GH-42: Solve codeforces 282A (#91)

Author: rain1024

problems/codeforces282A/.gitginore

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+solution

problems/codeforces282A/README.md

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+# Problem 
+
+## Usage
+
+Run program with an example
+
+```
+bazel run src/main:solution < tests/data/1.in
+```
+
+Test program
+
+```
+# Run all tests
+bazel test --test_output=all tests:solution_test
+bazel test --test_output=all --cache_test_results=no tests:solution_test
+# Run test with pecific test id
+bazel test --test_output=all tests:solution_test --test_arg=1
+```

problems/codeforces282A/run_tests.sh

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+for f in $(cd tests/; ls *.in); do
+  test_id=$(echo $f | cut -d'.' -f1)
+  ./solution < tests/$test_id.in | diff -aur tests/$test_id.out -
+done

problems/codeforces282A/src/main/BUILD

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+load("@rules_cc//cc:defs.bzl", "cc_binary")
+
+cc_binary(
+    name = "solution",
+    srcs = ["solution.cpp"],
+    visibility = ["//visibility:public"],
+)

problems/codeforces282A/src/main/solution.cpp

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+#include <cmath>
+#include <vector>
+#include <map>
+#include <algorithm>
+#include <string>
+#include <iostream>
+
+using namespace std;
+
+int main(){
+  ios::sync_with_stdio(false);
+  cin.tie(0);
+  int tt;
+  int x = 0;
+  cin >> tt;
+  string s;
+  while(tt--){
+    cin >> s;
+    if(s[1] == '+'){
+      x++;
+    } else {
+      x--;
+    }
+  }
+  cout << x << endl;
+  return 0;
+}

problems/codeforces282A/tests/BUILD

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+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_test")
+
+cc_test(
+    name = "solution_test",
+    srcs = ["solution_test.cpp"],
+    deps = [
+      "//problems/codeforces282A/src/main:solution",
+      "@com_google_googletest//:gtest_main",
+    ],
+    data = ["data"]
+)

problems/codeforces282A/tests/data/1.in

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+1
+++X

problems/codeforces282A/tests/data/1.out

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+1

problems/codeforces282A/tests/data/2.in

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+2
+X++
+--X

problems/codeforces282A/tests/data/2.out

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+0