PTA 乙级 1066 图像过滤 (15分) C++

 少一个for运行超时了???

#include<iostream>
#include<vector>

using namespace std;

int main() {
    int n = 0, m = 0;
    int a = 0, b = 0;
    int replace = 0;
    cin >> m >> n >> a >> b >> replace;
    int tmp = 0;
    for (int i = 0; i < m; ++i) {
        for (int j = 0; j < n; ++j) {
            cin >> tmp;
            if (j != 0)cout << ' ';
            if (tmp >= a && tmp <= b) printf("%03d", replace);
            else printf("%03d", tmp);
        }
        cout << endl;
    }
    return 0;
}

 神不神奇,意不意外

#include<iostream>
#include<vector>

using namespace std;

int main() {
    int n = 0, m = 0;
    int a = 0, b = 0;
    int replace = 0;
    cin >> m >> n >> a >> b >> replace;
    vector<vector<int>> px(m);
    for (int i = 0; i < m; ++i) px[i].resize(n);        //创建二维数组
    for (int i = 0; i < m; ++i)
        for (int j = 0; j < n; ++j)
            cin >> px[i][j];
    for (int i = 0; i < m; ++i) {
        for (int j = 0; j < n; ++j) {
            if (j != 0)cout << ' ';
            if (px[i][j] >= a && px[i][j] <= b) printf("%03d", replace);
            else printf("%03d", px[i][j]);
        }
        cout << endl;
    }

    return 0;
}