제출 #1280172

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1280172		icebear	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	102 ms	5736 KiB

foehn_phenomena

// ~~ icebear ~~
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;

template<class T>
    bool minimize(T &a, const T &b) {
        if (a > b) return a = b, true;
        return false;
    }

template<class T>
    bool maximize(T &a, const T &b) {
        if (a < b) return a = b, true;
        return false;
    }

#define FOR(i,a,b) for(int i=(a); i<=(b); ++i)
#define FORR(i,a,b) for(int i=(a); i>=(b); --i)
#define REP(i, n) for(int i=0; i<(n); ++i)
#define RED(i, n) for(int i=(n)-1; i>=0; --i)
#define MASK(i) (1LL << (i))
#define BIT(S, i) (((S) >> (i)) & 1)
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define task "icebear"
/*END OF TEMPLATE. ICEBEAR AND THE CAT WILL WIN VOI26 */

const int MOD = 1e9 + 7;
const int inf = 1e9 + 27092008;
const ll INF = 1e18 + 27092008;
const int N = 2e5 + 5;
int n, q, S, T;
ll a[N];

void init(void) {
    cin >> n >> q >> S >> T;
    FOR(i, 0, n) cin >> a[i];
}

void process(void) {
    FOR(i, 0, n - 1) a[i] = a[i] - a[i + 1];
    ll res = 0;
    FOR(i, 0, n - 1) res += 1LL * a[i] * (a[i] > 0 ? T : S);
    while(q--) {
        int l, r, x;
        cin >> l >> r >> x;
        res -= 1LL * a[l - 1] * (a[l - 1] > 0 ? T : S);
        a[l - 1] -= x;
        res += 1LL * a[l - 1] * (a[l - 1] > 0 ? T : S);

        if (r < n) {
            res -= 1LL * a[r] * (a[r] > 0 ? T : S);
            a[r] += x;
            res += 1LL * a[r] * (a[r] > 0 ? T : S);
        }
        cout << res << '\n';
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int tc = 1;
//    cin >> tc;
    while(tc--) {
        init();
        process();
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.cpp:72:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60