Submission #167822

#	Time	Username	Problem	Language	Result	Execution time	Memory
167822		juggernaut	Divide and conquer (IZhO14_divide)	C++14	17 / 100	51 ms	3196 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;
main(){
    scanf("%lld",&n);
    for(i=1;i<=n;i++)scanf("%lld%lld%lld",&a[i].x,&a[i].g,&a[i].d);
    l=r=1;
    x=a[1].x;
    g=a[1].g;
    d=a[1].d;
    while(r<=n&&l<=n){
        if(r<n&&d+a[r+1].d>=a[r+1].x-x){
            r++;
            d+=a[r].d;
            g+=a[r].g;
            mx=max(mx,g);
        }else{
            g-=a[l].g;
            d-=a[l].d;
            l++;
            x=a[l].x;
        }
    }
    l=r=n;
    x=a[n].x;
    g=a[n].g;
    d=a[n].d;
    while(r>0&&l>0){
        if(l>0&&d+a[l-1].d>=x-a[l-1].x){
            l--;
            d+=a[l].d;
            g+=a[l].g;
            mx=max(mx,g);
        }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:11:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=1;i<=n;i++)scanf("%lld%lld%lld",&a[i].x,&a[i].g,&a[i].d);
                      ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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