Submission #263459

#	Time	Username	Problem	Language	Result	Execution time	Memory
263459		Falcon	Remittance (JOI19_remittance)	C++14	100 / 100	474 ms	36472 KiB

remittance

#pragma GCC optimize("O2")

#include <bits/stdc++.h>
#ifdef DEBUG
    #include "debug.hpp"
#endif

using namespace std;

#define all(c) (c).begin(), (c).end()
#define traverse(c, it) for(auto it = (c).begin(); it != (c).end(); it++)
#define rep(i, N) for(int i = 0; i < (N); i++)
#define rep1(i, N) for(int i = 1; i <= (N); i++)
#define rep2(i, s, e) for(int i = (s); i <= (e); i++)
#define rep3(i, s, e, d) for(int i = (s); (d) >= 0 ? i <= (e) : i >= (e); i += (d))
#define pb push_back


#ifdef DEBUG
    #define debug(x...) {dbg::depth++; string dbg_vals = dbg::to_string(x); dbg::depth--; dbg::fprint(__func__, __LINE__, #x, dbg_vals);}
    #define light_debug(x) {dbg::light = 1; dbg::dout << __func__ << ":" << __LINE__ << "  " << #x << " = " << x << endl; dbg::light = 0;}
#else
    #define debug(x...)
    #define light_debug(x) 
#endif

template<typename T>
T& ckmin(T& a, T b){ return a = a > b ? b : a; }

template<typename T>
T& ckmax(T& a, T b){ return a = a < b ? b : a; }

using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;


signed main(){

    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    #ifdef DEBUG
        freopen("debug", "w", stderr);
    #endif
    
    int n;
    cin >> n;

    vector<ll> a(n), b(n);
    rep(i, n) cin >> a[i] >> b[i];

    rep(k, 50){
    	rep(i, n)
    		if(a[i] > b[i]){
    			ll t = ((a[i] - b[i] + 1) >> 1) - (b[i] == 0 && (a[i] & 1));
    			a[(i + 1) % n] += t, a[i] -= t << 1;
    		}
    }

    bool f = true;
    rep(i, n) f &= a[i] == b[i];

    cout << (f ? "Yes\n" : "No\n");

    #ifdef DEBUG
        dbg::dout << "\nExecution time: " << clock() << "ms\n";
    #endif

    return 0;
}

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