Submission #29871113

---

Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (n); ++i)

std::vector<std::string> split(const std::string& text, const char delim);

using ll = long long int;
using llu = unsigned long long int;

int main(){
    string buffer;
    getline(cin, buffer);
    const auto& split_item = split(buffer, ' ');
    const int A = stoi(split_item[0]);
    const int B = stoi(split_item[1]);
    const int C = stoi(split_item[2]);
    const int X = stoi(split_item[3]);

    if (X <= A) {
        printf("%.10f", 1.0);
        return 0;
    }

    if (B < X) {
        printf("%.10f", 0.0);
        return 0;
    }

    printf("%.10f", static_cast<double>(C) / (B - A));

    return 0;
}

std::vector<std::string> split(const std::string& text, const char delim) {
    std::vector<std::string> item_list;
    std::stringstream ss(text);
    std::string buffer;

    while ( std::getline(ss, buffer, delim) ) {
        if (!buffer.empty()) {
                item_list.emplace_back(buffer);
        }
    }

    return item_list;
}

Submission Info

Judge Result