Submission #187339

#	Time	Username	Problem	Language	Result	Execution time	Memory
187339		wet_water	Remittance (JOI19_remittance)	C++14	15 / 100	5 ms	632 KiB

remittance

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#include <bits/stdc++.h>

#define MAX_N 1000005
#define f first
#define s second

using namespace std;

typedef pair<int, int> ii;

long long A[MAX_N], B[MAX_N];
int N;

void fastscan(int &number) 
{ 
    //variable to indicate sign of input number 
    bool negative = false; 
    register int c; 
  
    number = 0; 
  
    // extract current character from buffer 
    c = getchar(); 
    if (c=='-') 
    { 
        // number is negative 
        negative = true; 
  
        // extract the next character from the buffer 
        c = getchar(); 
    } 
  
    // Keep on extracting characters if they are integers 
    // i.e ASCII Value lies from '0'(48) to '9' (57) 
    for (; (c>47 && c<58); c=getchar()) 
        number = number *10 + c - 48; 
  
    // if scanned input has a negative sign, negate the 
    // value of the input number 
    if (negative) 
        number *= -1; 
} 

void solve() {
    fastscan(N);

    int a, b;
    for (int i = 0; i < N; i ++) {
        fastscan(a);
        fastscan(b);
        
        A[i] = a;
        B[i] = b;
    }
    
    long long carry;
    for (int ii = 0; ii < 10; ii ++) {
        for (int i = 0; i < N; i ++) {
            if (A[i] > B[i]) {
                carry = ((A[i] - B[i]) / 2);
                A[i] -= ((A[i] - B[i]) / 2) * 2;
                A[(i + 1) % N] += carry;
            }
        }
    }
    
    bool flag = true;
    for (int i = 0; i < N; i ++) {
        flag = (flag && (A[i] == B[i]));
    }
    
    if (flag)
        cout << ("Yes") << endl;
    else {
        bool flag2 = true;
    
        for (int i = 0; i < N; i ++)
            flag2 = (flag2 && (A[i] - 1 == B[i]));
        for (int i = 0; i < N; i ++) {
            if (A[i] > 1)
                break;
            if (i == N - 1)
                flag2 = false;
        }
            
        cout << (flag2 ? "Yes" : "No") << endl;
    }
    
    return;
}
 
int main() {
    int T;
    T = 1;
    
    for (int i = 0; i < T; i ++) {
        solve();
    }
 
    return (0);
}

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