#include <bits/stdc++.h> using namespace std; #define endl '\n' #define f first // #define s second #define pb(x) push_back(x) #define int long long const int MOD = 1e9+7; const int inf = 1e9; const int INF = 1e18+20; const int LOG = 25; int n; vector<int> a; int tt (int l, int r) { int len = r-l+1; if (len==1) return len; int ans=2; int L=l; for (int R=l+1; R<=r; R++) { if (R==L+1) continue; if (a[R] - a[R-1] != a[L+1] - a[L]) { L=R-1; } ans = max(ans, R-L+1); } return ans; } void solve() { int q; cin>>n>>q; a.resize(n); for (int i=0; i<n; i++) { cin>>a[i]; } while (q--) { int type; cin>>type; if (type==1) { int l, r, s, c; cin>>l>>r>>s>>c; l--; r--; for (int i=l; i<=r; i++) { a[i]+= (s + (i-l)*c); } } else if (type == 2) { int l, r, s, c; cin>>l>>r>>s>>c; l--; r--; for (int i=l; i<=r; i++) { a[i] = (s + (i-l)*c); } } else { int l, r; cin>>l>>r; l--; r--; cout<<tt(l, r)<<endl; } } } bool multi=false; int32_t main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); #ifndef ONLINE_JUDGE freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); #endif int t=1; if (multi) cin>>t; while (t--) solve(); return 0; }

Progression.cpp: In function 'int32_t main()':
Progression.cpp:91:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Progression.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~