Sumthing ioitc 2013

general
,
1

Can someone please tell me what’s wrong with the following code?

#include
#include <stdio.h>
#include
#include

using namespace std;

signed int st(string a, signed int b) {
vector v;
int asize=int(a.size());
int bsize=int(to_string(b).size());

if(a==to_string(b)) {
    return 0;
}

else if((asize>bsize) && (b>0) && asize>1) {
    int j=1;
    while((j<=bsize) && a.substr(0,j).size()>0) {
        v.push_back( st( a.erase(0,j), b-stoi(a.substr(0,j))));
        j++;
    }
    
    int i=0;
    while((v.begin()+i) < v.end()) {
        if(v[i]== -1) {
            v.erase(v.begin()+i);
        }
        else {
            i++;
        }
    }
    
    if(v.size()>0) {
        return (*min_element(v.begin(), v.end()) +1);
    }
    else {
        return -1;
    }
}

else if((asize==bsize) && b>0 && asize>1) {
    v.push_back( st( a.erase(0,1), b-stoi(a.substr(0,1))));
    int i=0;
    while((v.begin()+i) < v.end()) {
        if(v[i]== -1) {
            v.erase(v.begin()+i);
        }
        else {
            i++;
        }
    }
    
    if(v.size()>0) {
        return (*min_element(v.begin(), v.end()) +1);
    }
    else {
        return -1;
    }
}

else {
    return -1;
}

}

int main() {
signed int a,b;
string c;
scanf("%d",&a);
cin>>c;
scanf("%d",&b);
signed int final=st(c,b);
cout<<final<<endl;
return 0;
}

(Sorry, the code is not documented :P)

2

@chittaranjan pls explainn ur alg…