Sum

input/code.cpp: In function 'int main()':
input/code.cpp:31:6: warning: unused variable 't' [-Wunused-variable]
  int t, ma = 0;
      ^
input/code.cpp:31:9: warning: unused variable 'ma' [-Wunused-variable]
  int t, ma = 0;
         ^~

#include <iostream>
#include <cstring>

using namespace std;

int maxi;

int ways(int cap, int take) {
	int l = cap, r = take;
	int w = 0;
	while(l != r) {
		if(l + r >= maxi) {
			r--;
		}
		else {
			if(maxi - (r + l) > l && maxi - (r + l) < r) {
				w++;
			}
			else if(maxi - (r + l) >= r) {
				l++;
				r = take;
				continue;
			}
			r--;
		}
	}
	return w;
}

int main() {
	int t, ma = 0;
	
	cin >> maxi;
	
	cout << ways(1, maxi) << endl;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED