제출 #649444

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
649444		birisi	XOR Sum (info1cup17_xorsum)	C++14	0 / 100	224 ms	340 KiB

xorsum

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

int say[5000];

int main() {

	int n;
	cin >> n;

	vector <int> v;

	int x;
	for (int i = 0; i < n; i++) {
		cin >> x;
		if (say[x] == 0)
			v.push_back(x);
		say[x]++;
	}

	long long int an = 0;
	vector <int> d;
	for (int i = 0; i < v.size(); i++) {
		x = v[i];
		if (say[x]%2 == 1){
			d.push_back(x);
		}
		if (say[x]%4 == 2)
			an = an^(2*x);
	}

	for (int i = 0; i < d.size(); i++) {
		for (int j = i; j < d.size(); j++) {
			an = an ^ (d[i] + d[j]);
		}
	}

	cout << an;

}

컴파일 시 표준 에러 (stderr) 메시지

xorsum.cpp: In function 'int main()':
xorsum.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for (int i = 0; i < v.size(); i++) {
      |                  ~~^~~~~~~~~~
xorsum.cpp:32:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for (int i = 0; i < d.size(); i++) {
      |                  ~~^~~~~~~~~~
xorsum.cpp:33:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   for (int j = i; j < d.size(); j++) {
      |                   ~~^~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 21
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23