oj.uz

Submission #187336

# Submission time Handle Problem Language Result Execution time Memory
187336 2020-01-12T18:25:14 Z wet_water Remittance (JOI19_remittance) C++14
0 / 100
 2 ms 376 KB 
#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];
long long 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() {
    cin >> 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 < 100; 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
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 372 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 372 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 372 KB Output isn't correct
3 Halted 0 ms 0 KB -