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1896. Expression

Time Limit: 1 seconds
Memory Limit:262144KB
Points:100
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Дана строка вида <цифра><знак><цифра><знак>...<знак><цифра>, где <знак> — это символ плюс или минус. Найти значение этого выражения.

Sample

InputOutput
3+1-4+1-5

-4
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Problems from Contests and Camps / School olympiads and couses of Vologda region / Different Contests / Contest for seventh graders on strings /
1895. 1 - Changes of letters and digits 1896. 1353. 3 - 16 -> 20 1897. 4 - Number of occurrences 1898. 5 - Last occurence
Educational Courses / C++ Programming Language / Strings /
1895. 01 - Changes of letters and digits 1896. 1353. 03 - 16 -> 20 1897. 04 - Number of occurrences 1898. 05 - Last occurence
time generating 0.078 sec.
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