oj.uz

Submission #124806

# Submission time Handle Problem Language Result Execution time Memory
124806 2019-07-04T02:22:26 Z model_code Plus Minus (BOI17_plusminus) C++17
100 / 100
 214 ms 9720 KB 
#include<cstdio>
#include<iostream>
#include<map>

using namespace std;

char flipsign(char c, int p) {
	if(p%2==0) return c;
	return c=='+' ? '-' : '+';
}

long long pow2(int x) {
	if(x==0) return 1;
	long long a = pow2(x/2);
	a = ((a*a) * (x%2==1 ? 2 : 1)) % 1000000007;
	return a;
}

int main() {
	int n,m,k,x,y;
	scanf("%d%d%d",&n,&m,&k);
	map<int, char> H,V;
	bool canBeH = true, canBeV = true, canBePlusEvenMinusOdd = true, canBePlusOddMinusEven = true;
	
	for(int i = 0; i < k; ++i) {
		char c;
		scanf(" %c%d%d", &c, &y, &x);

		canBeH &= ((int)H[y] == 0) || H[y] == flipsign(c,x);
		canBeV &= ((int)V[x] == 0) || V[x] == flipsign(c,y);
		
		H[y] = flipsign(c,x);
		V[x] = flipsign(c,y);
	
		canBePlusEvenMinusOdd &= (c=='+' && (x+y)%2==0) || (c=='-' && (x+y)%2==1);
		canBePlusOddMinusEven &= (c=='+' && (x+y)%2==1) || (c=='-' && (x+y)%2==0);
	}
	
	long long ans = canBeH ? pow2(n-H.size()) : 0;
	ans += canBeV ? pow2(m-V.size()): 0;
	ans -= canBeH && canBeV && canBePlusEvenMinusOdd ? 1 : 0;
	ans -= canBeH && canBeV && canBePlusOddMinusEven ? 1 : 0;
	ans = ans % 1000000007;
	
	printf ("%lld\n", ans);
	
	return 0;
}

Compilation message

plusminus.cpp: In function 'int main()':
plusminus.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&m,&k);
  ~~~~~^~~~~~~~~~~~~~~~~~~
plusminus.cpp:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %c%d%d", &c, &y, &x);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct

Subtask #2
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 79 ms 448 KB Output is correct
17 Correct 79 ms 448 KB Output is correct
18 Correct 79 ms 376 KB Output is correct
19 Correct 79 ms 508 KB Output is correct
20 Correct 78 ms 504 KB Output is correct

Subtask #3
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 79 ms 448 KB Output is correct
17 Correct 79 ms 448 KB Output is correct
18 Correct 79 ms 376 KB Output is correct
19 Correct 79 ms 508 KB Output is correct
20 Correct 78 ms 504 KB Output is correct
21 Correct 162 ms 5920 KB Output is correct
22 Correct 2 ms 256 KB Output is correct
23 Correct 165 ms 6008 KB Output is correct
24 Correct 158 ms 6008 KB Output is correct
25 Correct 170 ms 5920 KB Output is correct
26 Correct 170 ms 8184 KB Output is correct
27 Correct 170 ms 8244 KB Output is correct
28 Correct 168 ms 8184 KB Output is correct
29 Correct 161 ms 8320 KB Output is correct
30 Correct 214 ms 9720 KB Output is correct