#include <bits/stdc++.h>
using namespace std;
const int mod = 1e9 + 7;
int add(int x, int y) { x += y; return (x >= mod ? x - mod : x); }
int mul(int x, int y) { return (x * 1LL * y) % mod; }
int sadd(int& x, int y) { x = add(x, y); }
int smul(int& x, int y) { x = mul(x, y); }
int pw(int a, int n) {
if(n == 0) return 1;
int x = pw(a, n / 2);
smul(x, x);
if(n % 2 == 1) smul(x, a);
return x;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
int n, m, k;
cin >> n >> m >> k;
vector<int> a[n + 1], b[m + 1];
vector<char> col(n + 1, '.'), row(m + 1, '.');
bool can_col = true, can_row = true;
for(int i = 0; i < k; i++) {
char c;
int x, y;
cin >> c >> x >> y;
a[x].push_back(y);
b[y].push_back(x);
char temp = col[x];
if(y % 2 == 1) col[x] = c;
else col[x] = (c ^ '+' ^ '-');
if(temp != '.' && temp != col[x]) can_col = false;
temp = row[y];
if(x % 2 == 1) row[y] = c;
else row[y] = (c ^ '+' ^ '-');
if(temp != '.' && temp != row[y]) can_row = false;
}
int ans = 0;
if(can_col) {
int cnt = 0;
for(int i = 1; i <= n; i++) cnt += (col[i] == '.');
sadd(ans, pw(2, cnt));
}
if(can_row) {
int cnt = 0;
for(int i = 1; i <= m; i++) cnt += (row[i] == '.');
sadd(ans, pw(2, cnt));
}
ans -= (can_col && can_row);
cout << ans;
return 0;
}
Compilation message
plusminus.cpp: In function 'int sadd(int&, int)':
plusminus.cpp:10:42: warning: no return statement in function returning non-void [-Wreturn-type]
10 | int sadd(int& x, int y) { x = add(x, y); }
| ^
plusminus.cpp: In function 'int smul(int&, int)':
plusminus.cpp:11:42: warning: no return statement in function returning non-void [-Wreturn-type]
11 | int smul(int& x, int y) { x = mul(x, y); }
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
604 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
604 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
604 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
