Submission #1781672

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define fo(i,a,b) for(int i=(a);i<(b);i++)
#define MOD 1000000007
#define MP make_pair
#define PB push_back
#define SZ(a) ((int)a.size())
typedef long long ll;

int N, a[100100], b[100100], c[100100], v[100100];
ll ans, cur;

int main () {
        scanf("%d", &N);
        fo(i, 0, N) scanf("%d", &a[i]);
        fo(i, 0, N) scanf("%d", &b[i]);
        fo(i, 0, N) scanf("%d", &c[i]);
        sort(a, a+N);
        sort(b, b+N);
        sort(c, c+N);

        int j = 0;
        fo(i, 0, N) {
                while (j < N && a[j] < b[i]) j++;
                v[i] = j;
        }

        j = 0;
        fo(i, 0, N) {
                while (j < N && b[j] < c[i]) cur += v[j++];
                ans += cur;
        }

        printf("%lld\n", ans);

        return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &N);
                        ^
./Main.cpp:15:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         fo(i, 0, N) scanf("%d", &a[i]);
                                       ^
./Main.cpp:16:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         fo(i, 0, N) scanf("%d", &b[i]);
                                       ^
./Main.cpp:17:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         fo(i, 0, N) scanf("%d", &c[i]);
                                       ^

Judge Result