Submission #55486868

---

Source Code Expand

#ifndef INCLUDED_MAIN
#define INCLUDED_MAIN

#include __FILE__
int main(){
    // Write here!
    ll N, M;
    cin >> N >> M;
    ll si, sj = -1;
    bool ans = true;
    /*
     1  2  3  4  5  6  7
     8  9 10 11 12 13 14
            ↓ -1
     0  1  2  3  4  5  6  : 0
     7  8  9 10 11 12 13  : 1
    */
    rep(i,N){
        rep(j,M){
            ll B;
            cin >> B;
            if(i+j==0){
                // 一番最初
                // B[0][0]より(i-1)x7+jのi,jを求める
                sj = (B-1)%7; // WA: ここでB-1にするのを忘れていた
                // 1から7なら一行目 → x-1/7
                si = (B-1)/7;
            }else{
                // WA: 8行目以降を考慮していなかった
                if(j+sj>=7) ans = false;
                if(B!=(si+i)*7+(j+sj)+1) ans = false;
            }
        }
    }
    yn(ans);
    return 0;
}

#else
#include<bits/stdc++.h>
#include <atcoder/all>

using namespace std;
using namespace atcoder;

using ll = long long;
#define rep(i,n) for(ll i=0; i<(n); i++)
#define reps(i,s,n) for(ll i=(s); i<(n); i++)
#define all(x) (x).begin(),(x).end()
#define lb_ind(a,key) lower_bound(all((a)), (key)) - (a).begin()
#define llvec(a,n) vector<ll> (a)((n))
#define yn(flg) cout<<(flg?"Yes":"No")<<endl;

#endif

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:31:26: warning: ‘si’ may be used uninitialized [-Wmaybe-uninitialized]
   31 |                 if(B!=(si+i)*7+(j+sj)+1) ans = false;
      |                       ~~~^~~
Main.cpp:9:8: note: ‘si’ was declared here
    9 |     ll si, sj = -1;
      |        ^~

Judge Result