ABSYS spoj problem solution(Anti-Blot System)

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HII GUYS........ this is a problem of string...........this is very easy but good for beginners........... HERE IS MY AC C++ solution is..... IF U HAVE ANY ISSUE IN THIS U CAN ASK ME IN COMMENT........ #include<bits/stdc++.h> using namespace std; int main() { int t; scanf("%d\n",&t); //getchar(); while(t--) { char str1[1000],str2[1000],str3[1000]; scanf("%s",str1); getchar(); getchar(); scanf("%s",str2); getchar(); getchar(); scanf("%s",str3); getchar(); /* printf("str1=%s\n",str1); printf("str2=%s\n",str2); printf("str3=%s\n",str3); */ if(strstr(str1,"machula")) { int len2=strlen(str2); int len3=strlen(str3); int num3=0; int num2=0,i; for(i=0;i<len2;i++) num2=10*num2+(str2[i]-'0'); for(i=0;i<len3;i++) num3=10*num3+(str3[i]-'0'); int ans=num3-num2; printf("%d + %s = %s\n",ans,str2,str3); continue; } if(strstr(str2,"machula")) { int len1=strlen(str1); int len3=strlen(str3); int num3=0; int num1=0,i; for(i=0;i<len1;i++) num1=10*num1+(str1[i]-'0'); for(i=0;i<len3;i++) num3=10*num3+(str3[i]-'0'); int ans=num3-num1; printf("%s + %d = %s\n",str1,ans,str3); continue; } if(strstr(str3,"machula")) { int len2=strlen(str2); int len1=strlen(str1); int num1=0; int num2=0,i; for(i=0;i<len2;i++) num2=10*num2+(str2[i]-'0'); for(i=0;i<len1;i++) num1=10*num1+(str1[i]-'0'); int ans=num1+num2; printf("%s + %s = %d\n",str1,str2,ans); continue; } } return 0; }