Submission #955408

#	Time	Username	Problem	Language	Result	Execution time	Memory
955408		guymmk	Coins (IOI17_coins)	C++14	0 / 100	6 ms	1696 KiB

coins

#include "bits/stdc++.h"
using  namespace std;
vector<int> coin_flips(vector<int> b, int c){
    int o=0;
    for(int i=0;i<b.size();i++){
        if(b[i])o^=i;
    }for(int i=0;i<b.size();i++){
        if(o^b[i]==c){
            vector<int>v={i};
            return v;
        }
    }
}int find_coin(vector<int> b){
    int o=0;
    for(int i=0;i<b.size();i++){
        if(b[i])o^=i;
    }return o;
}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:5:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 |     for(int i=0;i<b.size();i++){
      |                 ~^~~~~~~~~
coins.cpp:7:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     }for(int i=0;i<b.size();i++){
      |                  ~^~~~~~~~~
coins.cpp:8:18: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
    8 |         if(o^b[i]==c){
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(int i=0;i<b.size();i++){
      |                 ~^~~~~~~~~
coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:13:1: warning: control reaches end of non-void function [-Wreturn-type]
   13 | }int find_coin(vector<int> b){
      | ^

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