Submission #668120

#	Time	Username	Problem	Language	Result	Execution time	Memory
668120		finn__	The Big Prize (IOI17_prize)	C++17	0 / 100	1483 ms	296 KiB

prize

#include <bits/stdc++.h>
#include "prize.h"
using namespace std;

int find_best(int n)
{
    int ans_max = 0;

    for (size_t i = 0; i * i < n; i++)
    {
        vector<int> ans = ask(i);
        ans_max = max(ans_max, ans[0] + ans[1]);

        if (!ans[0] && !ans[1])
            return i;
    }

    int i = -1, found = 0;

    while (1)
    {
        int a = i + 1, b = n - 1;
        while (a < b)
        {
            int mid = (a + b) / 2;
            vector<int> ans = ask(mid);

            if (!ans[0] && !ans[1])
                return mid;

            if (ans[0] + ans[1] == ans_max)
            {
                if (ans[0] == found)
                    a = mid + 1;
                else
                    b = mid;
            }
            else
                b = mid;
        }
        found++;
        i = a;
    }
}

Compilation message (stderr)

prize.cpp: In function 'int find_best(int)':
prize.cpp:9:30: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
    9 |     for (size_t i = 0; i * i < n; i++)
      |                        ~~~~~~^~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 80