Submission #578527

#	Time	Username	Problem	Language	Result	Execution time	Memory
578527		zaneyu	Coins (IOI17_coins)	C++14	0 / 100	3 ms	980 KiB

coins

#include "coins.h"
#define REP(i,n) for(int i=0;i<n;i++)
std::vector<int> coin_flips(std::vector<int> b, int c) {
    REP(i,64){
        if(b[i]) c^=i;
    }
    b[c]^=1;
}

int find_coin(std::vector<int> b) {
    int a=0;
    REP(i,64) if(b[i]) a^=i;
    return a;
}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:8:1: warning: no return statement in function returning non-void [-Wreturn-type]
    8 | }
      | ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 50