Submission #340690

#	Time	Username	Problem	Language	Result	Execution time	Memory
340690		Kerim	Divide and conquer (IZhO14_divide)	C++17	100 / 100	116 ms	16492 KiB

divide

#include "bits/stdc++.h"
#define MAXN 200009
#define INF 1000000000000007
#define ll long long
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
using namespace std;
ll F[MAXN],e[MAXN],g[MAXN],ans,res;
int x[MAXN],n,c;
map<ll,int>pm;
void upd(int x,ll val){for(;x<MAXN;x+=x&(-x))F[x]=min(F[x],val);	}
ll tap(int x){for(res=INF;x;x-=x&(-x))res=min(res,F[x]);return res;}	
int main(){
    for(int i=0;i<MAXN;i++)F[i]=INF;
    scanf("%d",&n);
    for(int i=1;i<=n;i++){
    	scanf("%d%lld%lld",x+i,g+i,e+i);
    	g[i]+=g[i-1];e[i]+=e[i-1];
    	pm[e[i-1]-x[i]]=pm[e[i]-x[i]]=1;
    }tr(it,pm)it->second=++c;
    for(int i=1;i<=n;i++){
    	upd(pm[e[i-1]-x[i]],g[i-1]);
		ans=max(ans,g[i]-tap(pm[e[i]-x[i]]));	
    }printf("%lld\n",ans);
	return 0;
}

Compilation message (stderr)

divide.cpp: In function 'int main()':
divide.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   14 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
divide.cpp:16:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |      scanf("%d%lld%lld",x+i,g+i,e+i);
      |      ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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