關於USACO的初次嘗試

• 關於USACO的初次嘗試
  • Your Ride Is Here
  • PROGRAM NAME: ride
  • AC程式碼
  • Tips:

Your Ride Is Here

It is a well-known fact that behind every good comet is a UFO. These UFOs often come to collect loyal supporters from here on Earth. Unfortunately, they only have room to pick up one group of followers on each trip. They do, however, let the groups know ahead of time which will be picked up for each comet by a clever scheme: they pick a name for the comet which, along with the name of the group, can be used to determine if it is a particular group's turn to go (who do you think names the comets?). The details of the matching scheme are given below; your job is to write a program which takes the names of a group and a comet and then determines whether the group should go with the UFO behind that comet.

Both the name of the group and the name of the comet are converted into a number in the following manner: the final number is just the product of all the letters in the name, where "A" is 1 and "Z" is 26. For instance, the group "USACO" would be \(21 * 19 * 1 * 3 * 15 = 17955\). If the group's number mod \(47\)

Write a program which reads in the name of the comet and the name of the group and figures out whether according to the above scheme the names are a match, printing "GO" if they match and "STAY" if not. The names of the groups and the comets will be a string of capital letters with no spaces or punctuation, up to \(6\)

Examples:

PROGRAM NAME: ride

This means that you fill in your header with:
PROG: ride
WARNING: You must have 'ride' in this field or the wrong test data (or no test data) will be used.

先給出程式碼：

AC程式碼

/*
PROG:ride
LANG:C++11
*/
#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;
char str1[10001],str2[10001];

int judge(char a[]) {
    int len = strlen(a);
    int num = 1;
    for (int i=0;i<=len;i++) {
        int t = a[i]-'A'+1;
        num = (num*t)%47;
    }
    return num;
}

int main() {
    ofstream fout("ride.out");
    ifstream fin("ride.in");
    fin >> str1 >> str2;
    if (judge(str1)==judge(str2))
        fout << "GO" << endl;
    else 
        fout << "STAY" << endl;
    return 0;
}

Tips:

​ 1.

​ PROGRAM NAME: ride

​ This means that you fill in your header with:
​ PROG: ride
​ WARNING: You must have 'ride' in this field or the wrong test data (or no test data) will be used.

​ 你的程式開頭一定得加上這個，要不然機器不會使用正確的資料。

/*
PROG:ride
LANG:C++11
*/

​ 2.USACO用的是檔案輸入輸出的方式。