제출 #1341809

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1341809		doantaolaaidi	Nizin (COCI16_nizin)	C++20	100 / 100	38 ms	4176 KiB

nizin

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define AC "test"
#define foru(i, l, r) for (int i = (l); i <= (r); i++)
#define ford(i, l, r) for (int i = (l); i >= (r); i--)
#define fi first
#define se second

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vii;
typedef vector<ll> vll;

const ll inf = 1e9 + 7;
const ll linf = 1e18 + 7;
const int mod = 1e9 + 7;
const int maxn = 1e6 + 7;
const int base = 31;

void fastIO(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
}

ll mul(ll a, ll b){
    a%=mod;
    ll res = 0;
    while (b){
        if (b%2) res = (res + a)%mod;
        a = (a + a)%mod;
        b/=2;
    }
    return res;
}

ll Pow(ll a, ll b){
    ll ans = 1;
    while (b){
        if (b % 2) ans = mul(ans, a);
        a = mul(a, a);
        b/=2;
    }
    return ans;
}

int n, ed, st, a[maxn], res;

void inp(){
    cin >> n;
    foru(i, 1, n) cin >> a[i];
    st = 1;
    ed= n;
    while (st < ed){
        if (a[st] == a[ed]){
            st++;
            ed--;
        }
        else{
            if (a[st] < a[ed]){
                st++;
                res++;
                a[st] += a[st - 1];
            }
            else{
                ed--;
                res++;
                a[ed] += a[ed + 1];
            }
        }
    }
    cout << res;
}

int main(){
    fastIO();
    if (fopen(AC".inp", "r")){
        freopen(AC".inp", "r", stdin);
        freopen(AC".out", "w", stdout);
    }
    inp();
}

컴파일 시 표준 에러 (stderr) 메시지

nizin.cpp: In function 'int main()':
nizin.cpp:79:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |         freopen(AC".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
nizin.cpp:80:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |         freopen(AC".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10