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Submission #829191

# Submission time Handle Problem Language Result Execution time Memory
829191 2023-08-18T06:13:12 Z Darren0724 Plus Minus (BOI17_plusminus) C++17
100 / 100
 146 ms 14924 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int mod=1e9+7;
map<int,int> fi,row;
int pw(int a,int b){
    int ans=1;
    while(b){
        if(b&1){
            ans=ans*a%mod;
        }
        a=a*a%mod;
        b>>=1;
    }
    return ans;
}
int32_t main(){
    int n,m;cin>>n>>m;
    int q;cin>>q;
    int ans1=0;
    int ans2=0;
    set<int> s;
    for(int i=0;i<q;i++){
        char c;cin>>c;
        int p=(c=='+');
        int a,b;cin>>a>>b;
        if(a%2==0){
            if(!fi.count(b)){
                fi[b]=p^1;
            }
            else if(fi[b]!=(p^1)){
                ans1=-1;
            }
        }
        else{
            if(!fi.count(b)){
                fi[b]=p;
            }
            else if(fi[b]!=p){
                ans1=-1;
            }
        }
        if(!row.count(a)){
            row[a]=(b+p)%2;
        }
        else if(row[a]!=(b+p)%2){ 
            ans2=-1;
        }
        s.insert((a+b+p)%2);
    }
    int m1=m-fi.size();
    int m2=n-row.size();
    if(ans1==-1){
        ans1=0;
    }
    else{
        ans1=pw(2,m1);
    }
    if(ans2==-1){
        ans2=0;
    }
    else{
        ans2=pw(2,m2);
    }
    int ans3=s.size()==1;
    if(q==0){
        ans3=2;
    }
    //cout<<ans1<<' '<<ans2<<' '<<ans3<<endl;
    cout<<(ans1+ans2-ans3+mod)%mod<<endl;

    return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 264 KB Output is correct
8 Correct 1 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #2
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 264 KB Output is correct
8 Correct 1 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 296 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 58 ms 1356 KB Output is correct
17 Correct 57 ms 1252 KB Output is correct
18 Correct 57 ms 1292 KB Output is correct
19 Correct 55 ms 1348 KB Output is correct
20 Correct 56 ms 1288 KB Output is correct

Subtask #3
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 264 KB Output is correct
8 Correct 1 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 296 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 58 ms 1356 KB Output is correct
17 Correct 57 ms 1252 KB Output is correct
18 Correct 57 ms 1292 KB Output is correct
19 Correct 55 ms 1348 KB Output is correct
20 Correct 56 ms 1288 KB Output is correct
21 Correct 123 ms 9044 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 107 ms 9128 KB Output is correct
24 Correct 107 ms 9036 KB Output is correct
25 Correct 108 ms 9016 KB Output is correct
26 Correct 115 ms 12436 KB Output is correct
27 Correct 121 ms 12440 KB Output is correct
28 Correct 134 ms 12516 KB Output is correct
29 Correct 119 ms 12512 KB Output is correct
30 Correct 146 ms 14924 KB Output is correct