smwahtfull

#include<stdio.h>
char s[110],ifs[]= {'i','f'},elses[]= {'e','l','s','e',' '};
char fors[]={'f','o','r'},scanfs[]={'s','c','a','n','f','(','"','%','d','"',',','&'};
char printfs[]={'p','r','i','n','t','f','(','"','%','d','"',','};
int valid(char a)
{
    if(a>='A'&&a<='Z'||a>='a'&&a<='z')
        return 1;
    return 0;
}
int isif(int l,int r)
{
    int i,j,f=1;
    for(i=l,j=0; i<r; i++,j++) {
        if(ifs[j]!=s[i]) {
            f=0;
        }
    }
    return f;
}
int iselse(int r)
{
    int i,f=1;
    for(i=0; i<r; i++) {
        if(elses[i]!=s[i]) {
            f=0;
        }
    }
    return f;
}
int isfor(int r)
{
    int i,f=1;
    for(i=0; i<r; i++) {
        if(fors[i]!=s[i]) {
            f=0;
        }
    }
    return f;
}
int isscanf(int r)
{
    int i,f=1;
    for(i=0; i<r; i++) {
        if(scanfs[i]!=s[i]) {
            f=0;
        }
    }
    return f;
}
int isprintf(int r)
{
    int i,f=1;
    for(i=0; i<r; i++) {
        if(printfs[i]!=s[i]) {
            f=0;
        }
    }
    return f;
}
int main()
{
    int i,j,f=1;
    scanf("%[^\n]s",s);
    if(isif(0,2)) {
        if(s[2]=='(') {
            if(valid(s[3])) {
                if(s[4]=='<'||s[4]=='>'||s[4]=='=') {
                    if(!isdigit(s[5])&&s[5]=='=') {
                        if(isdigit(s[6])) {
                            i=6;
                            while(isdigit(s[i])) {
                                i++;
                            }
                            if(s[i]==')'&&!s[i+1]) {
                                printf("if = identifier\n");
                                printf("() = parenthesis\n");
                                printf("%c%c = operator\n",s[4],s[5]);
                                printf("%c = variable\n",s[3]);
                                for(j=6; j<i; j++)printf("%c",s[j]);
                                printf(" = integer\n");
                            }
                            else f=0;
                        }
                        else f=0;
                    }
                    else if(isdigit(s[5])) {
                        i=5;
                        while(isdigit(s[i])) {
                            i++;
                        }
                        if(s[i]==')'&&!s[i+1]) {
                            printf("if = identifier\n");
                            printf("() = parenthesis\n");
                            printf("%c = operator\n",s[4]);
                            printf("%c = variable\n",s[3]);
                            for(j=5; j<i; j++)printf("%c",s[j]);
                            printf(" = integer\n");
                        }
                    }
                    else f=0;
                }
                else f=0;
            }
            else f=0;
        }
        else f=0;
    }
    else if(iselse(5)&&isif(5,7)) {
        if(s[7]=='(') {
            if(valid(s[8])) {
                if(s[9]=='<'||s[9]=='>'||s[9]=='=') {
                    if(!isdigit(s[10])&&s[10]=='=') {
                        if(isdigit(s[11])) {
                            i=11;
                            while(isdigit(s[i])) {
                                i++;
                            }
                            if(s[i]==')'&&s[i+1]=='\0') {
                                printf("else if = identifier\n");
                                printf("() = parenthesis\n");
                                printf("%c%c = operator\n",s[9],s[10]);
                                printf("%c = variable\n",s[8]);
                                for(j=11; j<i; j++)printf("%c",s[j]);
                                printf(" = integer\n");
                            }
                            else f=0;
                        }
                        else f=0;
                    }
                    else if(isdigit(s[10])) {
                        i=10;
                        while(isdigit(s[i])) {
                            i++;
                        }
                        if(s[i]==')'&&s[i+1]=='\0') {
                            printf("else if = identifier\n");
                            printf("() = parenthesis\n");
                            printf("%c = operator\n",s[9]);
                            printf("%c = variable\n",s[8]);
                            for(j=10; j<i; j++)printf("%c",s[j]);
                            printf(" = integer\n");
                        }
                    }
                    else f=0;
                }
                else f=0;
            }
            else f=0;
        }
        else f=0;
    }
    else if(isfor(3)) {
        if(s[3]=='(') {
            if(valid(s[4])&&s[5]=='='&&isdigit(s[6])&&s[7]==';') {
                if(valid(s[8])) {
                    if(s[9]=='<'||s[9]=='>'||s[9]=='=') {
                        if(!isdigit(s[10])&&s[10]=='=') {
                            if(isdigit(s[11])) {
                                i=11;
                                while(isdigit(s[i])) {
                                    i++;
                                }
                                if(s[i]==';'&&isalpha(s[++i])&&s[++i]=='+'&&s[++i]=='+'&&s[++i]==')') {
                                    printf("for = identifier\n");
                                    printf("() = parenthesis\n");
                                    printf("%c = operator\n",s[5]);
                                    printf("%c = operator\n",s[9]);
                                    printf("%c = variable\n",s[4]);
                                    for(j=11; j<i-4; j++)printf("%c",s[j]);
                                    printf(" = integer\n");
                                    printf("%c = integer\n",s[6]);
                                    printf("; = end of statement\n");
                                }
                                else f=0;
                            }
                            else f=0;
                        }
                    }
                    else f=0;
                }
                else f=0;
            }
            else f=0;
        }
        else f=0;
    }
    else if(isscanf(12)&&valid(s[12])&&s[13]==')'&&s[14]==';') {
                printf("scanf = identifier\n");
                printf("() = parenthesis\n");
                printf("%c = quote\n",s[6]);
                printf("%c = variable\n",s[12]);
                printf(", = comma\n");
                printf("; = end of statement\n");
    }
    else if(isprintf(12)&&valid(s[12])&&s[13]==')'&&s[14]==';') {
                printf("printf = identifier\n");
                printf("() = parenthesis\n");
                printf("%c = quote\n",s[7]);
                printf("%c = variable\n",s[12]);
                printf(", = comma\n");
                printf("; = end of statement\n");
    }
    else if(valid(s[0])) {
        if(s[1]=='=') {
            if(valid(s[2])) {
                if(s[3]=='+'||s[3]=='-') {
                    if(isdigit(s[4])) {
                        i=4;
                        while(isdigit(s[i])) {
                            i++;
                        }
                        if(s[i]==';'&&!s[i+1]) {
                            printf("%c = variable\n",s[0]);
                            printf("= = operator\n",s[1]);
                            printf("%c = operator\n",s[3]);
                            printf("%c = variable\n",s[2]);
                            for(j=4; j<i; j++)printf("%c",s[j]);
                            printf(" = integer\n");
                            printf("; = end\n");
                        }
                        else f=0;
                    }
                    else if(valid(s[4])) {
                        if(s[5]==';'&&!s[6]) {
                            printf("%c = variable\n",s[0]);
                            printf("= = operator\n",s[1]);
                            printf("%c = operator\n",s[3]);
                            printf("%c = variable\n",s[2]);
                            printf("%c = variable\n",s[4]);
                            printf("; = end\n");
                        }
                        else f=0;
                    }
                    else f=0;
                }
            }
        }
        else f=0;
    }
    if(f==0)printf("invalid\n");
    return 0;
}