Submission #1297661

#	Time	Username	Problem	Language	Result	Execution time	Memory
1297661		trandangquang	Remittance (JOI19_remittance)	C++20	0 / 100	2 ms	580 KiB

remittance

#include<bits/stdc++.h>
using namespace std;

#define foru(i,a,b) for(int i=(a); i<=(b); ++i)
#define ford(i,a,b) for(int i=(a); i>=(b); --i)
#define rep(i,a) for(int i=0; i<(a); ++i)
#define sz(a) (int)(a).size()
#define all(a) (a).begin(),(a).end()
#define bit(s,i) (((s)>>(i))&1)
#define ii pair<int,int>
#define vi vector<int>
#define vii vector<ii>
#define fi first
#define se second
#define ll long long
#define eb emplace_back
#define pb push_back
#define __builtin_popcount __builtin_popcountll
#define _ << " " <<

template <class X, class Y> bool maxi(X &x, Y y){return x<y?x=y,true:false;}
template <class X, class Y> bool mini(X &x, Y y){return x>y?x=y,true:false;}

const int N=1e6+5;

int n,a[N],b[N];
void solve(){
    cin>>n;
    foru(i,1,n)cin>>a[i]>>b[i];

    while(true){
        bool chk=0;
        foru(i,1,n){
            if(a[i]>b[i]){
                int tmp=max((a[i]-b[i])/2,1);
                a[i]-=tmp*2;
                a[i%n+1]+=tmp;
                chk=1;
            }
        }
        if(!chk) break;
    }

    foru(i,1,n){
        if(a[i]!=b[i]){
            cout<<"No\n";
            return;
        }
    }
    cout<<"Yes\n";
}

int32_t main(){
    #define task "test"
    if(fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    cin.tie(0)->sync_with_stdio(0);

    int tc=1; //cin>>tc;
    foru(i,1,tc){
        solve();
    }
}

Compilation message (stderr)

remittance.cpp: In function 'int32_t main()':
remittance.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
remittance.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 45