Submission #1053322

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053322		Unforgettablepl	The Big Prize (IOI17_prize)	C++17	20 / 100	43 ms	432 KiB

prize

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

const int THRESHOLD_JUMP = 480;
const int BIGGER_JUMP = 131072;

int find_best(int n){
    int moves = 0;
    int worst_case = 0;
    for(int i=0;i<480;i++) {
        auto curr = ask(i);
        int c = curr[0]+curr[1];
        if(c==0)return i;
        worst_case = max(worst_case,c);
    }
    for(int i=480;i<n;i++) {
        auto base = ask(i);
        int curr = base[0]+base[1];
        if(curr==0)return i;
        if(curr==worst_case) {
            for(int jump=BIGGER_JUMP;jump;jump/=2) {
                if(i+jump>=n)continue;
                auto temp = ask(i+jump);
                if(temp==base)i+=jump;
            }
        } else {
            int curradded = 0;
            for(int jump=256;jump;jump/=2) {
                if(i+jump>=n)continue;
                if(curradded+jump>THRESHOLD_JUMP)continue;
                auto temp = ask(i+jump);
                if(temp==base){
                    i+=jump;
                    curradded+=jump;
                }
            }
        }
    }
}

Compilation message (stderr)

prize.cpp: In function 'int find_best(int)':
prize.cpp:9:9: warning: unused variable 'moves' [-Wunused-variable]
    9 |     int moves = 0;
      |         ^~~~~
prize.cpp:40:1: warning: control reaches end of non-void function [-Wreturn-type]
   40 | }
      | ^

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