【優秀數學題】HDU 1302——The Snail

來源：點擊開啟連結

這個題目也不是很複雜。一隻蝸牛，白天上升一些，晚上下滑一些，每天會因為沒有力氣而比上一天少爬，求這個蝸牛幾天滑到底或者幾天滑到頂。簡單類比即可，如果用數學反而麻煩。另外當這個蝸牛上升比下降還快的時候，其實就已經不行了=  =#

#include <iostream>#include <string>using namespace std;int main(){double high,up,down,factor;while(cin>>high>>up>>down>>factor){bool succ=0,fail=0;int needday=1;double nowpos=0;double rate=up*(factor/100.0);if(high==0)break;while(nowpos<=high && nowpos>=0){if(up>0)nowpos+=up;if(nowpos>high){succ=1;break;}nowpos-=down;up-=rate;if(nowpos<0){fail=1;break;}needday++;}if(fail==1){cout<<"failure on day "<<needday<<endl;}else if(succ==1){cout<<"success on day "<<needday<<endl;}}return 0;}