AtCoder Beginner Contest 184

AtCoder Beginner Contest 184

A - Determinant

#include <bits/stdc++.h>
#define int ll
using namespace std;
typedef long long ll;
const int maxn=1e6+5;
const int mod=998244353;

void solve() {
    
    
    int a,b,c,d;
    cin>>a>>b>>c>>d;
    cout<<a*d-b*c;
}

signed main() {
    
    
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//    freopen("1.in","r",stdin);
    int _ = 1;
    //cin >> _;
    //init();
    while (_--) {
    
    
        solve();
    }
    return 0;
}

B - Quizzes

#include <bits/stdc++.h>
#define int ll
using namespace std;
typedef long long ll;
const int maxn=1e6+5;
const int mod=998244353;

void solve() {
    
    
    int n,x;
    cin>>n>>x;
    string s;
    cin>>s;
    for(int i=0;i<s.size();i++)
        if(s[i]=='o') x++;
        else x=max(0ll,x-1);
    cout<<x;
}

signed main() {
    
    
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//    freopen("1.in","r",stdin);
    int _ = 1;
    //cin >> _;
    //init();
    while (_--) {
    
    
        solve();
    }
    return 0;
}

C - Super Ryuma

#include <bits/stdc++.h>
//#define int ll
using namespace std;
typedef long long ll;
const int maxn=1e6+5;
const int mod=998244353;

void solve() {
    
    
    int a,b,c,d;
    int sum=0;
    cin>>a>>b>>c>>d;
    int x=abs(c-a);
    int y=abs(d-b);
    if(x==0&&y==0) {
    
    
        cout<<"0\n";
        return;
    }
    if(x==y||x+y<=3) {
    
    
        cout<<"1\n";
        return;
    }
    if(abs(x+y)%2==0||x+y<=6||abs(x-y)<=3) {
    
    
        cout<<"2\n";
        return;
    }
    cout<<"3\n";
}

signed main() {
    
    
    //ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//    freopen("1.in","r",stdin);
    int _ = 1;
    //cin >> _;
    //init();
    while (_--) {
    
    
        solve();
    }
    return 0;
}