50024. Grade

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <ctype.h>

typedef struct problem{
    int no_answer;
    bool ans[5];
} problem;

int n, r, w;
int m;
problem correct[55];
problem student[55];

inline static int max(int a, int b){
    if(a > b) return a;
    else return b;
}

void get_problem_ipt(problem* p){
    char s[16]; scanf("%s", s);
    int n = strlen(s);

    for(int i = 0; i < 5; i++) p->ans[i] = false;
    if(!strcmp(s, "N/A")){
        p->no_answer = true;
        return;
    }
    else{
        p->no_answer = false;
        for(int i = 0; i < n; i++){
            char ch = s[i];
            if(islower(ch)){
                p->ans[ch - 'a'] = true;
            }
            else{
                p->ans[ch - 'A'] = true;
            }
        }
        return;
    }
}

int compare_ans(problem* cor, problem* stu){
    if(stu->no_answer == true) return 0;
    else{
        for(int i = 0; i < 5; i++){
            if(cor->ans[i] != stu->ans[i]) return -w;
        }
        return r;
    }
}

int main(){
    while(scanf("%d %d %d", &n, &r, &w) != EOF){
        // get correct ans
        for(int i = 0; i < n; i++) get_problem_ipt(&correct[i]);

        // get student ans
        int m; scanf("%d", &m);
        for(int i = 0; i < m; i++){
            for(int i = 0; i < n; i++) get_problem_ipt(&student[i]);

            int ans = 0;
            for(int i = 0; i < n; i++){
                ans += compare_ans(&correct[i], &student[i]);
            }

            printf("%d\n", max(ans, 0));
        }
    }
    return 0;
}