Submission #535489

#	Time	Username	Problem	Language	Result	Execution time	Memory
535489		byunjaewoo	Gap (APIO16_gap)	C++17	30 / 100	54 ms	2848 KiB

gap

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
#include "gap.h"

ll findGap(int T, int N) {
    if(T==1) {
        ll res=0, s=-1, e=(ll)1e18+1;
        vector<ll> V;
        for(int i=1; i<=(N+1)/2; i++) {
            MinMax(s+1, e-1, &s, &e);
            V.push_back(s);
            if(s!=e) V.push_back(e);
        }
        sort(V.begin(), V.end());
        for(int i=0; i<V.size()-1; i++) res=max(res, V[i+1]-V[i]);
        return res;
    }
    ll s, e, res=0;
    MinMax(0, (ll)1e18, &s, &e);
    res=e-s;
    s++, e--;
    vector<ll> a, b;
    for(ll i=1; i<=N+1; i++) {
        ll l=s+((e-s+1)*(i-1)/N), r=min(e, s+((e-s+1)*i/N)-1);
        if(l>r) continue;
        ll x, y;
        MinMax(l, r, &x, &y);
        if(x!=-1) {
            a.push_back(x);
            b.push_back(y);
        }
    }
    if(a.size()) res=max(a[0]-s+1, e-b.back()+1);
    for(int i=0; i<a.size()-1; i++) res=max(res, a[i+1]-b[i]);
    return res;
}

Compilation message (stderr)

gap.cpp: In function 'll findGap(int, int)':
gap.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         for(int i=0; i<V.size()-1; i++) res=max(res, V[i+1]-V[i]);
      |                      ~^~~~~~~~~~~
gap.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     for(int i=0; i<a.size()-1; i++) res=max(res, a[i+1]-b[i]);
      |                  ~^~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 70