Submission #61230

#	Time	Username	Problem	Language	Result	Execution time	Memory
61230		istlemin	Gap (APIO16_gap)	C++14	60 / 100	86 ms	3044 KiB

gap

#include "gap.h"
#include<bits/stdc++.h>

using namespace std;

#define rep(i,a,b) for(int i = a; i<int(b);++i)
#define all(v) v.begin(),v.end()
#define sz(v) v.size()
#define trav(a,c) for(auto a: c)

typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll,ll> pii;

void ask(ll l,ll r, ll *mn,ll *mx){
    ll ansMn,ansMx;
    MinMax(l,r-1,&ansMn,&ansMx);
    (*mn) = ansMn;
	(*mx) = ansMx;
}

long long findGap(int T, int N) {
    ll t = T;
    ll n = N;

    if(t==1){
        vi a;
        ll l = -1;
        ll r = 2e18;
        while(true){
            ll mn,mx;
            if(a.size()==n) break;
            ask(l,r,&mn,&mx);
            l = mn+1;
            r = mx;
			a.push_back(mn);
			if(mn==mx) break;
			a.push_back(mx);
        }
        sort(all(a));
        ll mxGap = 0;
        rep(i,0,n-1) mxGap = max(mxGap,a[i+1]-a[i]);
        return mxGap;
    } else {
        ll dn,up;
        ask(-1,2e18,&dn,&up);
        up++;

        vi a;

        vi endPoints;
        endPoints.push_back(dn);

        ll numGroups = n/2+10;

        rep(i,0,numGroups){
            if(i<(up-dn)%numGroups)
				endPoints.push_back(endPoints[endPoints.size()-1]+(up-dn)/numGroups+1);
			else
				endPoints.push_back(endPoints[endPoints.size()-1]+(up-dn)/numGroups);
        }

        rep(i,0,numGroups){
            ll l = endPoints[i];
            ll r = endPoints[i+1];
            ll mn,mx;
            ask(l,r,&mn,&mx);
            if(mn==-1) continue;
            a.push_back(mn);
            a.push_back(mx);
        }

        sort(all(a));
        ll mxGap = 0;
        rep(i,0,a.size()-1) mxGap = max(mxGap,a[i+1]-a[i]);
        //cout<<"yes"<<endl;
        return mxGap;

    }

	return 0;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:32:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if(a.size()==n) break;
                ~~~~~~~~^~~

• Subtask 1: 30 / 30
• Subtask 2: 30 / 70