看了题解,用vector作的，不知为何有的时候RE，有的时候WA

Her_Lingxiao @ 2020-06-08 11:54:16

#include <cstdio>
#include <cstring>
#include <vector>
using namespace std;
int main()
{
    int n, q;
    int ZanCun[5];
    vector<vector<int> > Cab;
    scanf("%d %d", &n, &q);
    #if 0
    printf("\n%d %d\n", n, q);
    #endif
    for(int i = 1; i <= q; i++)
    {
        memset(ZanCun, 0, 5);
        int a;
        scanf("%d", &a);
        if(a == 1)
        {
            for(int j = 1; j <= 3; j++)
                scanf("%d", &ZanCun[j]);
            if(ZanCun[3] != 0)
                Cab[ZanCun[1]][ZanCun[2]] += ZanCun[3];
            else
                Cab[ZanCun[1]][ZanCun[2]] = 0;
        }
        else if(a == 2)
        {
            for(int j = 1; j <= 2; j++)
                scanf("%d", &ZanCun[j]);
            printf("%d\n", Cab[ZanCun[1]][ZanCun[2]]);
        }
    }

    return 0;
}

by C6H14 @ 2020-06-08 13:02:43

Cab要初始化

by 从蒟蒻到小犇 @ 2020-06-08 14:48:38

vector得用push_back操作的……建议楼主学到图论的时候再磕vector吧，这个STL用法难度不是入门水平感觉……

by shiroi @ 2020-06-08 15:40:40

有语法错误。这样使用需要resize

by Her_Lingxiao @ 2020-06-10 14:48:41

我又改了一下，但是只有20分……

#include <cstdio>
#include <iostream>
#include <cstring>
#include <vector>
using namespace std;
const int MAX = int(1e5) + 20;
struct BigCub
{
    vector<int> NumCub;
    vector<int> ThingCub;
}cub[MAX];
int temp;
int main()
{
    int n, q;
    scanf("%d %d", &n, &q);
    for(int i = 1; i <= q; i++)
    {
        int Judge;
        scanf("%d", &Judge);
        if(Judge == 1)
        {
            int x, y, num;
            scanf("%d %d %d", &x, &y, &num);
            cub[x].NumCub.push_back(y);
            cub[x].ThingCub.push_back(num);
        }
        if(Judge == 2)
        {
            int x, y;
            scanf("%d %d", &x, &y);
            for(int j = 0; j < cub[x].NumCub.size(); j++)
            {
                if(cub[x].NumCub[j] == y)
                {
                    cout << cub[x].ThingCub[j] << endl;
                    break;
                }
            }
        }   
    }
    return 0;
}

by Her_Lingxiao @ 2022-07-07 00:07:28

没事了

两年了 过了（）