#include <iostream>#include <string>using namespace std;char unit[100005];int main(){ int m, t, u, f, d, i, ans = 0, sum = 0; cin >> m >> t >> u >> f >> d; for (i = 0; i < t; i++) cin >> unit[i]; for (i = 0; i < t; i++) { if (unit[i] == 'u') { sum += u + d; ans++; } else if (unit[i] == 'f') { sum += f + f; ans++; } else if (unit[i] == 'd') { sum += d + u; ans++; } if (sum >= m) { cout << ans-1 << endl; break; } }}
