View Compilation Error

0_0_21053660_15003.cpp: In function 'int main()':
0_0_21053660_15003.cpp:36:4: error: '_int64' was not declared in this scope
    _int64 sum = 0;
    ^
0_0_21053660_15003.cpp:38:5: error: 'sum' was not declared in this scope
     sum = (sum + jieyu(i, m)) % m;
     ^
0_0_21053660_15003.cpp:40:20: error: 'sum' was not declared in this scope
    printf("%I64d", sum);
                    ^