Submission #857031

#	Time	Username	Problem	Language	Result	Execution time	Memory
857031		arashMLG	Plus Minus (BOI17_plusminus)	C++17	100 / 100	84 ms	10404 KiB

plusminus

#include<bits/stdc++.h>
#ifdef LOCAL
#include "Essentials/algo/debug.h"
#else
#define debug(...) 69
#endif
using namespace std;

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

//https://quera.org/profile/4dykhk

typedef long long     ll;
typedef long double   ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll>   pll;

const int N = 1e5 + 23;
const int sq = 450;
const ll mod = 1e9+7; // 998244353
const int LOG = 23;
const ll inf = 1e18;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

#define F           first
#define S           second
#define pb          push_back
#define ms(x,y)     memset((x) , (y) , sizeof (x))
#define done        return cout<<endl , 0;
#define kill(x)     cout<<x<<endl, exit(0);
#define isIn(x,s,e) ((x) >= (s) && (x) <= e)
#define all(x)      x.begin(),x.end()
#define sz(x)       (int)x.size()
#define pc(x)       __builtin_popcount(x)
#define ctz(x)      __builtin_ctz(x)
#define MinHeap(x)  priority_queue<x, vector<x> , greater<x> >
#define MaxHeap(x)  priority_queue<x, vector<x>>
#define lc          (v << 1)
#define rc          ((v<<1) |1)
#define int      ll

ll pw(ll a, ll b, ll md = mod){ll res = 1; while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}

int n,m,k;
pair<int,pii> a[N];
map<int,int> mp;
bool tc= true;

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(false);
	cin>>n>>m>>k;
	if(k == 0 ){
		cout<<( (pw(2,n) + pw(2,m))%mod -2 + mod) %mod;
		done;
	}
	for(int i = 0 ;i < k ; i++) {
		//debug(i);
		char c; cin>>c;
		a[i].F = (c == '+');
		cin>>a[i].S.F >> a[i].S.S;
	}
	int s1=0;
	for(int i = 0;i < k; i++) {
		//debug(i);
		auto [x,y] = a[i].S;
		int v = a[i].F;
		if(mp[x] == 0) {
			s1++;
			mp[x] = (v ^ (y&1)) + 1;
		} else if((mp[x]-1) != (v ^(y&1)) ) {
			s1 = -1;
			break;
		}
	}
	int ans1=0;
	debug(n,s1);
	if(s1 == -1) {
		tc = false;
	} else {
		ans1 = pw(2,n-s1);
	}
	mp.clear();
	
	int s2=0;
	for(int i = 0;i < k; i++) {
		//debug(i);
		auto [x,y] = a[i].S;
		int v = a[i].F;
		if(mp[y] == 0) {
			s2++;
			mp[y] = (v ^ (x&1)) + 1;
		} else if((mp[y]-1) != (v ^(x&1)) ) {
			s2 = -1;
			break;
		}
	}
	int ans2=0;
	debug(m,s2);
	if(s2 == -1) {
		tc = false;
	} else {
		ans2 = pw(2,m-s2);
	}
	debug(ans1,ans2);
	cout<<((ans1 + ans2) % mod-tc+mod) % mod;
    done;
}

Compilation message (stderr)

plusminus.cpp: In function 'int32_t main()':
plusminus.cpp:5:20: warning: statement has no effect [-Wunused-value]
    5 | #define debug(...) 69
      |                    ^~
plusminus.cpp:78:2: note: in expansion of macro 'debug'
   78 |  debug(n,s1);
      |  ^~~~~
plusminus.cpp:5:20: warning: statement has no effect [-Wunused-value]
    5 | #define debug(...) 69
      |                    ^~
plusminus.cpp:100:2: note: in expansion of macro 'debug'
  100 |  debug(m,s2);
      |  ^~~~~
plusminus.cpp:5:20: warning: statement has no effect [-Wunused-value]
    5 | #define debug(...) 69
      |                    ^~
plusminus.cpp:106:2: note: in expansion of macro 'debug'
  106 |  debug(ans1,ans2);
      |  ^~~~~

• Subtask 1: 12 / 12
• Subtask 2: 42 / 42
• Subtask 3: 46 / 46