Submission #647584

#	Time	Username	Problem	Language	Result	Execution time	Memory
647584		mychecksedad	Plus Minus (BOI17_plusminus)	C++17	12 / 100	1 ms	456 KiB

plusminus

/* Author : Mychecksdead */
#include<bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef long double ld;
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define PI 3.1415926535
#define pb push_back
#define setp() cout << setprecision(15)
#define all(x) x.begin(), x.end()
#define oset tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
#define debug(x) cerr << #x << " is " << x << '\n';
const int N = 1e6+100, M = 1e5+10, F = 2147483646, K = 20;


int n, m, k, x[5][5];
vector<int> v;
void solve(){
    cin >> n >> m >> k;
    for(int i = 0; i < n; ++i) for(int j = 0; j < m; ++j) x[i][j] = -1;
    for(int i = 0; i < k; ++i){
        char c; int a, b; cin >> c >> a >> b;
        a--, b--;
        if(c=='+') x[a][b] = 1;
        else x[a][b] = 0;
    }    
    for(int mask = 0; mask < (1<<n); ++mask){
        bool o = 1;
        for(int i = 0; i < n; ++i){
            if(x[i][0] != -1){
                if(((mask&(1<<i)) > 0) != x[i][0]){
                    o = 0;
                    break;
                }
            }
        }
        if(o) v.pb(mask);
    }
    for(int j = 1; j < m; ++j){
        vector<int> t;
        for(int mask = 0; mask < (1<<n); ++mask){
            bool o = 1;
            for(int i = 0; i < n; ++i){
                if(x[i][j] != -1){
                    if(((mask&(1<<i)) > 0) != x[i][j]){
                        o = 0;
                        break;
                    }
                }
            }
            if(!o) continue;
            for(int k: v){
                bool ok = 1;
                for(int i = 1; i < n; ++i){
                    int x = (mask&(1<<(i-1)))>0;
                    int y = (k&(1<<i))>0;
                    int z = (k&(1<<(i-1)))>0;
                    int w = (mask&(1<<i))>0;
                    if(x+y+z+w != 2){
                        ok = 0;
                        break;
                    }
                }
                if(ok){
                    t.pb(mask);
                }
            }
        }
        v = t;
    }
    cout << v.size();
}





int main(){
    cin.tie(0); ios::sync_with_stdio(0);
    int T = 1, aa;
    // cin >> T;aa=T;
    while(T--){
        // cout << "Case #" << aa-T << ": ";
        solve();
        cout << '\n';
    }
    return 0;
 
}

Compilation message (stderr)

plusminus.cpp: In function 'int main()':
plusminus.cpp:83:16: warning: unused variable 'aa' [-Wunused-variable]
   83 |     int T = 1, aa;
      |                ^~

• Subtask 1: 12 / 12
• Subtask 2: 0 / 42
• Subtask 3: 0 / 46