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- #include <iostream>
- #include <cmath>
- using namespace std;
- int main(){
- int a, b;
- cin >> a >> b;
- char arr[a+b+1];
- for(int i=0; i<=a+b; i++)
- cin >> arr[i];
- bool flag1, flag2;
- if(arr[a]==45)flag1=1;
- for(int i=0; i<=a+b; i++){
- if(i==a)flag2=1;
- else if(arr[i]>=48&&arr[i]<=57)flag2=1;
- }
- if(flag1&&flag2)cout << "Yes";
- else cout << "No";
- return 0;
- }
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