Openjudge Exercise Solution (c + +)-title 4110: Santa Claus gift-santa Clau ' s Gifts

Problem:

Total time limit:

1000ms

Memory Limit:

65536kB

Describe

Christmas has come, in the city A in Santa Claus ready to distribute sweets, now has multiple boxes of different candies, each box of sweets has its own value and weight, each box of sweets can be split into any bulk combination to take away. Santa's reindeer can only bear a certain weight of candy, ask Santa Claus can take away much value of candy.

Input

The

first line consists of two parts, the number of candy box positive integer n (1 <= n <= 100), the maximum weight of the reindeer can withstand a positive integer w (0 < W < 10000), two numbers are separated by a space. The remaining n rows correspond to one box of candies per row, consisting of two parts, one for the value of a box of candies, a positive integer V and a weight positive integer w, separated by a space in the middle.

Output

output The maximum total value of candy that Santa Claus can take away, preserving 1 decimal places. The output is one line, ending with a newline character.

Sample input

4 15100 4412 8266 7591 2

Sample output

1193.0

Solution:

#include<stdio.h>#include<iostream>using namespaceStd;int Main(){intTimes;intWeight;intUsenu=0;DoubleAllvalue=0;intAllweight=0;Cin>>Times>>Weight;Usenu=Weight;struct MyGift{intValue;intWeit;DoublePerval;};struct MyGiftGift[Times];struct MyGiftTemp={0,0,0}; for(intI=0;I<Times;I++){Cin>>Gift[I].Value>>Gift[I].Weit;Gift[I].Perval=(Double)(Gift[I].Value)/(Double)(Gift[I].Weit);Allweight+=Gift[I].Weit;Allvalue+=Gift[I].Value; }   for(intJ=0;J<Times;J++) {  for(intH=1;H<Times;H++) { if(Gift[H-1].Perval<Gift[H].Perval) {Temp=Gift[H-1];Gift[H-1]=Gift[H];Gift[H]=Temp; } } }  if(Allweight<=Weight) { printf("%0.1f\ n",(Double)(Allvalue)); return 0; }Allvalue=0;   for(intZ=0;Z<Times;Z++) { if(Gift[Z].Weit<=Usenu) {Allvalue+=Gift[Z].Value;Usenu-=Gift[Z].Weit;     } Else{Allvalue+=Gift[Z].Perval*Usenu; printf("%0.1f\ n",Allvalue); return 0; } }return 0; } 

Openjudge Exercise Solution (c + +)-title 4110: Santa Claus gift-santa Clau ' s Gifts