Submission #570385

#	Time	Username	Problem	Language	Result	Execution time	Memory
570385		urd05	송금 (JOI19_remittance)	C++17	0 / 100	1 ms	340 KiB

remittance

#include <bits/stdc++.h>
using namespace std;
 
int n;
long long c[1000001];
long long arr[1000001]; //비트 저장
long long value[1000001];
long long money[1000001];
bool vis[1000001];
 
int main() {
    scanf("%d",&n);
    for(int i=1;i<=n;i++) {
        int a,b;
        scanf("%d %d",&a,&b);
        money[i]=a;
        c[i]=b-a;
    }
    arr[0]=(c[1]&1);
    long long val=(c[1]>>1);
    for(int i=1;i<n;i++) {
        val+=c[i+1];
        arr[i]=(val&1);
        val=(val>>1);
    }
    long long mok=val;
    long long pr=val;
    arr[0]+=val;
    while (pr!=0) {
        long long now=0;
        for(int i=0;i<n;i++) {
            if (i==n-1) {
                now+=(arr[i]>>1);
            }
            else {
                arr[i+1]+=(arr[i]>>1);
            }
            arr[i]=(arr[i]&1);
        }
        pr=now;
        mok+=now;
        arr[0]+=now;
    }
    bool flag=true;
    for(int i=1;i<n;i++) {
        if (arr[i]!=arr[i-1]) {
            flag=false;
            break;
        }
    }
    if (!flag) {
        printf("No");
        return 0;
    }
    if (arr[0]==1) {
        mok++;
    }
    if (mok>0) {
        printf("No");
        return 0;
    }
    long long x=-mok;
    value[n]=x;
    for(int i=n-1;i>0;i--) {
        x=2*x+c[i+1];
        value[i]=x;
        if (x<0) {
            printf("No");
            return 0;
        }
    }
    printf("Yes");
    return 0;
}

Compilation message (stderr)

remittance.cpp: In function 'int main()':
remittance.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
remittance.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         scanf("%d %d",&a,&b);
      |         ~~~~~^~~~~~~~~~~~~~~

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