Submission #48425

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
48425	2018-05-13 02:52:00	wzy	Building Bridges (CEOI17_building)	C++11	100 / 100	149 ms	9164 KiB

building

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#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
long long w[100005] , h[100005];
long long n;
long long dp[100005];
struct line{
    int x , y;
    line(int x , int y){
        this->x = x , this->y = y;
    }
};
bool operator <(line a , line b){
    if(a.x == b.x) return a.y > b.y;
    else return a.x > b.x;
}
template <class type> 
class CHT{
    public : 
    bool cmp(type a , type b , type c){
        return ((double)((double) (c.y) - (a.y)) * ((double) (a.x) - (b.x))   <= ((double) ((double) (a.x) - (c.x)) * ((double) (b.y) - (a.y)) ) )  ; 
    }
    int sizex(){
        return cht.size();
    }
    void addLINE(type a){
            while(cht.size() >= 2 && cmp(cht[cht.size() - 2] , cht[cht.size() - 1] , a)){
                cht.pop_back();
 
 
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Compilation message (stderr)

building.cpp: In instantiation of 'void CHT<type>::mergev(std::vector<_Tp>) [with type = line]':
building.cpp:79:21:   required from here
building.cpp:40:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 0 ; i < nhcht.size() + cht.size() ; i++) newcht.pb(line(0,0));
building.cpp:43:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 0 ; i < newcht.size() ; i++) addLINE(newcht[i]);
building.cpp: In instantiation of 'long long int CHT<type>::querymin(long long int) [with type = line]':
building.cpp:95:56:   required from here
building.cpp:61:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(ansj < cht.size()) bestvalue = min(bestvalue , eval(cht[ansj] , x));
building.cpp: In function 'int32_t main()':
building.cpp:102:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld" , &n);
     ~~~~~^~~~~~~~~~~~~
building.cpp:105:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld" , &h[i]);
         ~~~~~^~~~~~~~~~~~~~~~
building.cpp:109:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld" , &w[i]);
         ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40