PAT 1037 Magic Coupon

#include <cstdio>
#include <cstdlib>
#include <vector>
#include <algorithm>

using namespace std;

void print(vector<int> &v) {
    int len = v.size();
    for (int i=; i<len; i++) {
        printf(" %d", v[i]);
    }
    printf("\n");
}

int main() {
    int NC, NP;
    scanf("%d", &NC);
    vector<int> C(NC);

    for (int i=; i<NC; i++) {
        scanf("%d", &C[i]);
    }

    scanf("%d", &NP);
    vector<int> P(NP);
    for (int i=; i<NP; i++) {
        scanf("%d", &P[i]);
    }

    sort(C.begin(), C.end(), greater<int>());
    sort(P.begin(), P.end(), greater<int>());

    int clen = C.size();
    int plen = P.size();

    int ci = ;
    int pi = ;
    int dc, dp;
    long long sum = ;

    while (ci < clen && pi < plen && (dc=C[ci]) >  && (dp=P[pi]) > ) {
        sum += dc * dp;
        ci++, pi++;
    }

    ci = clen - ;
    pi = plen - ;

    while (ci >=  && pi >=  && (dc=C[ci]) <  && (dp=P[pi]) < ) {
        sum += dc * dp;
        ci--, pi--;
    }
    printf("%lld", sum);
    return ;
}

有个case 30+ms是不是方法错了？