Submission #172426

#	Time	Username	Problem	Language	Result	Execution time	Memory
172426		rama_pang	Gap (APIO16_gap)	C++14	100 / 100	77 ms	3436 KiB

gap

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

lint findGap(int T, int N) {
    lint res = 0;

    if (T == 1) {
        vector<lint> X;
        lint l = 0, r = (lint) 1e18;

        for (int i = 0; i < (N + 1) / 2; i++) {
            lint mn, mx;
            MinMax(l, r, &mn, &mx);
            
            X.emplace_back(mn);
            X.emplace_back(mx);
            l = mn + 1;
            r = mx - 1;
        }

        sort(begin(X), end(X));
        for (int i = 0; i + 1 < X.size(); i++) {
            res = max(res, X[i + 1] - X[i]);
        }
    }
    
    if (T == 2) {
        lint low, high;
        MinMax(0, (lint) 1e18, &low, &high) ;   

        lint BLOCK = ((high - low - 1) / (N - 1)) + 1;

        vector<lint> X;
        X.emplace_back(low);
        for (lint i = low + 1; i < high; i += BLOCK + 1) {
            lint mn, mx;
            MinMax(i, min(i + BLOCK, high - 1), &mn, &mx);
            if (mn != -1 && mx != -1) {
                X.emplace_back(mn);
                X.emplace_back(mx);
            }
        }
        X.emplace_back(high);

        for (int i = 0; i + 1 < X.size(); i++) {
            res = max(res, X[i + 1] - X[i]);
        }
    }

    return res;
}

Compilation message (stderr)

gap.cpp: In function 'lint findGap(int, int)':
gap.cpp:24:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i + 1 < X.size(); i++) {
                         ~~~~~~^~~~~~~~~~
gap.cpp:47:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i + 1 < X.size(); i++) {
                         ~~~~~~^~~~~~~~~~

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