &m);

	for (int i = 1; i <= n; i++)
		scanf("%d", &a[i]);

	for (int i = 1; i < n; i++)
	{
		if (a[i] <= a[i+1])
			range_upd(a[i], a[i+1]-1, 1);
		else
			range_upd(a[i+1]+1, a[i], 1);
	}

	for (int i = 1; i <= m; i++)
	{
		int op;
		scanf("%d", &op);

		if (op == 1)
		{
			int pos, v;
			scanf("%d %d", &pos, &v);

			if (pos != 1)
			{
				if (a[pos-1] <= a[pos])
					range_upd(a[pos-1], a[pos]-1, -1);
				else
					range_upd(a[pos]+1, a[pos-1], -1);

				if (a[pos-1] <= v)
					range_upd(a[pos-1], v-1, 1);
				else
					range_upd(v+1, a[pos-1], 1);
			}

			if (pos != n)
			{
				if (a[pos] <= a[pos+1])
					range_upd(a[pos], a[pos+1]-1, -1);
				else
					range_upd(a[pos+1]+1, a[pos], -1);

				if (v <= a[pos+1])
					range_upd(v, a[pos+1]-1, 1);
				else
					range_upd(a[pos+1]+1, v, 1);
			}

			a[pos] = v;
		}
		else
		{
			int H;
			scanf("%d", &H);

			printf("%d\n", (H == a[n] ? soma(H)+1 : soma(H)));
		}
	}
}

Compilation message

game.cpp: In function 'int main()':
game.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
game.cpp:37:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~
game.cpp:50:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &op);
   ~~~~~^~~~~~~~~~~
game.cpp:55:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d", &pos, &v);
    ~~~~~^~~~~~~~~~~~~~~~~~~
game.cpp:88:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &H);
    ~~~~~^~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 7 ms 3960 KB Output is correct
3 Correct 7 ms 3960 KB Output is correct
4 Correct 8 ms 3836 KB Output is correct
5 Correct 7 ms 3832 KB Output is correct
6 Correct 7 ms 3960 KB Output is correct
7 Correct 6 ms 376 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 7 ms 3960 KB Output is correct
3 Correct 7 ms 3960 KB Output is correct
4 Correct 8 ms 3836 KB Output is correct
5 Correct 7 ms 3832 KB Output is correct
6 Correct 7 ms 3960 KB Output is correct
7 Correct 6 ms 376 KB Output is correct
8 Correct 58 ms 1784 KB Output is correct
9 Correct 77 ms 6904 KB Output is correct
10 Correct 80 ms 6904 KB Output is correct
11 Correct 58 ms 1656 KB Output is correct
12 Correct 66 ms 2912 KB Output is correct
13 Correct 65 ms 2808 KB Output is correct

Subtask #3
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 7 ms 3960 KB Output is correct
3 Correct 7 ms 3960 KB Output is correct
4 Correct 8 ms 3836 KB Output is correct
5 Correct 7 ms 3832 KB Output is correct
6 Correct 7 ms 3960 KB Output is correct
7 Correct 6 ms 376 KB Output is correct
8 Correct 58 ms 1784 KB Output is correct
9 Correct 77 ms 6904 KB Output is correct
10 Correct 80 ms 6904 KB Output is correct
11 Correct 58 ms 1656 KB Output is correct
12 Correct 66 ms 2912 KB Output is correct
13 Correct 65 ms 2808 KB Output is correct
14 Correct 93 ms 6904 KB Output is correct
15 Correct 95 ms 6904 KB Output is correct
16 Correct 92 ms 6796 KB Output is correct
17 Correct 95 ms 6904 KB Output is correct
18 Correct 100 ms 6904 KB Output is correct