Seven Segment PROG1009

#include<stdio.h>
#include<iostream>
#include<string.h>
using namespace std;
typedef long long int ll;

char num[11][3][5] =
{
    {
        {" _ "},
        {"| |"},
        {"|_|"}
    },
    {
        {"   "},
        {"  |"},
        {"  |"},
    },
    {
        {" _ "},
        {" _|"},
        {"|_ "}
    },
    {
        {" _ "},
        {" _|"},
        {" _|"}
    },
    {
        {"   "},
        {"|_|"},
        {"  |"},
    },
    {
        {" _ "},
        {"|_ "},
        {" _|"}
    },
    {
        {" _ "},
        {"|_ "},
        {"|_|"}
    },
    {
        {" _ "},
        {"  |"},
        {"  |"}
    },
    {
        {" _ "},
        {"|_|"},
        {"|_|"},
    },
    {
        {" _ "},
        {"|_|"},
        {" _|"}
    }
};

int main()
{
    int n,m;
    scanf("%d %d",&n,&m);

    char sevenN[5][50];for(int i=0;i<5;i++)for(int j=0;j<50;j++)sevenN[i][j] = '\0';
    char sevenM[5][50];for(int i=0;i<5;i++)for(int j=0;j<50;j++)sevenM[i][j] = '\0';

    int maxlenN = -1;
    int maxlenM = -1;
    for(int i=0;i<4;i++){ //scanN
        cin.getline(sevenN[i],50);
        maxlenN = max(maxlenN,(int)strlen(sevenN[i]));
    }
    for(int i=1;i<4;i++){ //cleaning N
        for(int j=0;j<maxlenN;j++){
            if(sevenN[i][j] == '\0')sevenN[i][j] = ' ';
        }
        sevenN[i][maxlenN] = '\0';
    }
    for(int i=1;i<4;i++){ //scanM
        cin.getline(sevenM[i],50);
        maxlenM = max(maxlenM,(int)strlen(sevenM[i]));
    }
    for(int i=1;i<4;i++){ //cleaning M
        for(int j=0;j<maxlenM;j++){
            if(sevenM[i][j] == '\0')sevenM[i][j] = ' ';
        }
        sevenM[i][maxlenM] = '\0';
    }
    ll valn = 0,valm = 0;
    int indexN = 0;
    int indexM = 0;
    while(indexN < maxlenN){
        char sevenT[5][5];
        for(int i=1;i<=3;i++){
            for(int j=indexN;j<indexN+3;j++){
                sevenT[i][j-indexN] = sevenN[i][j];
            }
            sevenT[i][3] = '\0';
        }
        int numi;
        bool isnum = false;
        for(numi = 0;numi<=9 && !isnum;numi++){
            int skip = false;
            for(int i=1;i<=3 && !skip;i++){
                for(int j=1;j<=3 && !skip;j++){
                    if(sevenT[i][j-1] != num[numi][i-1][j-1]){
                        skip = true;
                    }
                }
            }
            if(!skip){
                isnum = true;
            }
        }
        valn += numi-1;
        valn *= 10;
        indexN += 4;
    }valn/=10;


    while(indexM < maxlenM){
        int temp;
        char sevenT[5][5];
        for(int i=1;i<=3;i++){
            for(int j=indexM;j<indexM+3;j++){
                sevenT[i][j-indexM] = sevenM[i][j];
            }
            sevenT[i][3] = '\0';
        }
        int numi;
        bool isnum = false;
        for(numi = 0;numi<=9 && !isnum;numi++){
            int skip = false;
            for(int i=1;i<=3 && !skip;i++){
                for(int j=1;j<=3 && !skip;j++){
                    if(sevenT[i][j-1] != num[numi][i-1][j-1]){
                        skip = true;
                    }
                }
            }
            if(!skip){
                isnum = true;
            }
        }
        valm += numi-1;
        valm *= 10;
        indexM += 4;
    }valm/=10;
    printf("%lld",valn+valm);
    return 0;
}