Submission #167826

#	Time	Username	Problem	Language	Result	Execution time	Memory
167826		juggernaut	Divide and conquer (IZhO14_divide)	C++14	0 / 100	50 ms	1528 KiB

divide

#include<bits/stdc++.h>
#define int long long int
using namespace std;
struct data{
    int x,g,d;
};
data a[100001];
int n,i,l,r,x,g,mx,d,cnt=1;
main(){
    scanf("%lld",&n);
    cin>>a[1].x>>a[1].g>>a[1].d;
    for(i=2;i<=n;i++)
    {
        scanf("%lld%lld%lld",&x,&g,&d);
        if(a[cnt].x + a[cnt].d >= x){
            a[cnt].d+=d;
            a[cnt].g+=g;
        }
        else{
            cnt++;
            a[cnt].x=x;
            a[cnt].d=d;
            a[cnt].g=g;

        }
    }
    n=cnt;
    l=r=n;
    x=a[n].x;
    g=0;
    d=0;
    while(l>0){
        if(d+a[l].d>=a[r].x-a[l].x){

            d+=a[l].d;
            g+=a[l].g;
            mx=max(mx,g);
            l--;
        }else{
            g-=a[r].g;
            d-=a[r].d;
            r--;
            x=a[r].x;
        }
    }
    printf("%lld",mx);
}

Compilation message (stderr)

divide.cpp:9:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
divide.cpp: In function 'int main()':
divide.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ~~~~~^~~~~~~~~~~
divide.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld%lld%lld",&x,&g,&d);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 17
• Subtask 2: 0 / 31
• Subtask 3: 0 / 52