[백준 1173번] 운동

소스코드

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#include <iostream>
using namespace std;
 
int main() {
    int N, m, M, T, R;
    cin >> N >> m >> M >> T >> R;
    int cur = m, dest = 0, cnt = 0;
    bool flag = false;
    while (1) {
        if (dest == N){ break; }
        if (cur + T <= M) {
            cur += T, dest++, cnt++, flag=false; continue;
        }
        if (cur - R >= m) {
            cur -= R, cnt++, flag = false; continue;
        }
        if (cur - R < m) {
            cur = m, cnt++;
            if (flag) { cnt = -1; break; }
            flag = true;
        }
    }
    cout << cnt << '\n';
    return 0;
}