Submission #885549

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Source Code Expand

#include <cstdio>
#include <string>

using namespace std;

using i64=long long;

i64 F(string s) {
    string table("0123356777");
    int n=s.size();
    for (int i=0; i<n; ++i) {
        s[i] = table[s[i]-'0'];

        if (s[i]=='4' || s[i]=='9') {
            s.replace(i+1, n-i-1, string(n-i-1, '8'));
            break;
        }
    }

    i64 res=0;
    for (int i=0; i<n; ++i) {
        res *= 8;
        res += s[i]-'0';
    }

    return res;
}

i64 atox(string s) {
    i64 res=0;
    int n=s.size();
    for (int i=0; i<n; ++i) {
        res *= 10;
        res += s[i]-'0';
    }
    return res;
}

int main() {
    char buf[20];
    scanf("%s", buf);
    string A(buf);

    scanf("%s", buf);
    string B(buf);

    for (int i=A.size(); i--;) {
        if (A[i] > '0') {
            --A[i];
            break;
        } else {
            A[i] = '9';
        }
    }

    printf("%lld\n", atox(B)-atox(A)-(F(B)-F(A)));
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:41:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s", buf);
                     ^
./Main.cpp:44:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s", buf);
                     ^

Judge Result