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How to solve problem I???

Will we get any editorial?

Code of problem k is provided below can anyone tell me why it shows wrong answer on test 2 .i have observed if sum of digits is divisible by 3 then that number is divisibld by 3 .so i make an digits array then count number of subarrays having digitsum 3 .#include

include

include

using namespace std;

int solution(vector arr, int n, int k) { int ans = 0; map<int, int> map; map[0] = 1; int sum = 0; int rem = 0; for (int i = 0; i < n; i++) { sum += arr[i]; rem = sum % k; if (rem < 0) { rem += k; } if (map.find(rem) != map.end()) { ans += map[rem]; } map[rem]++; } return ans; }

int main() { int t; cin >> t; while(t--){ int m,n; cin >> m>>n; vectorarr(m); string str = to_string(n); // int arr[m]; for (int i = 0; i < m; i++) { arr[i]=str[i]-'0'; } int k; k=3; cout << solution(arr, m, k) << endl; } return 0; }

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Auto comment: topic has been updated by Arnob (previous revision, new revision, compare).

Arnob Brother, in L. not-incomplete question, why x constraint in 12 to 14?

question link: https://mirror.codeforces.com/gym/104663/problem/L?fbclid=IwAR3ZRc0KoevcYUKfBj2CT8GCs1kCBvxSsvfzXzGn6xo8jUCP_tK1o8IWTJI