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Codeforces, redefined

Codeforces with a real editor built in

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Cleaner statements, ready-to-code templates.

Problem statements render LaTeX cleanly, samples keep real line breaks, and C/C++/Java/Python open with useful starter templates. The editor status bar now shows your real cursor line and column.

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A. Positive Sum

Newbie
800implementationmath
time limit per test: 2 secondsmemory limit per test: 256 megabytes

You are given t test cases. Each test case consists of an integer n, followed by n integers a₁, a₂, …, aₙ.

Determine whether the sum of all elements is strictly positive.

Input

The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases.

Each test case consists of two lines. The first line contains an integer n (1 ≤ n ≤ 100). The second line contains n integers aᵢ (1 ≤ aᵢ ≤ 100).

Output

For each test case, print "Yes" if the sum of all elements is positive, and "No" otherwise. You can print each letter in any case.

Example 1
Input:
1
3
1 2 3
Output:
Yes
Example 2
Input:
1
1
5
Output:
Yes

Constraints

  • 1 ≤ t ≤ 100
  • 1 ≤ n ≤ 100
  • 1 ≤ aᵢ ≤ 100
#include<iostream>
using namespace std;
void solve(){
int n;cin>>n;
// messy spacing on purpose
cout<<"Yes"<<"
";
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int t;cin>>t;
while(t--)solve();
return 0;
}
221 chars · 15 linespowered by Leetify
INPUT
1
3
1 2 3

Benefits

Everything you need on one page

Built for contest flow — fewer tabs, less friction, faster submits.

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Split-pane flow

Statement and editor side by side — context never leaves the screen.

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Format in one click

Tidy messy code before submit, client-side.

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Hit Run, flip to results — no page reload dance.

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Themes that read well

Dark and light modes tuned for long contest nights.

Workflow

From install to AC in three steps

  1. 01

    Install

    Add Leetify from the Chrome Web Store — one click on any Codeforces problem.

  2. 02

    Open a problem

    The extension reshapes the page into a focused workspace automatically.

  3. 03

    Code, test, submit

    Format, run cases, add custom tests, and submit without leaving the pane.

Explore the interactive demosouth
#include<iostream>
using namespace std;
void solve(){
int n;cin>>n;
// messy spacing on purpose
cout<<"Yes"<<"
";
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int t;cin>>t;
while(t--)solve();
return 0;
}
221 chars · 15 linespowered by Leetify
INPUT
1
3
1 2 3

Our approach

We redesigned the flow, not the site

Codeforces is great precisely because it's open, simple, and minimal. So we didn't rebuild the website — we reshaped only the one place it matters most: the problem and submission flow, merging every step you juggle into a single page while you solve.

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Respect the original

Codeforces earned its place with an open, simple, minimal design. We left the site you already know exactly as it is.

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One page, one flow

We reshaped only the problem and submission experience — merging separate steps into a single focused workspace.

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Functionality over style

No jumping between VS Code, Notion, notebooks, or a separate submissions page. Everything you need lives where you solve.

auto_awesomeIt provides functionality, not style — style is subjective.

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