Submission #782062

#	Time	Username	Problem	Language	Result	Execution time	Memory
782062		Dan4Life	Coins (IOI17_coins)	C++17	100 / 100	8 ms	1400 KiB

coins

#include <vector>
using v=std::vector<int>;
v coin_flips(v b, int c){int x=0;for(int i=0;i<64;i++)c^=b[i]*i;return{c};}
int find_coin(v a) {int x=0;for(int i=0;i<64;i++)x^=a[i]*i;return x;}

Compilation message (stderr)

coins.cpp: In function 'v coin_flips(v, int)':
coins.cpp:3:30: warning: unused variable 'x' [-Wunused-variable]
    3 | v coin_flips(v b, int c){int x=0;for(int i=0;i<64;i++)c^=b[i]*i;return{c};}
      |                              ^

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