Submission #1042160

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042160		Minbaev	Divide and conquer (IZhO14_divide)	C++17	100 / 100	21 ms	8028 KiB

divide

#include<bits/stdc++.h>
#define int long long int
using namespace std;
struct dta{
    int x,g,d;
};
dta a[100001];
int n,i,drive[100001],gold[100001],vec[100001],res,l,r,m;
main(){
    scanf("%lld",&n);
    for(i=1;i<=n;i++){
        scanf("%lld%lld%lld",&a[i].x,&a[i].g,&a[i].d);
        gold[i]=gold[i-1]+a[i].g;
        drive[i]=drive[i-1]+a[i].d;
        vec[i]=drive[i]-a[i].x;
    }
    for(i=n-1;i>0;i--)vec[i]=max(vec[i],vec[i+1]);
    for(i=1;i<=n;i++){
        l=i;
        r=n;
        while(l<r){
            m=(l+r+1)>>1;
            if(vec[m]>=drive[i-1]-a[i].x)l=m;
            else r=m-1;
        }
        res=max(res,gold[r]-gold[i-1]);
    }
    printf("%lld",res);
}

Compilation message (stderr)

divide.cpp:9:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    9 | 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]
   10 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
divide.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         scanf("%lld%lld%lld",&a[i].x,&a[i].g,&a[i].d);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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