How can i solve ioi 2013 practice task problems specially citizen task
How can i solve ioi 2013 practice task problems specially citizen task
№ | Пользователь | Рейтинг |
---|---|---|
1 | tourist | 3690 |
2 | jiangly | 3647 |
3 | Benq | 3581 |
4 | orzdevinwang | 3570 |
5 | Geothermal | 3569 |
5 | cnnfls_csy | 3569 |
7 | Radewoosh | 3509 |
8 | ecnerwala | 3486 |
9 | jqdai0815 | 3474 |
10 | gyh20 | 3447 |
Страны | Города | Организации | Всё → |
№ | Пользователь | Вклад |
---|---|---|
1 | maomao90 | 174 |
2 | awoo | 165 |
3 | adamant | 161 |
4 | TheScrasse | 160 |
5 | nor | 158 |
6 | maroonrk | 156 |
7 | -is-this-fft- | 152 |
8 | orz | 146 |
9 | SecondThread | 145 |
9 | pajenegod | 145 |
Название |
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I have a solution to the citicen task, but unfortunately I can't proof it.
My Algorithm is: sort due to a special rule and than go threw the sorted array and take all elements, which are possible in attention to the previously taken ones. (i.e. Q < min(taken P))
To compare two countries on smaller, you use the following function.
P1 < Q2 && P2 > Q1 -> country 1 is not smaller
P2 < Q1 && P1 > Q2 -> country 1 is smaller
P1 > Q2 && P2 > Q1 -> country 1 is smaller if: Q1 > Q2
else country 1 is smaller if: P1 > P2
Can anyone proof this... (due to tests with more than 1 Million of test data i think it is correct)
can you publish your source code
Please proof or disproof it — I had this problem, when i had to explain my solution in the training programm for the IOI.
struct T {
};
int countries(int N, int *pP, int *pQ)
{
}