Submission #1438498

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

#define INF 2147483647
#define MOD 1000000007
#define EPS 1e-10
#define int long long
#define rep(i, N) for (int i = 0; i < N; i++)
#define Rep(i, N) for (int i = 1; i < N; i++)
#define For(i, a, b) for (int i = (a); i < (b); i++)
#define pb push_back
#define eb emplece_back
#define mp make_pair
#define i_i pair<int, int>
#define vi vector<int>
#define vvi vector<vi >
#define vb vector<bool>
#define vvb vector<vb >
#define vp vector< i_i >
#define Edge pair< i_i, int>
#define all(a) (a).begin(), (a).end()
#define Int(x) int x; scanf("%lld", &x);
#define int2(x, y) int x, y; scanf("%lld %lld", &x, &y);
#define fir first
#define sec second
#define ffir first.first
#define fsec first.second
#define sfir second.first
#define ssec second.second
 
//int dxy[5] = {0, 1, 0, -1, 0};
// assign

signed main()
{
    Int(n);
    vp data(n);
    rep(i, n) {
        cin >> data[i].fir;
        data[i].sec = i+1;
    }
    sort(all(data));

    set<int> st;
    st.insert(0);
    st.insert(n+1);
    int ans = 0;
    rep(i, n) {
        int num = data[i].fir, pos = data[i].sec;
//        cout << pos << endl;
        st.insert(pos);
        auto ptr = st.find(pos);
        auto l = --ptr;
        ptr++; auto r = ++ptr;
        ptr--;
        ans += (pos - *l) * num * (*r - pos);
    }
    cout << ans << endl;

    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:23:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 #define Int(x) int x; scanf("%lld", &x);
                                        ^
./Main.cpp:37:5: note: in expansion of macro ‘Int’
     Int(n);
     ^

Judge Result