Submission #1625003

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Source Code Expand

#include <iostream>
#include <algorithm>
#include <array>
#include <math.h>
#include <set>
#include <stdlib.h>
#include <string>
#include <vector>

#define INT_MAX 2000000000
#define MOD 1000000007
#define ll long long
#define rep(i,a,b) for(i = (a); i < (b); i++)
#define bitget(a,b) (((a) >> (b)) & 1)

using namespace std;

int i, j, k;

int main() {
	int n;
	cin >> n;
	int a[100000], b[100000];
	rep(i, 0, n)
		cin >> a[i] >> b[i];
	int c[100002] = {};
	rep(i, 0, n) {
		c[a[i]]++;
		c[b[i] + 1]--;
	}
	int m = c[0];
	rep(i, 1, 1000002) {
		c[i] += c[i - 1];
		if (c[i] > m) {
			m = c[i];
		}
	}
	cout << m << endl;
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:33:19: warning: iteration 100001u invokes undefined behavior [-Waggressive-loop-optimizations]
   c[i] += c[i - 1];
                   ^
./Main.cpp:13:35: note: containing loop
 #define rep(i,a,b) for(i = (a); i < (b); i++)
                                   ^
./Main.cpp:32:2: note: in expansion of macro ‘rep’
  rep(i, 1, 1000002) {
  ^

Judge Result