50131. Mark Syllables

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

static inline int is_vowel(char c){
    return c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u';
}

static inline void print_v(char* s, int n, int start_a, int end_a, int start_b, int end_b){
    for(int i = 0; i < n; i++){
        if(i >= start_a && i <= end_a) printf("%c", s[i]);
        else printf("+");
    }
    printf("\n");

    for(int i = 0; i < n; i++){
        if(i >= start_b && i <= end_b) printf("%c", s[i]);
        else printf("+");
    }
    printf("\n");

    for(int i = 0; i < n; i++){
        if((i >= start_b && i <= end_b) || (i >= start_a && i <= end_a)) printf("+");
        else printf("%c", s[i]);
    }
    printf("\n");
}

static inline void solve(char* s, int a, int b){
    int start_a, end_a, start_b, end_b ;

    int n = strlen(s);
    int start_idx = 0;
    int cnt = 0;
    for(int i = 0; i < n; i++){
        if(!is_vowel(s[i])) continue;
        if(cnt == a){
            start_a = start_idx;
            end_a = i;
        }
        if(cnt == b){
            start_b = start_idx;
            end_b = i;
        }
        cnt++;
        start_idx = i + 1;
    }
    print_v(s, n, start_a, end_a, start_b, end_b);
}

int main(){
    char s[10005]; int a, b;
    while(scanf("%s %d %d", s, &a, &b) == 3){
        solve(s, a, b);
    }
}