Submission #1368165

#	Time	Username	Problem	Language	Result	Execution time	Memory
1368165		mikasa	Hack (APIO25_hack)	C++20	100 / 100	1 ms	344 KiB

hack

#include "hack.h"
#include <vector>
using namespace std;

long long m = 0; 

int hack(){

    volatile int* bss = (volatile int*)&m;
    const int RADI = 200;
    vector<int> snap(RADI*2);

    for (int i=-RADI;i<RADI;++i) {
        snap[i+RADI]=bss[i];
    }

    collisions({1});
    volatile int* ptr=nullptr;
    for (int i=-RADI;i<RADI;++i) {
        if (bss[i]==snap[i+RADI]+1){
            ptr=&bss[i];
            break;
        }
    }
    if (ptr!=nullptr) {
        *ptr=0;
        int n = *(ptr-1);
        if (n<=0) {
            n=*(ptr+1);
        }

        return n;
    }
}

Compilation message (stderr)

hack.cpp: In function 'int hack()':
hack.cpp:34:1: warning: control reaches end of non-void function [-Wreturn-type]
   34 | }
      | ^

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 17 / 17
• Subtask 3: 75 / 75