#include <stdio.h>

int main(void) {
    int a, b;
    char op;
    long long result;
    if (scanf("%d %c %d", &a, &op, &b) != 3 ||
        a < -1000000 || a > 1000000 || b < -1000000 || b > 1000000) {
        puts("Invalid input.");
        return 1;
    }
    switch (op) {
        case '+': result = (long long)a + b; break;
        case '-': result = (long long)a - b; break;
        case '*': result = (long long)a * b; break;
        case '/':
        case '%':
            if (b == 0) {
                puts("Cannot divide or take remainder by zero.");
                return 1;
            }
            result = op == '/' ? a / b : a % b;
            break;
        default:
            puts("Unsupported operator.");
            return 1;
    }
    printf("Result: %lld\n", result);
    return 0;
}