TASK_053 - Poramee's Solution

#include <stdio.h>

int vertical[105];
int horizontal[105];
int diagonal;
bool numCheck[110];

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

    for(int i = 0;i < n;++i){
        for(int a = 0;a < n;++a){
            int input;
            scanf("%d",&input);
            numCheck[input] = true;
            vertical[i] += input;
            horizontal[a] += input;
            if(i == a) diagonal += input;
        }
    }
    int baseValue = vertical[0];
    int bound = n * n;
    for(int i = 1;i <= bound;++i){
        if(numCheck[i] == false){
            printf("No");
            return 0;
        }
    }
    for(int i = 0;i < n;++i){
        if(vertical[i] != baseValue){
            printf("No");
            return 0;
        }
        else if(horizontal[i] != baseValue){
            printf("No");
            return 0;
        }
    }
    if(diagonal != baseValue) printf("No");
    else printf("Yes");

    return 0;
}